openwrt/staging/blogic.git
13 years agoMerge branch 'next' of git://git.monstr.eu/linux-2.6-microblaze
Linus Torvalds [Wed, 16 Mar 2011 17:48:16 +0000 (10:48 -0700)]
Merge branch 'next' of git://git.monstr.eu/linux-2.6-microblaze

* 'next' of git://git.monstr.eu/linux-2.6-microblaze: (33 commits)
  microblaze: Do not copy reset vectors/manual reset vector setup
  microblaze: Fix _reset function
  microblaze: Fix microblaze init vectors
  microblaze: Fix circular headers dependency when ftrace is enabled.
  microblaze: Fix typo in Kconfig
  microblaze: Add missing export symbols for lib functions
  microblaze: Fix /dev/zero corruption from __clear_user()
  microblaze: Convert irq_chip to new functions
  microblaze: Select GENERIC_HARDIRQS_NO_DEPRECATED
  microblaze: Remove stale irq_chip.end
  microblaze: Fix sparse warnings - signal.c
  microblaze: Fix sparse warning - fault.c
  microblaze: Fix missing microblaze specific syscalls declaration
  microblaze: Fix sparse warnings - cache.c
  microblaze: Fix sparse warning - cpuinfo.h
  microblaze: Fix sparse warning - unwind.c
  microblaze: Fix sparse warning - consistent_alloc function
  microblaze: Fix sparse warnings - ptrace
  microblaze: Fix sparse warning - sw_exceptions
  microblaze: Fix sparse warning - timer.c
  ...

13 years agosched.c: fix kernel-doc for runqueue_is_locked()
Randy Dunlap [Tue, 15 Mar 2011 23:12:30 +0000 (16:12 -0700)]
sched.c: fix kernel-doc for runqueue_is_locked()

Fix kernel-doc warning for runqueue_is_locked():

  Warning(kernel/sched.c:664): missing initial short description on line:

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoDocumentation: update cgroup pid and cpuset information
Eric B Munson [Tue, 15 Mar 2011 23:12:18 +0000 (16:12 -0700)]
Documentation: update cgroup pid and cpuset information

The cgroup documentation does not specify how a process can be removed
from a particular group.  This patch adds a note at the end of the
simple example about how this is done.  Also, some cgroups (like
cpusets) require user input before a new group can be used.  This is
noted in the patch as well.

Signed-off-by: Eric B Munson <emunson@mgebm.net>
Acked-by: Paul Menage <menage@google.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoDocumentation: file handles are now freed
Federica Teodori [Tue, 15 Mar 2011 23:12:05 +0000 (16:12 -0700)]
Documentation: file handles are now freed

Since file handles are freed, a little amendment to the documentation

Signed-off-by: Federica Teodori <federica.teodori@googlemail.com>
Acked-by: Rik van Riel<riel@redhat.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoDocumentation: update header filename in CodingStyle
Roland Kammerer [Tue, 15 Mar 2011 23:11:52 +0000 (16:11 -0700)]
Documentation: update header filename in CodingStyle

pr_info() and pr_debug() are in linux/printk.h, not linux/kernel.h.
Last updated is unnecessary, we have git for that.

Signed-off-by: Roland Kammerer <dev.rck@gmail.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: Harry Wei <harryxiyou@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoDocumentation: add devicetree docs index file
Rob Landley [Tue, 15 Mar 2011 23:11:41 +0000 (16:11 -0700)]
Documentation: add devicetree docs index file

The device tree infrastructure is being genericized so its documentation
moved out of the PowerPC directory.

Signed-off-by: Rob Landley <rlandley@parallels.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoDocumentation: remove obsolete files from 00-INDEX
Rob Landley [Tue, 15 Mar 2011 23:11:29 +0000 (16:11 -0700)]
Documentation: remove obsolete files from 00-INDEX

Time interpolators were removed in git 1f564ad6d41828 ("[IA64] remove
time interpolator"), and Voyager support went away in git b6b6e2b112caf
("Documentation: remove obsolete voyager.txt file")

Signed-off-by: Rob Landley <rlandley@parallels.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoMerge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Wed, 16 Mar 2011 17:14:56 +0000 (10:14 -0700)]
Merge branch 'x86-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, AMD: Set ARAT feature on AMD processors
  x86, quirk: Fix SB600 revision check
  x86: stop_machine_text_poke() should issue sync_core()
  x86, amd-nb: Misc cleanliness fixes

13 years agoMerge branch 'x86-trampoline-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Wed, 16 Mar 2011 17:10:02 +0000 (10:10 -0700)]
Merge branch 'x86-trampoline-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'x86-trampoline-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Fix binutils-2.21 symbol related build failures
  x86-64, trampoline: Remove unused variable
  x86, reboot: Fix the use of passed arguments in 32-bit BIOS reboot
  x86, reboot: Move the real-mode reboot code to an assembly file
  x86: Make the GDT_ENTRY() macro in <asm/segment.h> safe for assembly
  x86, trampoline: Use the unified trampoline setup for ACPI wakeup
  x86, trampoline: Common infrastructure for low memory trampolines

Fix up trivial conflicts in arch/x86/kernel/Makefile

13 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Wed, 16 Mar 2011 16:24:44 +0000 (09:24 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/rafael/suspend-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6: (21 commits)
  PM / Hibernate: Reduce autotuned default image size
  PM / Core: Introduce struct syscore_ops for core subsystems PM
  PM QoS: Make pm_qos settings readable
  PM / OPP: opp_find_freq_exact() documentation fix
  PM: Documentation/power/states.txt: fix repetition
  PM: Make system-wide PM and runtime PM treat subsystems consistently
  PM: Simplify kernel/power/Kconfig
  PM: Add support for device power domains
  PM: Drop pm_flags that is not necessary
  PM: Allow pm_runtime_suspend() to succeed during system suspend
  PM: Clean up PM_TRACE dependencies and drop unnecessary Kconfig option
  PM: Remove CONFIG_PM_OPS
  PM: Reorder power management Kconfig options
  PM: Make CONFIG_PM depend on (CONFIG_PM_SLEEP || CONFIG_PM_RUNTIME)
  PM / ACPI: Remove references to pm_flags from bus.c
  PM: Do not create wakeup sysfs files for devices that cannot wake up
  USB / Hub: Do not call device_set_wakeup_capable() under spinlock
  PM: Use appropriate printk() priority level in trace.c
  PM / Wakeup: Don't update events_check_enabled in pm_get_wakeup_count()
  PM / Wakeup: Make pm_save_wakeup_count() work as documented
  ...

13 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland...
Linus Torvalds [Wed, 16 Mar 2011 16:24:25 +0000 (09:24 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/roland/infiniband

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
  RDMA/cma: Replace global lock in rdma_destroy_id() with id-specific one
  IB/cm: Cancel pending LAP message when exiting IB_CM_ESTABLISH state
  IB/cm: Bump reference count on cm_id before invoking callback
  RDMA/cma: Fix crash in request handlers
  IB/ipath: Don't reset disabled devices
  IB/qib: Fix M_Key field in SubnGet and SubnGetResp MADs
  IB/qib: Set default LE2 value for active cables to 0
  RDMA/cxgb4: Debugfs dump_qp() updates
  RDMA/cxgb4: Dispatch FATAL event on EEH errors
  RDMA/cxgb4: Use ULP_MODE_TCPDDP
  RDMA/cxgb4: Enable on-chip SQ support by default
  RDMA/cxgb4: Do CIDX_INC updates every 1/16 CQ depth CQE reaps
  RDMA/cxgb4: Remove db_drop_task
  RDMA/cxgb4: Turn on delayed ACK
  IB/qib: Return correct MAD when setting link width to 255

13 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
Linus Torvalds [Wed, 16 Mar 2011 16:15:43 +0000 (09:15 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/jmorris/security-testing-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6: (33 commits)
  AppArmor: kill unused macros in lsm.c
  AppArmor: cleanup generated files correctly
  KEYS: Add an iovec version of KEYCTL_INSTANTIATE
  KEYS: Add a new keyctl op to reject a key with a specified error code
  KEYS: Add a key type op to permit the key description to be vetted
  KEYS: Add an RCU payload dereference macro
  AppArmor: Cleanup make file to remove cruft and make it easier to read
  SELinux: implement the new sb_remount LSM hook
  LSM: Pass -o remount options to the LSM
  SELinux: Compute SID for the newly created socket
  SELinux: Socket retains creator role and MLS attribute
  SELinux: Auto-generate security_is_socket_class
  TOMOYO: Fix memory leak upon file open.
  Revert "selinux: simplify ioctl checking"
  selinux: drop unused packet flow permissions
  selinux: Fix packet forwarding checks on postrouting
  selinux: Fix wrong checks for selinux_policycap_netpeer
  selinux: Fix check for xfrm selinux context algorithm
  ima: remove unnecessary call to ima_must_measure
  IMA: remove IMA imbalance checking
  ...

13 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Wed, 16 Mar 2011 16:15:21 +0000 (09:15 -0700)]
Merge git://git./linux/kernel/git/herbert/crypto-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: tcrypt - do not attempt to write to readonly variable
  random: update interface comments to reflect reality
  crypto: picoxcell - add support for the picoxcell crypto engines
  crypto: sha1 - Add test vector to test partial block processing
  hwrng: omap - Convert release_resource to release_region/release_mem_region
  crypto: aesni-intel - Fix remaining leak in rfc4106_set_hash_key
  crypto: omap-sham - don't treat NULL clk as an error
  crypto: omap-aes - don't treat NULL clk as an error
  crypto: testmgr - mark ghash as fips_allowed
  crypto: testmgr - mark xts(aes) as fips_allowed
  crypto: skcipher - remove redundant NULL check
  hwrng: pixocell - add support for picoxcell TRNG
  crypto: aesni-intel - Don't leak memory in rfc4106_set_hash_subkey

13 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw
Linus Torvalds [Wed, 16 Mar 2011 15:58:43 +0000 (08:58 -0700)]
Merge git://git./linux/kernel/git/steve/gfs2-2.6-nmw

* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw:
  GFS2: Don't use _raw version of RCU dereference
  GFS2: Adding missing unlock_page()
  GFS2: Update to AIL list locking
  GFS2: introduce AIL lock
  GFS2: fix block allocation check for fallocate
  GFS2: Optimize glock multiple-dequeue code
  GFS2: Remove potential race in flock code
  GFS2: Fix glock deallocation race
  GFS2: quota allows exceeding hard limit
  GFS2: deallocation performance patch
  GFS2: panics on quotacheck update
  GFS2: Improve cluster mmap scalability
  GFS2: Fix glock queue trace point
  GFS2: Post-VFS scale update for RCU path walk
  GFS2: Use RCU for glock hash table

13 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh...
Linus Torvalds [Wed, 16 Mar 2011 15:58:09 +0000 (08:58 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/ericvh/v9fs

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs: (46 commits)
  fs/9p: Make the writeback_fid owned by root
  fs/9p: Writeback dirty data before setattr
  fs/9p: call vmtruncate before setattr 9p opeation
  fs/9p: Properly update inode attributes on link
  fs/9p: Prevent multiple inclusion of same header
  fs/9p: Workaround vfs rename rehash bug
  fs/9p: Mark directory inode invalid for many directory inode operations
  fs/9p: Add . and .. dentry revalidation flag
  fs/9p: mark inode attribute invalid on rename, unlink and setattr
  fs/9p: Add support for marking inode attribute invalid
  fs/9p: Initialize root inode number for dotl
  fs/9p: Update link count correctly on different file system operations
  fs/9p: Add drop_inode 9p callback
  fs/9p: Add direct IO support in cached mode
  fs/9p: Fix inode i_size update in file_write
  fs/9p: set default readahead pages in cached mode
  fs/9p: Move writeback fid to v9fs_inode
  fs/9p: Add v9fs_inode
  fs/9p: Don't set stat.st_blocks based on nrpages
  fs/9p: Add inode hashing
  ...

13 years agoMerge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzi...
Linus Torvalds [Wed, 16 Mar 2011 15:57:32 +0000 (08:57 -0700)]
Merge branch 'upstream-linus' of git://git./linux/kernel/git/jgarzik/libata-dev

* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev: (29 commits)
  ahci: add another PCI ID for marvell
  libata: Use 'bool' return value for ata_id_XXX
  sata_fsl: Update RX_WATER_MARK for TRANSCFG
  sata_fsl: Fix wrong Device Error Register usage
  libata: Include WWN ID in inquiry VPD emulation
  ata/pata_arasan_cf: fill dma chan->private from pdata->dma_priv
  ata: pata: Convert pr_*(DRV_NAME ...) to pr_fmt/pr_<level>
  pata_arasan_cf: fix printk format string warning
  pata_arasan_cf: Adding support for arasan compact flash host controller
  libata-sff: add ata_sff_queue_work() & ata_sff_queue_delayed_work()
  ahci: AHCI mode SATA patch for Intel Patsburg SATA RAID controller
  ahci: recognize Marvell 88se9125 PCIe SATA 6.0 Gb/s controller
  libata: remove ATA_FLAG_LPM
  libata: remove ATA_FLAG_NO_LEGACY
  libata: remove ATA_FLAG_MMIO
  libata: remove ATA_FLAG_{SRST|SATA_RESET}
  ipr/sas_ata: use mode mask macros from <linux/ata.h>
  sata_dwc_460ex: add debugging options
  sata_dwc_460ex: fix misuse of ata_get_cmd_descript()
  sata_dwc_460ex: fix return value of dma_dwc_xfer_setup()
  ...

13 years agoMerge branch 'x86/amd-nb' into x86/urgent
Ingo Molnar [Wed, 16 Mar 2011 15:33:56 +0000 (16:33 +0100)]
Merge branch 'x86/amd-nb' into x86/urgent

Merge reason: This is one followup commit that was not in x86/mm - merge it via the urgent path

Signed-off-by: Ingo Molnar <mingo@elte.hu>
13 years agoMerge branch 'for-2.6.39' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
Linus Torvalds [Wed, 16 Mar 2011 15:22:41 +0000 (08:22 -0700)]
Merge branch 'for-2.6.39' of git://git./linux/kernel/git/tj/percpu

* 'for-2.6.39' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
  percpu, x86: Add arch-specific this_cpu_cmpxchg_double() support
  percpu: Generic support for this_cpu_cmpxchg_double()
  alpha: use L1_CACHE_BYTES for cacheline size in the linker script
  percpu: align percpu readmostly subsection to cacheline

Fix up trivial conflict in arch/x86/kernel/vmlinux.lds.S due to the
percpu alignment having changed ("x86: Reduce back the alignment of the
per-CPU data section")

13 years agoMerge branch 'for-2.6.39' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
Linus Torvalds [Wed, 16 Mar 2011 15:20:19 +0000 (08:20 -0700)]
Merge branch 'for-2.6.39' of git://git./linux/kernel/git/tj/wq

* 'for-2.6.39' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
  workqueue: fix build failure introduced by s/freezeable/freezable/
  workqueue: add system_freezeable_wq
  rds/ib: use system_wq instead of rds_ib_fmr_wq
  net/9p: replace p9_poll_task with a work
  net/9p: use system_wq instead of p9_mux_wq
  xfs: convert to alloc_workqueue()
  reiserfs: make commit_wq use the default concurrency level
  ocfs2: use system_wq instead of ocfs2_quota_wq
  ext4: convert to alloc_workqueue()
  scsi/scsi_tgt_lib: scsi_tgtd isn't used in memory reclaim path
  scsi/be2iscsi,qla2xxx: convert to alloc_workqueue()
  misc/iwmc3200top: use system_wq instead of dedicated workqueues
  i2o: use alloc_workqueue() instead of create_workqueue()
  acpi: kacpi*_wq don't need WQ_MEM_RECLAIM
  fs/aio: aio_wq isn't used in memory reclaim path
  input/tps6507x-ts: use system_wq instead of dedicated workqueue
  cpufreq: use system_wq instead of dedicated workqueues
  wireless/ipw2x00: use system_wq instead of dedicated workqueues
  arm/omap: use system_wq in mailbox
  workqueue: use WQ_MEM_RECLAIM instead of WQ_RESCUER

13 years agoMerge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Wed, 16 Mar 2011 15:10:07 +0000 (08:10 -0700)]
Merge branch 'core-rcu-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  smp: Document transitivity for memory barriers.
  rcu: add comment saying why DEBUG_OBJECTS_RCU_HEAD depends on PREEMPT.
  rcupdate: remove dead code
  rcu: add documentation saying which RCU flavor to choose
  rcutorture: Get rid of duplicate sched.h include
  rcu: call __rcu_read_unlock() in exit_rcu for tiny RCU

13 years agoIncrease OSF partition limit from 8 to 18
Linus Torvalds [Wed, 16 Mar 2011 15:04:07 +0000 (08:04 -0700)]
Increase OSF partition limit from 8 to 18

It turns out that while a maximum of 8 partitions may be what people
"should" have had, you can actually fit up to 18 entries(*) in a sector.

And some people clearly were taking advantage of that, like Michael
Cree, who had ten partitions on one of his OSF disks.

(*) The OSF partition data starts at byte offset 64 in the first sector,
    and the array of 16-byte partition entries start at offset 148 in
    the on-disk partition structure.

Reported-by: Michael Cree <mcree@orcon.net.nz>
Cc: stable@kernel.org (v2.6.38)
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoprune back iprune_sem
Christoph Hellwig [Tue, 15 Mar 2011 20:51:24 +0000 (21:51 +0100)]
prune back iprune_sem

iprune_sem is continously giving us lockdep warnings because we do take it in
read mode in the reclaim path, but we're also doing non-NOFS allocations under
it taken in write mode.

Taking a bit deeper look at it I think it's fixable quite trivially:

 - for invalidate_inodes we do not need iprune_sem at all.  We have an active
   reference on the superblock, so the filesystem is not going away until it
   has finished.
 - for evict_inodes we do need it, to make sure prune_icache has done it's
   work before we tear down the superblock.  But there is no reason to
   hold it over the actual reclaim operation - it's enough to cycle through
   it after the actual reclaim to make sure we wait for any pending
   prune_icache to complete.  We just have to remove the WARN_ON for
   otherwise busy inodes as they can actually happen now.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
13 years agovfs: add nonconflicting values for O_PATH
Stephen Rothwell [Wed, 16 Mar 2011 07:09:27 +0000 (18:09 +1100)]
vfs: add nonconflicting values for O_PATH

[AV: on architectures where default conflicts with existing
flags, that is]

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
13 years agox86, AMD: Set ARAT feature on AMD processors
Boris Ostrovsky [Tue, 15 Mar 2011 16:13:44 +0000 (12:13 -0400)]
x86, AMD: Set ARAT feature on AMD processors

Support for Always Running APIC timer (ARAT) was introduced in
commit db954b5898dd3ef3ef93f4144158ea8f97deb058. This feature
allows us to avoid switching timers from LAPIC to something else
(e.g. HPET) and go into timer broadcasts when entering deep
C-states.

AMD processors don't provide a CPUID bit for that feature but
they also keep APIC timers running in deep C-states (except for
cases when the processor is affected by erratum 400). Therefore
we should set ARAT feature bit on AMD CPUs.

Tested-by: Borislav Petkov <borislav.petkov@amd.com>
Acked-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Acked-by: Mark Langsdorf <mark.langsdorf@amd.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@amd.com>
LKML-Reference: <1300205624-4813-1-git-send-email-ostr@amd64.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
13 years agox86, quirk: Fix SB600 revision check
Andreas Herrmann [Tue, 15 Mar 2011 14:31:37 +0000 (15:31 +0100)]
x86, quirk: Fix SB600 revision check

Commit 7f74f8f28a2bd9db9404f7d364e2097a0c42cc12
(x86 quirk: Fix polarity for IRQ0 pin2 override on SB800
systems) introduced a regression. It removed some SB600 specific
code to determine the revision ID without adapting a
corresponding revision ID check for SB600.

See this mail thread:

  http://marc.info/?l=linux-kernel&m=129980296006380&w=2

This patch adapts the corresponding check to cover all SB600
revisions.

Tested-by: Wang Lei <f3d27b@gmail.com>
Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: stable@kernel.org # 38.x, 37.x, 32.x
LKML-Reference: <20110315143137.GD29499@alberich.amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
13 years agofix follow_link() breakage
Al Viro [Wed, 16 Mar 2011 06:45:02 +0000 (02:45 -0400)]
fix follow_link() breakage

commit 574197e0de46a8a4db5c54ef7b65e43ffa8873a7 had a missing
piece, breaking the loop detection ;-/

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
13 years agoMerge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Wed, 16 Mar 2011 03:01:36 +0000 (20:01 -0700)]
Merge branch 'x86-platform-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (27 commits)
  x86: Clean up apic.c and apic.h
  x86: Remove superflous goal definition of tsc_sync
  x86: dt: Correct local apic documentation in device tree bindings
  x86: dt: Cleanup local apic setup
  x86: dt: Fix OLPC=y/INTEL_CE=n build
  rtc: cmos: Add OF bindings
  x86: ce4100: Use OF to setup devices
  x86: ioapic: Add OF bindings for IO_APIC
  x86: dtb: Add generic bus probe
  x86: dtb: Add support for PCI devices backed by dtb nodes
  x86: dtb: Add device tree support for HPET
  x86: dtb: Add early parsing of IO_APIC
  x86: dtb: Add irq domain abstraction
  x86: dtb: Add a device tree for CE4100
  x86: Add device tree support
  x86: e820: Remove conditional early mapping in parse_e820_ext
  x86: OLPC: Make OLPC=n build again
  x86: OLPC: Remove extra OLPC_OPENFIRMWARE_DT indirection
  x86: OLPC: Cleanup config maze completely
  x86: OLPC: Hide OLPC_OPENFIRMWARE config switch
  ...

Fix up conflicts in arch/x86/platform/ce4100/ce4100.c

13 years agoMerge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Wed, 16 Mar 2011 02:49:10 +0000 (19:49 -0700)]
Merge branch 'x86-mm-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (93 commits)
  x86, tlb, UV: Do small micro-optimization for native_flush_tlb_others()
  x86-64, NUMA: Don't call numa_set_distanc() for all possible node combinations during emulation
  x86-64, NUMA: Don't assume phys node 0 is always online in numa_emulation()
  x86-64, NUMA: Clean up initmem_init()
  x86-64, NUMA: Fix numa_emulation code with node0 without RAM
  x86-64, NUMA: Revert NUMA affine page table allocation
  x86: Work around old gas bug
  x86-64, NUMA: Better explain numa_distance handling
  x86-64, NUMA: Fix distance table handling
  mm: Move early_node_map[] reverse scan helpers under HAVE_MEMBLOCK
  x86-64, NUMA: Fix size of numa_distance array
  x86: Rename e820_table_* to pgt_buf_*
  bootmem: Move __alloc_memory_core_early() to nobootmem.c
  bootmem: Move contig_page_data definition to bootmem.c/nobootmem.c
  bootmem: Separate out CONFIG_NO_BOOTMEM code into nobootmem.c
  x86-64, NUMA: Seperate out numa_alloc_distance() from numa_set_distance()
  x86-64, NUMA: Add proper function comments to global functions
  x86-64, NUMA: Move NUMA emulation into numa_emulation.c
  x86-64, NUMA: Prepare numa_emulation() for moving NUMA emulation into a separate file
  x86-64, NUMA: Do not scan two times for setup_node_bootmem()
  ...

Fix up conflicts in arch/x86/kernel/smpboot.c

13 years agoMerge branch 'x86-mem-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Wed, 16 Mar 2011 02:41:42 +0000 (19:41 -0700)]
Merge branch 'x86-mem-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'x86-mem-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86-64, mem: Convert memmove() to assembly file and fix return value bug

13 years agoMerge branch 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Wed, 16 Mar 2011 02:40:53 +0000 (19:40 -0700)]
Merge branch 'x86-microcode-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, microcode, AMD: Fix signedness bug in generic_load_microcode()
  x86, microcode, AMD: Extend ucode size verification
  x86, microcode, AMD: Cleanup dmesg output
  x86, microcode, AMD: Remove unneeded memset call
  x86, microcode, AMD: Simplify get_next_ucode
  x86, microcode, AMD: Simplify install_equiv_cpu_table
  x86, microcode, AMD: Release firmware on error
  x86, microcode: Correct sysdev_add error path

13 years agoMerge branch 'um-irq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Wed, 16 Mar 2011 02:40:35 +0000 (19:40 -0700)]
Merge branch 'um-irq-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'um-irq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  um: Select GENERIC_HARDIRQS_NO_DEPRECATED
  um: Use proper accessors in show_interrupts()
  um: Convert irq_chips to new functions
  um: Remove stale irq_chip.end

13 years agoMerge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Wed, 16 Mar 2011 02:23:40 +0000 (19:23 -0700)]
Merge branch 'irq-core-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (116 commits)
  x86: Enable forced interrupt threading support
  x86: Mark low level interrupts IRQF_NO_THREAD
  x86: Use generic show_interrupts
  x86: ioapic: Avoid redundant lookup of irq_cfg
  x86: ioapic: Use new move_irq functions
  x86: Use the proper accessors in fixup_irqs()
  x86: ioapic: Use irq_data->state
  x86: ioapic: Simplify irq chip and handler setup
  x86: Cleanup the genirq name space
  genirq: Add chip flag to force mask on suspend
  genirq: Add desc->irq_data accessor
  genirq: Add comments to Kconfig switches
  genirq: Fixup fasteoi handler for oneshot mode
  genirq: Provide forced interrupt threading
  sched: Switch wait_task_inactive to schedule_hrtimeout()
  genirq: Add IRQF_NO_THREAD
  genirq: Allow shared oneshot interrupts
  genirq: Prepare the handling of shared oneshot interrupts
  genirq: Make warning in handle_percpu_event useful
  x86: ioapic: Move trigger defines to io_apic.h
  ...

Fix up trivial(?) conflicts in arch/x86/pci/xen.c due to genirq name
space changes clashing with the Xen cleanups.  The set_irq_msi() had
moved to xen_bind_pirq_msi_to_irq().

13 years agoMerge branch 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Wed, 16 Mar 2011 02:16:00 +0000 (19:16 -0700)]
Merge branch 'x86-debug-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Combine printk()s in show_regs_common()
  x86: Don't call dump_stack() from arch_trigger_all_cpu_backtrace_handler()

13 years agoMerge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Wed, 16 Mar 2011 02:00:53 +0000 (19:00 -0700)]
Merge branch 'x86-cpu-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Fix and clean up generic_processor_info()
  x86: Don't copy per_cpu cpuinfo for BSP two times
  x86: Move llc_shared_map out of cpu_info

13 years agoMerge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Wed, 16 Mar 2011 01:59:56 +0000 (18:59 -0700)]
Merge branch 'x86-asm-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, binutils, xen: Fix another wrong size directive
  x86: Remove dead config option X86_CPU
  x86: Really print supported CPUs if PROCESSOR_SELECT=y
  x86: Fix a bogus unwind annotation in lib/semaphore_32.S
  um, x86-64: Fix UML build after adding CFI annotations to lib/rwsem_64.S
  x86: Remove unused bits from lib/thunk_*.S
  x86: Use {push,pop}_cfi in more places
  x86-64: Add CFI annotations to lib/rwsem_64.S
  x86, asm: Cleanup unnecssary macros in asm-offsets.c
  x86, system.h: Drop unused __SAVE/__RESTORE macros
  x86: Use bitmap library functions
  x86: Partly unify asm-offsets_{32,64}.c
  x86: Reduce back the alignment of the per-CPU data section

13 years agoMerge branch 'timers-rtc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Wed, 16 Mar 2011 01:59:21 +0000 (18:59 -0700)]
Merge branch 'timers-rtc-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'timers-rtc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  RTC: Fix up rtc.txt documentation to reflect changes to generic rtc layer
  RTC: sa1100: Update the sa1100 RTC driver.
  RTC: Fix the cross interrupt issue on rtc-test.
  RTC: Remove UIE and PIE information from the sa1100 driver proc.
  RTC: Include information about UIE and PIE in RTC driver proc.
  RTC: Clean out UIE icotl implementations
  RTC: Cleanup rtc_class_ops->update_irq_enable()
  RTC: Cleanup rtc_class_ops->irq_set_freq()
  RTC: Cleanup rtc_class_ops->irq_set_state
  RTC: Initialize kernel state from RTC

13 years agoMerge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Wed, 16 Mar 2011 01:53:35 +0000 (18:53 -0700)]
Merge branch 'timers-core-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (62 commits)
  posix-clocks: Check write permissions in posix syscalls
  hrtimer: Remove empty hrtimer_init_hres_timer()
  hrtimer: Update hrtimer->state documentation
  hrtimer: Update base[CLOCK_BOOTTIME].offset correctly
  timers: Export CLOCK_BOOTTIME via the posix timers interface
  timers: Add CLOCK_BOOTTIME hrtimer base
  time: Extend get_xtime_and_monotonic_offset() to also return sleep
  time: Introduce get_monotonic_boottime and ktime_get_boottime
  hrtimers: extend hrtimer base code to handle more then 2 clockids
  ntp: Remove redundant and incorrect parameter check
  mn10300: Switch do_timer() to xtimer_update()
  posix clocks: Introduce dynamic clocks
  posix-timers: Cleanup namespace
  posix-timers: Add support for fd based clocks
  x86: Add clock_adjtime for x86
  posix-timers: Introduce a syscall for clock tuning.
  time: Splitout compat timex accessors
  ntp: Add ADJ_SETOFFSET mode bit
  time: Introduce timekeeping_inject_offset
  posix-timer: Update comment
  ...

Fix up new system-call-related conflicts in
arch/x86/ia32/ia32entry.S
arch/x86/include/asm/unistd_32.h
arch/x86/include/asm/unistd_64.h
arch/x86/kernel/syscall_table_32.S
(name_to_handle_at()/open_by_handle_at() vs clock_adjtime()), and some
due to movement of get_jiffies_64() in:
kernel/time.c

13 years agoMerge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Wed, 16 Mar 2011 01:37:30 +0000 (18:37 -0700)]
Merge branch 'sched-core-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (26 commits)
  sched: Resched proper CPU on yield_to()
  sched: Allow users with sufficient RLIMIT_NICE to change from SCHED_IDLE policy
  sched: Allow SCHED_BATCH to preempt SCHED_IDLE tasks
  sched: Clean up the IRQ_TIME_ACCOUNTING code
  sched: Add #ifdef around irq time accounting functions
  sched, autogroup: Stop claiming ownership of the root task group
  sched, autogroup: Stop going ahead if autogroup is disabled
  sched, autogroup, sysctl: Use proc_dointvec_minmax() instead
  sched: Fix the group_imb logic
  sched: Clean up some f_b_g() comments
  sched: Clean up remnants of sd_idle
  sched: Wholesale removal of sd_idle logic
  sched: Add yield_to(task, preempt) functionality
  sched: Use a buddy to implement yield_task_fair()
  sched: Limit the scope of clear_buddies
  sched: Check the right ->nr_running in yield_task_fair()
  sched: Avoid expensive initial update_cfs_load(), on UP too
  sched: Fix switch_from_fair()
  sched: Simplify the idle scheduling class
  softirqs: Account ksoftirqd time as cpustat softirq
  ...

13 years agoMerge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Wed, 16 Mar 2011 01:31:30 +0000 (18:31 -0700)]
Merge branch 'perf-core-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (184 commits)
  perf probe: Clean up probe_point_lazy_walker() return value
  tracing: Fix irqoff selftest expanding max buffer
  tracing: Align 4 byte ints together in struct tracer
  tracing: Export trace_set_clr_event()
  tracing: Explain about unstable clock on resume with ring buffer warning
  ftrace/graph: Trace function entry before updating index
  ftrace: Add .ref.text as one of the safe areas to trace
  tracing: Adjust conditional expression latency formatting.
  tracing: Fix event alignment: skb:kfree_skb
  tracing: Fix event alignment: mce:mce_record
  tracing: Fix event alignment: kvm:kvm_hv_hypercall
  tracing: Fix event alignment: module:module_request
  tracing: Fix event alignment: ftrace:context_switch and ftrace:wakeup
  tracing: Remove lock_depth from event entry
  perf header: Stop using 'self'
  perf session: Use evlist/evsel for managing perf.data attributes
  perf top: Don't let events to eat up whole header line
  perf top: Fix events overflow in top command
  ring-buffer: Remove unused #include <linux/trace_irq.h>
  tracing: Add an 'overwrite' trace_option.
  ...

13 years agoMerge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Wed, 16 Mar 2011 01:28:30 +0000 (18:28 -0700)]
Merge branch 'core-locking-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  rtmutex: tester: Remove the remaining BKL leftovers
  lockdep/timers: Explain in detail the locking problems del_timer_sync() may cause
  rtmutex: Simplify PI algorithm and make highest prio task get lock
  rwsem: Remove redundant asmregparm annotation
  rwsem: Move duplicate function prototypes to linux/rwsem.h
  rwsem: Unify the duplicate rwsem_is_locked() inlines
  rwsem: Move duplicate init macros and functions to linux/rwsem.h
  rwsem: Move duplicate struct rwsem declaration to linux/rwsem.h
  x86: Cleanup rwsem_count_t typedef
  rwsem: Cleanup includes
  locking: Remove deprecated lock initializers
  cred: Replace deprecated spinlock initialization
  kthread: Replace deprecated spinlock initialization
  xtensa: Replace deprecated spinlock initialization
  um: Replace deprecated spinlock initialization
  sparc: Replace deprecated spinlock initialization
  mips: Replace deprecated spinlock initialization
  cris: Replace deprecated spinlock initialization
  alpha: Replace deprecated spinlock initialization
  rtmutex-tester: Remove BKL tests

13 years agoMerge branch 'core-futexes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Wed, 16 Mar 2011 01:23:52 +0000 (18:23 -0700)]
Merge branch 'core-futexes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'core-futexes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  arm: Remove bogus comment in futex_atomic_cmpxchg_inatomic()
  futex: Deobfuscate handle_futex_death()
  plist: Add priority list test
  plist: Shrink struct plist_head
  futex,plist: Remove debug lock assignment from plist_node
  futex,plist: Pass the real head of the priority list to plist_del()
  futex: Sanitize futex ops argument types
  futex: Sanitize cmpxchg_futex_value_locked API
  futex: Remove redundant pagefault_disable in futex_atomic_cmpxchg_inatomic()
  futex: Avoid redudant evaluation of task_pid_vnr()
  futex: Update futex_wait_setup comments about locking

13 years agoMerge branch 'core-debugobjects-for-linus' of git://git.kernel.org/pub/scm/linux...
Linus Torvalds [Wed, 16 Mar 2011 01:23:25 +0000 (18:23 -0700)]
Merge branch 'core-debugobjects-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'core-debugobjects-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  debugobjects: Add hint for better object identification

13 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
Linus Torvalds [Tue, 15 Mar 2011 22:48:13 +0000 (15:48 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (57 commits)
  tidy the trailing symlinks traversal up
  Turn resolution of trailing symlinks iterative everywhere
  simplify link_path_walk() tail
  Make trailing symlink resolution in path_lookupat() iterative
  update nd->inode in __do_follow_link() instead of after do_follow_link()
  pull handling of one pathname component into a helper
  fs: allow AT_EMPTY_PATH in linkat(), limit that to CAP_DAC_READ_SEARCH
  Allow passing O_PATH descriptors via SCM_RIGHTS datagrams
  readlinkat(), fchownat() and fstatat() with empty relative pathnames
  Allow O_PATH for symlinks
  New kind of open files - "location only".
  ext4: Copy fs UUID to superblock
  ext3: Copy fs UUID to superblock.
  vfs: Export file system uuid via /proc/<pid>/mountinfo
  unistd.h: Add new syscalls numbers to asm-generic
  x86: Add new syscalls for x86_64
  x86: Add new syscalls for x86_32
  fs: Remove i_nlink check from file system link callback
  fs: Don't allow to create hardlink for deleted file
  vfs: Add open by file handle support
  ...

13 years agoVFS: Fix the nfs sillyrename regression in kernel 2.6.38
Trond Myklebust [Tue, 15 Mar 2011 17:36:43 +0000 (13:36 -0400)]
VFS: Fix the nfs sillyrename regression in kernel 2.6.38

The new vfs locking scheme introduced in 2.6.38 breaks NFS sillyrename
because the latter relies on being able to determine the parent
directory of the dentry in the ->iput() callback in order to send the
appropriate unlink rpc call.

Looking at the code that cares about races with dput(), there doesn't
seem to be anything that specifically uses d_parent as a test for
whether or not there is a race:
  - __d_lookup_rcu(), __d_lookup() all test for d_hashed() after d_parent
  - shrink_dcache_for_umount() is safe since nothing else can rearrange
    the dentries in that super block.
  - have_submount(), select_parent() and d_genocide() can test for a
    deletion if we set the DCACHE_DISCONNECTED flag when the dentry
    is removed from the parent's d_subdirs list.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@kernel.org (2.6.38, needs commit c826cb7dfce8 "dcache.c:
create helper function for duplicated functionality" )
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoMerge branch 'next' into for-linus
James Morris [Tue, 15 Mar 2011 22:41:17 +0000 (09:41 +1100)]
Merge branch 'next' into for-linus

13 years agodcache.c: create helper function for duplicated functionality
Linus Torvalds [Tue, 15 Mar 2011 22:29:21 +0000 (15:29 -0700)]
dcache.c: create helper function for duplicated functionality

This creates a helper function for he "try to ascend into the parent
directory" case, which was written out in triplicate before.  With all
the locking and subtle sequence number stuff, we really don't want to
duplicate that kind of code.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agotidy the trailing symlinks traversal up
Al Viro [Tue, 15 Mar 2011 02:20:34 +0000 (22:20 -0400)]
tidy the trailing symlinks traversal up

* pull the handling of current->total_link_count into
__do_follow_link()
* put the common "do ->put_link() if needed and path_put() the link"
  stuff into a helper (put_link(nd, link, cookie))
* rename __do_follow_link() to follow_link(), while we are at it

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
13 years agoTurn resolution of trailing symlinks iterative everywhere
Al Viro [Tue, 15 Mar 2011 01:54:55 +0000 (21:54 -0400)]
Turn resolution of trailing symlinks iterative everywhere

The last remaining place (resolution of nested symlink) converted
to the loop of the same kind we have in path_lookupat() and
path_openat().

Note that we still *do* have a recursion in pathname resolution;
can't avoid it, really.  However, it's strictly for nested symlinks
now - i.e. ones in the middle of a pathname.

link_path_walk() has lost the tail now - it always walks everything
except the last component.

do_follow_link() renamed to nested_symlink() and moved down.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
13 years agosimplify link_path_walk() tail
Al Viro [Tue, 15 Mar 2011 01:28:04 +0000 (21:28 -0400)]
simplify link_path_walk() tail

Now that link_path_walk() is called without LOOKUP_PARENT
only from do_follow_link(), we can simplify the checks in
last component handling.  First of all, checking if we'd
arrived to a directory is not needed - the caller will check
it anyway.  And LOOKUP_FOLLOW is guaranteed to be there,
since we only get to that place with nd->depth > 0.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
13 years agoMake trailing symlink resolution in path_lookupat() iterative
Al Viro [Mon, 14 Mar 2011 23:54:59 +0000 (19:54 -0400)]
Make trailing symlink resolution in path_lookupat() iterative

Now the only caller of link_path_walk() that does *not* pass
LOOKUP_PARENT is do_follow_link()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
13 years agoupdate nd->inode in __do_follow_link() instead of after do_follow_link()
Al Viro [Tue, 15 Mar 2011 00:01:51 +0000 (20:01 -0400)]
update nd->inode in __do_follow_link() instead of after do_follow_link()

... and note that we only need to do it for LAST_BIND symlinks

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
13 years agopull handling of one pathname component into a helper
Al Viro [Sun, 13 Mar 2011 23:58:58 +0000 (19:58 -0400)]
pull handling of one pathname component into a helper

new helper: walk_component().  Handles everything except symlinks;
returns negative on error, 0 on success and 1 on symlinks we decided
to follow.  Drops out of RCU mode on such symlinks.

link_path_walk() and do_last() switched to using that.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
13 years agofs: allow AT_EMPTY_PATH in linkat(), limit that to CAP_DAC_READ_SEARCH
Aneesh Kumar K.V [Sat, 29 Jan 2011 13:13:42 +0000 (18:43 +0530)]
fs: allow AT_EMPTY_PATH in linkat(), limit that to CAP_DAC_READ_SEARCH

We don't want to allow creation of private hardlinks by different application
using the fd passed to them via SCM_RIGHTS. So limit the null relative name
usage in linkat syscall to CAP_DAC_READ_SEARCH

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
13 years agoperf probe: Clean up probe_point_lazy_walker() return value
Ingo Molnar [Tue, 15 Mar 2011 19:51:09 +0000 (20:51 +0100)]
perf probe: Clean up probe_point_lazy_walker() return value

Newer compilers (gcc 4.6) complains about:

        return ret < 0 ?: 0;

For the following reason:

  util/probe-finder.c: In function â€˜probe_point_lazy_walker’:
  util/probe-finder.c:1331:18: error: the omitted middle operand in ?: will always be â€˜true’, suggest explicit middle operand [-Werror=parentheses]

And indeed the return value is a somewhat obscure (but correct) value
of 'true', so return 'ret' instead - this is cleaner and unconfuses
GCC as well.

Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
13 years agoMerge branch 'for-linus' of git://xenbits.xen.org/people/sstabellini/linux-pvhvm
Linus Torvalds [Tue, 15 Mar 2011 17:59:09 +0000 (10:59 -0700)]
Merge branch 'for-linus' of git://xenbits.xen.org/people/sstabellini/linux-pvhvm

* 'for-linus' of git://xenbits.xen.org/people/sstabellini/linux-pvhvm:
  xen: suspend: remove xen_hvm_suspend
  xen: suspend: pull pre/post suspend hooks out into suspend_info
  xen: suspend: move arch specific pre/post suspend hooks into generic hooks
  xen: suspend: refactor non-arch specific pre/post suspend hooks
  xen: suspend: add "arch" to pre/post suspend hooks
  xen: suspend: pass extra hypercall argument via suspend_info struct
  xen: suspend: refactor cancellation flag into a structure
  xen: suspend: use HYPERVISOR_suspend for PVHVM case instead of open coding
  xen: switch to new schedop hypercall by default.
  xen: use new schedop interface for suspend
  xen: do not respond to unknown xenstore control requests
  xen: fix compile issue if XEN is enabled but XEN_PVHVM is disabled
  xen: PV on HVM: support PV spinlocks and IPIs
  xen: make the ballon driver work for hvm domains
  xen-blkfront: handle Xen major numbers other than XENVBD
  xen: do not use xen_info on HVM, set pv_info name to "Xen HVM"
  xen: no need to delay xen_setup_shutdown_event for hvm guests anymore

13 years agoMerge branches 'cma', 'cxgb4', 'ipath' and 'qib' into for-next
Roland Dreier [Tue, 15 Mar 2011 17:58:04 +0000 (10:58 -0700)]
Merge branches 'cma', 'cxgb4', 'ipath' and 'qib' into for-next

13 years agoRDMA/cma: Replace global lock in rdma_destroy_id() with id-specific one
Sean Hefty [Wed, 23 Feb 2011 17:05:39 +0000 (09:05 -0800)]
RDMA/cma: Replace global lock in rdma_destroy_id() with id-specific one

rdma_destroy_id currently uses the global rdma cm 'lock' to test if an
rdma_cm_id has been bound to a device.  This prevents an active
address resolution callback handler from assigning a device to the
rdma_cm_id after rdma_destroy_id checks for one.

Instead, we can replace the use of the global lock around the check to
the rdma_cm_id device pointer by setting the id state to destroying,
then flushing all active callbacks.  The latter is accomplished by
acquiring and releasing the handler_mutex.  Any active handler will
complete first, and any newly scheduled handlers will find the
rdma_cm_id in an invalid state.

In addition to optimizing the current locking scheme, the use of the
rdma_cm_id mutex is a more intuitive synchronization mechanism than
that of the global lock.  These changes are based on feedback from
Doug Ledford <dledford@redhat.com> while he was trying to debug a
crash in the rdma cm destroy path.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
13 years agoIB/cm: Cancel pending LAP message when exiting IB_CM_ESTABLISH state
Sean Hefty [Thu, 3 Mar 2011 23:31:06 +0000 (23:31 +0000)]
IB/cm: Cancel pending LAP message when exiting IB_CM_ESTABLISH state

This problem was reported by Moni Shoua <monis@mellanox.com> and Amir
Vadai <amirv@mellanox.com>:

When destroying a cm_id from a context of a work queue and if
the lap_state of this cm_id is IB_CM_LAP_SENT, we need to
release the reference of this id that was taken upon the send
of the LAP message.  Otherwise, if the expected APR message
gets lost, it is only after a long time that the reference
will be released, while during that the work handler thread is
not available to process other things.

It turns out that we need to cancel any pending LAP messages whenever
we transition out of the IB_CM_ESTABLISH state.  This occurs when
disconnecting - either sending or receiving a DREQ.  It can also
happen in a corner case where we receive a REJ message after sending
an RTU, followed by a LAP.  Add checks and cancel any outstanding LAP
messages in these three cases.

Canceling the LAP when sending a DREQ fixes the destroy problem
reported by Moni.  When a cm_id is destroyed in the IB_CM_ESTABLISHED
state, it sends a DREQ to the remote side to notify the peer that the
connection is going away.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
13 years agoIB/cm: Bump reference count on cm_id before invoking callback
Sean Hefty [Wed, 23 Feb 2011 16:17:40 +0000 (08:17 -0800)]
IB/cm: Bump reference count on cm_id before invoking callback

When processing a SIDR REQ, the ib_cm allocates a new cm_id.  The
refcount of the cm_id is initialized to 1.  However, cm_process_work
will decrement the refcount after invoking all callbacks.  The result
is that the cm_id will end up with refcount set to 0 by the end of the
sidr req handler.

If a user tries to destroy the cm_id, the destruction will proceed,
under the incorrect assumption that no other threads are referencing
the cm_id.  This can lead to a crash when the cm callback thread tries
to access the cm_id.

This problem was noticed as part of a larger investigation with kernel
crashes in the rdma_cm when running on a real time OS.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Acked-by: Doug Ledford <dledford@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
13 years agoMerge branches 'stable/ia64', 'stable/blkfront-cleanup' and 'stable/cleanup' of git...
Linus Torvalds [Tue, 15 Mar 2011 17:49:16 +0000 (10:49 -0700)]
Merge branches 'stable/ia64', 'stable/blkfront-cleanup' and 'stable/cleanup' of git://git./linux/kernel/git/konrad/xen

* 'stable/ia64' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen: ia64 build broken due to "xen: switch to new schedop hypercall by default."

* 'stable/blkfront-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen: Union the blkif_request request specific fields

* 'stable/cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen: annotate functions which only call into __init at start of day
  xen p2m: annotate variable which appears unused
  xen: events: mark cpu_evtchn_mask_p as __refdata

13 years agoMerge branch 'stable/irq.cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Tue, 15 Mar 2011 17:47:56 +0000 (10:47 -0700)]
Merge branch 'stable/irq.cleanup' of git://git./linux/kernel/git/konrad/xen

* 'stable/irq.cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen: events: remove dom0 specific xen_create_msi_irq
  xen: events: use xen_bind_pirq_msi_to_irq from xen_create_msi_irq
  xen: events: push set_irq_msi down into xen_create_msi_irq
  xen: events: update pirq_to_irq in xen_create_msi_irq
  xen: events: refactor xen_create_msi_irq slightly
  xen: events: separate MSI PIRQ allocation from PIRQ binding to IRQ
  xen: events: assume PHYSDEVOP_get_free_pirq exists
  xen: pci: collapse apic_register_gsi_xen_hvm and xen_hvm_register_pirq
  xen: events: return irq from xen_allocate_pirq_msi
  xen: events: drop XEN_ALLOC_IRQ flag to xen_allocate_pirq_msi
  xen: events: do not leak IRQ from xen_allocate_pirq_msi when no pirq available.
  xen: pci: only define xen_initdom_setup_msi_irqs if CONFIG_XEN_DOM0

13 years agoMerge branches 'stable/irq.rework' and 'stable/pcifront-fixes' of git://git.kernel...
Linus Torvalds [Tue, 15 Mar 2011 17:47:16 +0000 (10:47 -0700)]
Merge branches 'stable/irq.rework' and 'stable/pcifront-fixes' of git://git./linux/kernel/git/konrad/xen

* 'stable/irq.rework' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen/irq: Cleanup up the pirq_to_irq for DomU PV PCI passthrough guests as well.
  xen: Use IRQF_FORCE_RESUME
  xen/timer: Missing IRQF_NO_SUSPEND in timer code broke suspend.
  xen: Fix compile error introduced by "switch to new irq_chip functions"
  xen: Switch to new irq_chip functions
  xen: Remove stale irq_chip.end
  xen: events: do not free legacy IRQs
  xen: events: allocate GSIs and dynamic IRQs from separate IRQ ranges.
  xen: events: add xen_allocate_irq_{dynamic, gsi} and xen_free_irq
  xen:events: move find_unbound_irq inside CONFIG_PCI_MSI
  xen: handled remapped IRQs when enabling a pcifront PCI device.
  genirq: Add IRQF_FORCE_RESUME

* 'stable/pcifront-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  pci/xen: When free-ing MSI-X/MSI irq->desc also use generic code.
  pci/xen: Cleanup: convert int** to int[]
  pci/xen: Use xen_allocate_pirq_msi instead of xen_allocate_pirq
  xen-pcifront: Sanity check the MSI/MSI-X values
  xen-pcifront: don't use flush_scheduled_work()

13 years agoMerge branches 'stable/p2m-identity.v4.9.1' and 'stable/e820' of git://git.kernel...
Linus Torvalds [Tue, 15 Mar 2011 17:32:15 +0000 (10:32 -0700)]
Merge branches 'stable/p2m-identity.v4.9.1' and 'stable/e820' of git://git./linux/kernel/git/konrad/xen

* 'stable/p2m-identity.v4.9.1' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen/m2p: Check whether the MFN has IDENTITY_FRAME bit set..
  xen/m2p: No need to catch exceptions when we know that there is no RAM
  xen/debug: WARN_ON when identity PFN has no _PAGE_IOMAP flag set.
  xen/debugfs: Add 'p2m' file for printing out the P2M layout.
  xen/setup: Set identity mapping for non-RAM E820 and E820 gaps.
  xen/mmu: WARN_ON when racing to swap middle leaf.
  xen/mmu: Set _PAGE_IOMAP if PFN is an identity PFN.
  xen/mmu: Add the notion of identity (1-1) mapping.
  xen: Mark all initial reserved pages for the balloon as INVALID_P2M_ENTRY.

* 'stable/e820' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen/e820: Don't mark balloon memory as E820_UNUSABLE when running as guest and fix overflow.
  xen/setup: Inhibit resource API from using System RAM E820 gaps as PCI mem gaps.

13 years agoRDMA/cma: Fix crash in request handlers
Sean Hefty [Wed, 23 Feb 2011 16:11:32 +0000 (08:11 -0800)]
RDMA/cma: Fix crash in request handlers

Doug Ledford and Red Hat reported a crash when running the rdma_cm on
a real-time OS.  The crash has the following call trace:

    cm_process_work
       cma_req_handler
          cma_disable_callback
          rdma_create_id
             kzalloc
             init_completion
          cma_get_net_info
          cma_save_net_info
          cma_any_addr
             cma_zero_addr
          rdma_translate_ip
             rdma_copy_addr
          cma_acquire_dev
             rdma_addr_get_sgid
             ib_find_cached_gid
             cma_attach_to_dev
          ucma_event_handler
             kzalloc
             ib_copy_ah_attr_to_user
          cma_comp

[ preempted ]

    cma_write
        copy_from_user
        ucma_destroy_id
           copy_from_user
           _ucma_find_context
           ucma_put_ctx
           ucma_free_ctx
              rdma_destroy_id
                 cma_exch
                 cma_cancel_operation
                 rdma_node_get_transport

        rt_mutex_slowunlock
        bad_area_nosemaphore
        oops_enter

They were able to reproduce the crash multiple times with the
following details:

    Crash seems to always happen on the:
            mutex_unlock(&conn_id->handler_mutex);
    as conn_id looks to have been freed during this code path.

An examination of the code shows that a race exists in the request
handlers.  When a new connection request is received, the rdma_cm
allocates a new connection identifier.  This identifier has a single
reference count on it.  If a user calls rdma_destroy_id() from another
thread after receiving a callback, rdma_destroy_id will proceed to
destroy the id and free the associated memory.  However, the request
handlers may still be in the process of running.  When control returns
to the request handlers, they can attempt to access the newly created
identifiers.

Fix this by holding a reference on the newly created rdma_cm_id until
the request handler is through accessing it.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Acked-by: Doug Ledford <dledford@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
13 years agox86: stop_machine_text_poke() should issue sync_core()
Mathieu Desnoyers [Thu, 3 Mar 2011 16:01:37 +0000 (11:01 -0500)]
x86: stop_machine_text_poke() should issue sync_core()

Intel Archiecture Software Developer's Manual section 7.1.3 specifies that a
core serializing instruction such as "cpuid" should be executed on _each_ core
before the new instruction is made visible.

Failure to do so can lead to unspecified behavior (Intel XMC erratas include
General Protection Fault in the list), so we should avoid this at all cost.

This problem can affect modified code executed by interrupt handlers after
interrupt are re-enabled at the end of stop_machine, because no core serializing
instruction is executed between the code modification and the moment interrupts
are reenabled.

Because stop_machine_text_poke performs the text modification from the first CPU
decrementing stop_machine_first, modified code executed in thread context is
also affected by this problem. To explain why, we have to split the CPUs in two
categories: the CPU that initiates the text modification (calls text_poke_smp)
and all the others. The scheduler, executed on all other CPUs after
stop_machine, issues an "iret" core serializing instruction, and therefore
handles core serialization for all these CPUs. However, the text modification
initiator can continue its execution on the same thread and access the modified
text without any scheduler call. Given that the CPU that initiates the code
modification is not guaranteed to be the one actually performing the code
modification, it falls into the XMC errata.

Q: Isn't this executed from an IPI handler, which will return with IRET (a
   serializing instruction) anyway?
A: No, now stop_machine uses per-cpu workqueue, so that handler will be
   executed from worker threads. There is no iret anymore.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
LKML-Reference: <20110303160137.GB1590@Krystal>
Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: <stable@kernel.org>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
13 years agofs/9p: Make the writeback_fid owned by root
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:34:11 +0000 (17:04 +0530)]
fs/9p: Make the writeback_fid owned by root

Changes to make sure writeback fid is owned by root

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: Writeback dirty data before setattr
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:34:11 +0000 (17:04 +0530)]
fs/9p: Writeback dirty data before setattr

change file attribute can result in making the file readonly.
So flush the dirty pages before that.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: call vmtruncate before setattr 9p opeation
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:34:10 +0000 (17:04 +0530)]
fs/9p: call vmtruncate before setattr 9p opeation

We need to call vmtruncate before 9p setattr operation, otherwise we
could write back some dirty pages between setattr with ATTR_SIZE and vmtruncate
causing some truncated pages to be written back to server

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: Properly update inode attributes on link
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:34:09 +0000 (17:04 +0530)]
fs/9p: Properly update inode attributes on link

With caching enabled, we need to make sure we don't
update inode->i_size via stat2inode because we could
have dirty data which is not yet written to the server

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: Prevent multiple inclusion of same header
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:34:09 +0000 (17:04 +0530)]
fs/9p: Prevent multiple inclusion of same header

Add necessary #ifndef #endif blocks to avoid mulitple inclusion of same headers

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: Workaround vfs rename rehash bug
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:34:08 +0000 (17:04 +0530)]
fs/9p: Workaround vfs rename rehash bug

This is similar to what ceph, ocfs2 and nfs does
http://kerneltrap.org/mailarchive/linux-fsdevel/2008/4/18/1498534

May be we should get vfs fixed

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: Mark directory inode invalid for many directory inode operations
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:34:08 +0000 (17:04 +0530)]
fs/9p: Mark directory inode invalid for many directory inode operations

One successfull directory operation we would have changed directory
inode attribute. So mark them invalid

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: Add . and .. dentry revalidation flag
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:34:07 +0000 (17:04 +0530)]
fs/9p: Add . and .. dentry revalidation flag

We need to revalidate . and .. entries also

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: mark inode attribute invalid on rename, unlink and setattr
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:34:07 +0000 (17:04 +0530)]
fs/9p: mark inode attribute invalid on rename, unlink and setattr

rename, unlink and setattr can result in update of inode attribute.
So mark the cached copy invalid

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: Add support for marking inode attribute invalid
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:34:06 +0000 (17:04 +0530)]
fs/9p: Add support for marking inode attribute invalid

With cached mode some of the file system operation result
in updating inode attributes (ctime). Add support for
marking inode attribute invalid in such cases so that
we fetch the updated inode attribute on dentry revalidation.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: Initialize root inode number for dotl
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:34:06 +0000 (17:04 +0530)]
fs/9p: Initialize root inode number for dotl

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: Update link count correctly on different file system operations
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:34:05 +0000 (17:04 +0530)]
fs/9p: Update link count correctly on different file system operations

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: Add drop_inode 9p callback
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:34:05 +0000 (17:04 +0530)]
fs/9p: Add drop_inode 9p callback

We want to immediately drop the inode in non cached mode

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: Add direct IO support in cached mode
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:34:04 +0000 (17:04 +0530)]
fs/9p: Add direct IO support in cached mode

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: Fix inode i_size update in file_write
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:34:04 +0000 (17:04 +0530)]
fs/9p: Fix inode i_size update in file_write

Only update inode i_size when we write towards end of file.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: set default readahead pages in cached mode
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:34:03 +0000 (17:04 +0530)]
fs/9p: set default readahead pages in cached mode

We want to enable readahead in cached mode

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: Move writeback fid to v9fs_inode
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:34:03 +0000 (17:04 +0530)]
fs/9p: Move writeback fid to v9fs_inode

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: Add v9fs_inode
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:34:02 +0000 (17:04 +0530)]
fs/9p: Add v9fs_inode

Switch to the fscache code to v9fs_inode. We will later use
v9fs_inode in cache=loose mode to track the inode cache
validity timeout. Ie if we find an inode in cache older
that a specific jiffie range we will consider it stale

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: Don't set stat.st_blocks based on nrpages
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:34:01 +0000 (17:04 +0530)]
fs/9p: Don't set stat.st_blocks based on nrpages

simple_getattr does set stat.st_blocks to a value
derived from nrpages. That is not correct with 9p

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: Add inode hashing
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:34:01 +0000 (17:04 +0530)]
fs/9p: Add inode hashing

We didn't add the inode to inode hash in 9p. We need to do that
to get sync to work, otherwise __mark_inode_dirty will not
add the inode to super block's dirty list.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: We need not writeback dirty pages during close
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:34:00 +0000 (17:04 +0530)]
fs/9p: We need not writeback dirty pages during close

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: Implement syncfs call back for 9Pfs
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:34:00 +0000 (17:04 +0530)]
fs/9p: Implement syncfs call back for 9Pfs

FIXME!! what about dotu ?

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agonet/9p: Implement syncfs 9P operation
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:33:59 +0000 (17:03 +0530)]
net/9p: Implement syncfs 9P operation

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: Mark file system with MS_SYNCHRONOUS only if it is not cached mode
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:33:59 +0000 (17:03 +0530)]
fs/9p: Mark file system with MS_SYNCHRONOUS only if it is not cached mode

We should not mark file system synchronous if mounted cache=* option

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: Clarify cached dentry delete operation
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:33:58 +0000 (17:03 +0530)]
fs/9p: Clarify cached dentry delete operation

Update the comment to indicate that we don't want to cache
negative dentries.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: Add buffered write support for v9fs.
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:33:58 +0000 (17:03 +0530)]
fs/9p: Add buffered write support for v9fs.

We can now support writeable mmaps.
Based on the original patch from Badari Pulavarty <pbadari@us.ibm.com>

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: Add fid to inode in cached mode
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:33:57 +0000 (17:03 +0530)]
fs/9p: Add fid to inode in cached mode

The fid attached to inode will be opened O_RDWR mode and is used
for dirty page writeback only.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: Add read write helper function
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:33:56 +0000 (17:03 +0530)]
fs/9p: Add read write helper function

We add read write helper function here which will
be used later by the mmap patch

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: [fscache] wait for page write in cached mode
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:33:56 +0000 (17:03 +0530)]
fs/9p: [fscache] wait for page write in cached mode

We need to call fscache_wait_on_page_write in launder_page
for fscache

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: increment inode->i_count in cached mode.
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:33:55 +0000 (17:03 +0530)]
fs/9p: increment inode->i_count in cached mode.

We need to ihold even in cached mode

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: set fs cache cookie in create path also
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:33:55 +0000 (17:03 +0530)]
fs/9p: set fs cache cookie in create path also

We need to call v9fs_cache_inode_set_cookie in create
path also

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: set the cached file_operations struct during inode init
Aneesh Kumar K.V [Mon, 28 Feb 2011 11:33:54 +0000 (17:03 +0530)]
fs/9p: set the cached file_operations struct during inode init

With the old code we were not setting the file->f_op
with cached file operations during creat.

(format correction by jvrao@linux.vnet.ibm.com)

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years ago[net/9p] Small non-IO PDUs for zero-copy supporting transports.
Venkateswararao Jujjuri (JV) [Wed, 16 Feb 2011 20:54:22 +0000 (12:54 -0800)]
[net/9p] Small non-IO PDUs for zero-copy supporting transports.

If a transport prefers payload to be sent separate from the PDU
(P9_TRANS_PREF_PAYLOAD_SEP), there is no need to allocate msize
PDU buffers(struct p9_fcall).

This patch allocates only upto 4k buffers for this kind of transports
and there won't be any change to the legacy transports.

Hence, this patch on top of zero copy changes allows user to
specify higher msizes through the mount option
without hogging the kernel heap.

Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years ago[net/9p] Handle Zero Copy TREAD/RERROR case in !dotl case.
Venkateswararao Jujjuri (JV) [Wed, 2 Feb 2011 04:04:59 +0000 (20:04 -0800)]
[net/9p] Handle Zero Copy TREAD/RERROR case in !dotl case.

This takes care of copying out error buffers from user buffer
payloads when we are using zero copy.  This happens because the
only payload buffer the server has to respond to the request is
the user buffer given for the zero copy read.

Because we only use zerocopy when the amount of data to transfer
is greater than a certain size (currently 4K) and error strings are
limited to ERRMAX (currently 128) we don't need to worry about there
being sufficient space for the error to fit in the payload.

Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years ago[net/9p] readdir zerocopy changes for 9P2000.L protocol.
Venkateswararao Jujjuri (JV) [Thu, 17 Feb 2011 02:43:20 +0000 (18:43 -0800)]
[net/9p] readdir zerocopy changes for 9P2000.L protocol.

Modify p9_client_readdir() to check the transport preference and act according
If the preference is P9_TRANS_PREF_PAYLOAD_SEP, send the payload
separately instead of putting it directly on PDU.

Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>