openwrt/staging/blogic.git
9 years agonamei: move link count check and stack allocation into pick_link()
Al Viro [Mon, 4 May 2015 22:26:59 +0000 (18:26 -0400)]
namei: move link count check and stack allocation into pick_link()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agonamei: make should_follow_link() store the link in nd->link
Al Viro [Mon, 4 May 2015 22:13:23 +0000 (18:13 -0400)]
namei: make should_follow_link() store the link in nd->link

... if it decides to follow, that is.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agonamei: new calling conventions for walk_component()
Al Viro [Mon, 4 May 2015 21:47:11 +0000 (17:47 -0400)]
namei: new calling conventions for walk_component()

instead of a single flag (!= 0 => we want to follow symlinks) pass
two bits - WALK_GET (want to follow symlinks) and WALK_PUT (put_link()
once we are done looking at the name).  The latter matters only for
success exits - on failure the caller will discard everything anyway.

Suggestions for better variant are welcome; what this thing aims for
is making sure that pending put_link() is done *before* walk_component()
decides to pick a symlink up, rather than between picking it up and
acting upon it.  See the next commit for payoff.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agolink_path_walk: move the OK: inside the loop
Al Viro [Mon, 4 May 2015 12:58:35 +0000 (08:58 -0400)]
link_path_walk: move the OK: inside the loop

fewer labels that way; in particular, resuming after the end of
nested symlink is straight-line.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agonamei: have terminate_walk() do put_link() on everything left
Al Viro [Mon, 4 May 2015 12:34:59 +0000 (08:34 -0400)]
namei: have terminate_walk() do put_link() on everything left

All callers of terminate_walk() are followed by more or less
open-coded eqiuvalent of "do put_link() on everything left
in nd->stack".  Better done in terminate_walk() itself, and
when we go for RCU symlink traversal we'll have to do it
there anyway.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agonamei: take put_link() into {lookup,mountpoint,do}_last()
Al Viro [Mon, 4 May 2015 12:26:45 +0000 (08:26 -0400)]
namei: take put_link() into {lookup,mountpoint,do}_last()

rationale: we'll need to have terminate_walk() do put_link() on
everything, which will mean that in some cases ..._last() will do
put_link() anyway.  Easier to have them do it in all cases.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agonamei: lift (open-coded) terminate_walk() into callers of get_link()
Al Viro [Mon, 4 May 2015 12:15:36 +0000 (08:15 -0400)]
namei: lift (open-coded) terminate_walk() into callers of get_link()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agolift terminate_walk() into callers of walk_component()
Al Viro [Mon, 4 May 2015 11:59:30 +0000 (07:59 -0400)]
lift terminate_walk() into callers of walk_component()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agonamei: lift (open-coded) terminate_walk() in follow_dotdot_rcu() into callers
Al Viro [Mon, 4 May 2015 11:53:00 +0000 (07:53 -0400)]
namei: lift (open-coded) terminate_walk() in follow_dotdot_rcu() into callers

follow_dotdot_rcu() does an equivalent of terminate_walk() on failure;
shifting it into callers makes for simpler rules and those callers
already have terminate_walk() on other failure exits.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agonamei: we never need more than MAXSYMLINKS entries in nd->stack
Al Viro [Mon, 4 May 2015 01:30:27 +0000 (21:30 -0400)]
namei: we never need more than MAXSYMLINKS entries in nd->stack

The only reason why we needed one more was that purely nested
MAXSYMLINKS symlinks could lead to path_init() using that many
entries in addition to nd->stack[0] which it left unused.

That can't happen now - path_init() starts with entry 0 (and
trailing_symlink() is called only when we'd already encountered
one symlink, so no more than MAXSYMLINKS-1 are left).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agolink_path_walk: end of nd->depth massage
Al Viro [Mon, 4 May 2015 01:27:36 +0000 (21:27 -0400)]
link_path_walk: end of nd->depth massage

get rid of orig_depth - we only use it on error exit to tell whether
to stop doing put_link() when depth reaches 0 (call from path_init())
or when it reaches 1 (call from trailing_symlink()).  However, in
the latter case the caller would immediately follow with one more
put_link().  Just keep doing it until the depth reaches zero (and
simplify trailing_symlink() as the result).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agolink_path_walk: nd->depth massage, part 10
Al Viro [Mon, 4 May 2015 01:21:44 +0000 (21:21 -0400)]
link_path_walk: nd->depth massage, part 10

Get rid of orig_depth checks in OK: logics.  If nd->depth is
zero, we had been called from path_init() and we are done.
If it is greater than 1, we are not done, whether we'd been
called from path_init() or trailing_symlink().  And in
case when it's 1, we might have been called from path_init()
and reached the end of nested symlink (in which case
nd->stack[0].name will point to the rest of pathname and
we are not done) or from trailing_symlink(), in which case
we are done.

Just have trailing_symlink() leave NULL in nd->stack[0].name
and use that to discriminate between those cases.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agolink_path_walk: nd->depth massage, part 9
Al Viro [Mon, 4 May 2015 01:16:35 +0000 (21:16 -0400)]
link_path_walk: nd->depth massage, part 9

Make link_path_walk() work with any value of nd->depth on entry -
memorize it and use it in tests instead of comparing with 1.
Don't bother with increment/decrement in path_init().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agoput_link: nd->depth massage, part 8
Al Viro [Mon, 4 May 2015 01:06:24 +0000 (21:06 -0400)]
put_link: nd->depth massage, part 8

all calls are preceded by decrement of nd->depth; move it into
put_link() itself.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agotrailing_symlink: nd->depth massage, part 7
Al Viro [Mon, 4 May 2015 01:04:07 +0000 (21:04 -0400)]
trailing_symlink: nd->depth massage, part 7

move decrement of nd->depth on successful returns into the callers.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agoget_link: nd->depth massage, part 6
Al Viro [Mon, 4 May 2015 01:02:40 +0000 (21:02 -0400)]
get_link: nd->depth massage, part 6

make get_link() increment nd->depth on successful exit

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agotrailing_symlink: nd->depth massage, part 5
Al Viro [Mon, 4 May 2015 00:59:58 +0000 (20:59 -0400)]
trailing_symlink: nd->depth massage, part 5

move increment of ->depth to the point where we'd discovered
that get_link() has not returned an error, adjust exits
accordingly.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agolink_path_walk: nd->depth massage, part 4
Al Viro [Mon, 4 May 2015 00:54:27 +0000 (20:54 -0400)]
link_path_walk: nd->depth massage, part 4

lift increment/decrement into link_path_walk() callers.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agolink_path_walk: nd->depth massage, part 3
Al Viro [Mon, 4 May 2015 00:52:15 +0000 (20:52 -0400)]
link_path_walk: nd->depth massage, part 3

remove decrement/increment surrounding nd_alloc_stack(), adjust the
test in it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agolink_path_walk: nd->depth massage, part 2
Al Viro [Mon, 4 May 2015 00:46:54 +0000 (20:46 -0400)]
link_path_walk: nd->depth massage, part 2

collapse adjacent increment/decrement pairs.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agolink_path_walk: nd->depth massage, part 1
Al Viro [Mon, 4 May 2015 00:01:27 +0000 (20:01 -0400)]
link_path_walk: nd->depth massage, part 1

nd->stack[0] is unused until the handling of trailing symlinks and
we want to get rid of that.  Having fucked that transformation up
several times, I went for bloody pedantic series of provably equivalent
transformations.  Sorry.

Step 1: keep nd->depth higher by one in link_path_walk() - increment upon
entry, decrement on exits, adjust the arithmetics inside and surround the
calls of functions that care about nd->depth value (nd_alloc_stack(),
get_link(), put_link()) with decrement/increment pairs.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agonamei: remove restrictions on nesting depth
Al Viro [Sat, 2 May 2015 11:16:16 +0000 (07:16 -0400)]
namei: remove restrictions on nesting depth

The only restriction is that on the total amount of symlinks
crossed; how they are nested does not matter

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agonamei: trim the arguments of get_link()
Al Viro [Sun, 19 Apr 2015 04:53:50 +0000 (00:53 -0400)]
namei: trim the arguments of get_link()

same story as the previous commit

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agonamei: trim redundant arguments of fs/namei.c:put_link()
Al Viro [Sun, 3 May 2015 00:19:23 +0000 (20:19 -0400)]
namei: trim redundant arguments of fs/namei.c:put_link()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agonamei: trim redundant arguments of trailing_symlink()
Al Viro [Sat, 2 May 2015 23:48:56 +0000 (19:48 -0400)]
namei: trim redundant arguments of trailing_symlink()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agonamei: move link/cookie pairs into nameidata
Al Viro [Sat, 2 May 2015 23:38:35 +0000 (19:38 -0400)]
namei: move link/cookie pairs into nameidata

Array of MAX_NESTED_LINKS + 1 elements put into nameidata;
what used to be a local array in link_path_walk() occupies
entries 1 .. MAX_NESTED_LINKS in it, link and cookie from
the trailing symlink handling loops - entry 0.

This is _not_ the final arrangement; just an easily verified
incremental step.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agolink_path_walk: cleanup - turn goto start; into continue;
Al Viro [Sun, 19 Apr 2015 00:44:34 +0000 (20:44 -0400)]
link_path_walk: cleanup - turn goto start; into continue;

Deal with skipping leading slashes before what used to be the
recursive call.  That way we can get rid of that goto completely.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agolink_path_walk: split "return from recursive call" path
Al Viro [Sun, 19 Apr 2015 00:40:04 +0000 (20:40 -0400)]
link_path_walk: split "return from recursive call" path

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agolink_path_walk: kill the recursion
Al Viro [Sun, 19 Apr 2015 00:30:49 +0000 (20:30 -0400)]
link_path_walk: kill the recursion

absolutely straightforward now - the only variables we need to preserve
across the recursive call are name, link and cookie, and recursion depth
is limited (and can is equal to nd->depth).  So arrange an array of
triples to hold instances of those and be done with that.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agolink_path_walk: final preparations to killing recursion
Al Viro [Sun, 19 Apr 2015 00:21:40 +0000 (20:21 -0400)]
link_path_walk: final preparations to killing recursion

reduce the number of returns in there - turn all places
where it returns zero into goto OK and places where it
returns non-zero into goto Err.  The only non-trivial
detail is that all breaks in the loop are guaranteed
to be with non-zero err.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agolink_path_walk: get rid of duplication
Al Viro [Sun, 19 Apr 2015 00:14:20 +0000 (20:14 -0400)]
link_path_walk: get rid of duplication

What we do after the second walk_component() + put_link() + depth
decrement in there is exactly equivalent to what's done right
after the first walk_component().  Easy to verify and not at all
surprising, seeing that there we have just walked the last
component of nested symlink.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agolink_path_walk: massage a bit more
Al Viro [Sun, 19 Apr 2015 00:09:08 +0000 (20:09 -0400)]
link_path_walk: massage a bit more

Pull the block after the if-else in the end of what used to be do-while
body into all branches there.  We are almost done with the massage...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agolink_path_walk: turn inner loop into explicit goto
Al Viro [Sun, 19 Apr 2015 00:03:03 +0000 (20:03 -0400)]
link_path_walk: turn inner loop into explicit goto

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agolink_path_walk: don't bother with walk_component() after jumping link
Al Viro [Sat, 18 Apr 2015 23:19:01 +0000 (19:19 -0400)]
link_path_walk: don't bother with walk_component() after jumping link

... it does nothing if nd->last_type is LAST_BIND.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agolink_path_walk: handle get_link() returning ERR_PTR() immediately
Al Viro [Sat, 18 Apr 2015 23:10:36 +0000 (19:10 -0400)]
link_path_walk: handle get_link() returning ERR_PTR() immediately

If we get ERR_PTR() from get_link(), we are guaranteed to get err != 0
when we break out of do-while, so we are going to hit if (err) return err;
shortly after it.  Pull that into the if (IS_ERR(s)) body.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agonamei: rename follow_link to trailing_symlink, move it down
Al Viro [Wed, 22 Apr 2015 17:46:57 +0000 (13:46 -0400)]
namei: rename follow_link to trailing_symlink, move it down

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agonamei: move the calls of may_follow_link() into follow_link()
Al Viro [Sun, 19 Apr 2015 04:16:37 +0000 (00:16 -0400)]
namei: move the calls of may_follow_link() into follow_link()

All remaining callers of the former are preceded by the latter

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agonamei: expand the call of follow_link() in link_path_walk()
Al Viro [Sat, 18 Apr 2015 22:45:16 +0000 (18:45 -0400)]
namei: expand the call of follow_link() in link_path_walk()

... and strip __always_inline from follow_link() - remaining callers
don't need that.

Now link_path_walk() recursion is a direct one.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agonamei: expand nested_symlink() in its only caller
Al Viro [Sat, 18 Apr 2015 03:44:45 +0000 (23:44 -0400)]
namei: expand nested_symlink() in its only caller

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agodo_last: move path there from caller's stack frame
Al Viro [Wed, 22 Apr 2015 22:02:17 +0000 (18:02 -0400)]
do_last: move path there from caller's stack frame

We used to need it to feed to follow_link().  No more...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agonamei: introduce nameidata->link
Al Viro [Wed, 22 Apr 2015 21:52:47 +0000 (17:52 -0400)]
namei: introduce nameidata->link

shares space with nameidata->next, walk_component() et.al. store
the struct path of symlink instead of returning it into a variable
passed by caller.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agonamei: don't bother with ->follow_link() if ->i_link is set
Al Viro [Fri, 1 May 2015 00:08:02 +0000 (20:08 -0400)]
namei: don't bother with ->follow_link() if ->i_link is set

with new calling conventions it's trivial

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Conflicts:
fs/namei.c

9 years agonamei.c: separate the parts of follow_link() that find the link body
Al Viro [Sat, 18 Apr 2015 22:23:41 +0000 (18:23 -0400)]
namei.c: separate the parts of follow_link() that find the link body

Split a piece of fs/namei.c:follow_link() that does obtaining the link
body into a separate function.  follow_link() itself is converted to
calling get_link() and then doing the body traversal (if any).

The next step will expand follow_link() call in link_path_walk()
and this helps to keep the size down...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agonew ->follow_link() and ->put_link() calling conventions
Al Viro [Sat, 2 May 2015 17:32:22 +0000 (13:32 -0400)]
new ->follow_link() and ->put_link() calling conventions

a) instead of storing the symlink body (via nd_set_link()) and returning
an opaque pointer later passed to ->put_link(), ->follow_link() _stores_
that opaque pointer (into void * passed by address by caller) and returns
the symlink body.  Returning ERR_PTR() on error, NULL on jump (procfs magic
symlinks) and pointer to symlink body for normal symlinks.  Stored pointer
is ignored in all cases except the last one.

Storing NULL for opaque pointer (or not storing it at all) means no call
of ->put_link().

b) the body used to be passed to ->put_link() implicitly (via nameidata).
Now only the opaque pointer is.  In the cases when we used the symlink body
to free stuff, ->follow_link() now should store it as opaque pointer in addition
to returning it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agonamei: lift nameidata into filename_mountpoint()
Al Viro [Sat, 2 May 2015 02:08:30 +0000 (22:08 -0400)]
namei: lift nameidata into filename_mountpoint()

when we go for on-demand allocation of saved state in
link_path_walk(), we'll want nameidata to stay around
for all 3 calls of path_mountpoint().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agoname: shift nameidata down into user_path_walk()
Al Viro [Thu, 30 Apr 2015 20:09:11 +0000 (16:09 -0400)]
name: shift nameidata down into user_path_walk()

that avoids having nameidata on stack during the calls of
->rmdir()/->unlink() and *two* of those during the calls
of ->rename().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agonamei: get rid of lookup_hash()
Al Viro [Thu, 30 Apr 2015 16:25:18 +0000 (12:25 -0400)]
namei: get rid of lookup_hash()

it's a convenient helper, but we'll want to shift nameidata
down the call chain, so it won't be available there...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agodo_last: regularize the logics around following symlinks
Al Viro [Wed, 22 Apr 2015 16:10:45 +0000 (12:10 -0400)]
do_last: regularize the logics around following symlinks

With LOOKUP_FOLLOW we unlazy and return 1; without it we either
fail with ELOOP or, for O_PATH opens, succeed.  No need to mix
those cases...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agodo_last: kill symlink_ok
Al Viro [Wed, 22 Apr 2015 16:02:25 +0000 (12:02 -0400)]
do_last: kill symlink_ok

When O_PATH is present, O_CREAT isn't, so symlink_ok is always equal to
(open_flags & O_PATH) && !(nd->flags & LOOKUP_FOLLOW).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agonamei: take O_NOFOLLOW treatment into do_last()
Al Viro [Wed, 22 Apr 2015 15:27:43 +0000 (11:27 -0400)]
namei: take O_NOFOLLOW treatment into do_last()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agouninline walk_component()
Al Viro [Sun, 19 Apr 2015 11:48:53 +0000 (07:48 -0400)]
uninline walk_component()

seriously improves the stack *and* I-cache footprint...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agoSECURITY: remove nameidata arg from inode_follow_link.
NeilBrown [Mon, 23 Mar 2015 02:37:39 +0000 (13:37 +1100)]
SECURITY: remove nameidata arg from inode_follow_link.

No ->inode_follow_link() methods use the nameidata arg, and
it is about to become private to namei.c.
So remove from all inode_follow_link() functions.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agologfs: fix a pagecache leak for symlinks
Al Viro [Tue, 21 Apr 2015 14:48:50 +0000 (10:48 -0400)]
logfs: fix a pagecache leak for symlinks

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agoceph: switch to simple_follow_link()
Al Viro [Sat, 2 May 2015 14:50:05 +0000 (10:50 -0400)]
ceph: switch to simple_follow_link()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agoexofs: switch to {simple,page}_symlink_inode_operations
Al Viro [Sat, 2 May 2015 14:46:42 +0000 (10:46 -0400)]
exofs: switch to {simple,page}_symlink_inode_operations

ACK-by: Boaz Harrosh <ooo@electrozaur.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agofreevxfs: switch to simple_follow_link()
Al Viro [Sat, 2 May 2015 14:43:25 +0000 (10:43 -0400)]
freevxfs: switch to simple_follow_link()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agojfs: switch to simple_follow_link()
Al Viro [Sat, 2 May 2015 14:41:20 +0000 (10:41 -0400)]
jfs: switch to simple_follow_link()

Reviewed-by: Jan Kara <jack@suse.cz>
Acked-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agosysv: switch to simple_follow_link()
Al Viro [Sat, 2 May 2015 14:37:09 +0000 (10:37 -0400)]
sysv: switch to simple_follow_link()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agoubifs: switch to simple_follow_link()
Al Viro [Sat, 2 May 2015 14:35:42 +0000 (10:35 -0400)]
ubifs: switch to simple_follow_link()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agoufs: switch to simple_follow_link()
Al Viro [Sat, 2 May 2015 14:28:56 +0000 (10:28 -0400)]
ufs: switch to simple_follow_link()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agodebugfs: switch to simple_follow_link()
Al Viro [Sat, 2 May 2015 14:27:18 +0000 (10:27 -0400)]
debugfs: switch to simple_follow_link()

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agoshmem: switch to simple_follow_link()
Al Viro [Sat, 2 May 2015 14:24:43 +0000 (10:24 -0400)]
shmem: switch to simple_follow_link()

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agojffs2: switch to simple_follow_link()
Al Viro [Sat, 2 May 2015 14:21:20 +0000 (10:21 -0400)]
jffs2: switch to simple_follow_link()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agoext4: switch to simple_follow_link()
Al Viro [Sat, 2 May 2015 14:13:58 +0000 (10:13 -0400)]
ext4: switch to simple_follow_link()

for fast symlinks only, of course...

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agoext3: switch to simple_follow_link()
Al Viro [Sat, 2 May 2015 14:10:02 +0000 (10:10 -0400)]
ext3: switch to simple_follow_link()

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agobefs: switch to simple_follow_link()
Al Viro [Sat, 2 May 2015 14:06:54 +0000 (10:06 -0400)]
befs: switch to simple_follow_link()

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agoext2: use simple_follow_link()
Al Viro [Sat, 2 May 2015 14:02:46 +0000 (10:02 -0400)]
ext2: use simple_follow_link()

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agolibfs: simple_follow_link()
Al Viro [Sat, 2 May 2015 13:54:06 +0000 (09:54 -0400)]
libfs: simple_follow_link()

let "fast" symlinks store the pointer to the body into ->i_link and
use simple_follow_link for ->follow_link()

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agoext4: split inode_operations for encrypted symlinks off the rest
Al Viro [Mon, 27 Apr 2015 21:51:30 +0000 (17:51 -0400)]
ext4: split inode_operations for encrypted symlinks off the rest

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agoovl: rearrange ovl_follow_link to it doesn't need to call ->put_link
NeilBrown [Mon, 23 Mar 2015 02:37:39 +0000 (13:37 +1100)]
ovl: rearrange ovl_follow_link to it doesn't need to call ->put_link

ovl_follow_link current calls ->put_link on an error path.
However ->put_link is about to change in a way that it will be
impossible to call it from ovl_follow_link.

So rearrange the code to avoid the need for that error path.
Specifically: move the kmalloc() call before the ->follow_link()
call to the subordinate filesystem.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years ago9p: don't bother with __getname() in ->follow_link()
Al Viro [Tue, 14 Apr 2015 21:42:49 +0000 (17:42 -0400)]
9p: don't bother with __getname() in ->follow_link()

We copy there a kmalloc'ed string and proceed to kfree that string immediately
after that.  Easier to just feed that string to nd_set_link() and _not_
kfree it until ->put_link() (which becomes kfree_put_link() in that case).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years ago9p: don't bother with 4K allocation for 24-byte local array...
Al Viro [Tue, 14 Apr 2015 16:10:34 +0000 (12:10 -0400)]
9p: don't bother with 4K allocation for 24-byte local array...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agoLinux 4.1-rc3
Linus Torvalds [Sun, 10 May 2015 22:12:29 +0000 (15:12 -0700)]
Linux 4.1-rc3

9 years agoMerge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Sun, 10 May 2015 21:58:53 +0000 (14:58 -0700)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "I really need to get back to sending these on my Friday, instead of my
  Monday morning, but nothing too amazing in here: a few amdkfd fixes, a
  few radeon fixes, i915 fixes, one tegra fix and one core fix"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm: Zero out invalid vblank timestamp in drm_update_vblank_count.
  drm/tegra: Don't use vblank_disable_immediate on incapable driver.
  drm/radeon: stop trying to suspend UVD sessions
  drm/radeon: more strictly validate the UVD codec
  drm/radeon: make UVD handle checking more strict
  drm/radeon: make VCE handle check more strict
  drm/radeon: fix userptr lockup
  drm/radeon: fix userptr BO unpin bug v3
  drm/amdkfd: Initialize sdma vm when creating sdma queue
  drm/amdkfd: Don't report local memory size
  drm/amdkfd: allow unregister process with queues
  drm/i915: Drop PIPE-A quirk for 945GSE HP Mini
  drm/i915: Sink rate read should be saved in deca-kHz
  drm/i915/dp: there is no audio on port A
  drm/i915: Add missing MacBook Pro models with dual channel LVDS
  drm/i915: Assume dual channel LVDS if pixel clock necessitates it
  drm/radeon: don't setup audio on asics that don't support it
  drm/radeon: disable semaphores for UVD V1 (v2)

9 years agoMerge tag 'drm-intel-fixes-2015-05-08' of git://anongit.freedesktop.org/drm-intel...
Dave Airlie [Sun, 10 May 2015 20:06:22 +0000 (06:06 +1000)]
Merge tag 'drm-intel-fixes-2015-05-08' of git://anongit.freedesktop.org/drm-intel into drm-fixes

misc i915 fixes.

* tag 'drm-intel-fixes-2015-05-08' of git://anongit.freedesktop.org/drm-intel:
  drm/i915: Drop PIPE-A quirk for 945GSE HP Mini
  drm/i915: Sink rate read should be saved in deca-kHz
  drm/i915/dp: there is no audio on port A
  drm/i915: Add missing MacBook Pro models with dual channel LVDS
  drm/i915: Assume dual channel LVDS if pixel clock necessitates it

9 years agodrm: Zero out invalid vblank timestamp in drm_update_vblank_count.
Mario Kleiner [Tue, 7 Apr 2015 04:31:09 +0000 (06:31 +0200)]
drm: Zero out invalid vblank timestamp in drm_update_vblank_count.

Since commit 844b03f27739135fe1fed2fef06da0ffc4c7a081 we make
sure that after vblank irq off, we return the last valid
(vblank count, vblank timestamp) pair to clients, e.g., during
modesets, which is good.

An overlooked side effect of that commit for kms drivers without
support for precise vblank timestamping is that at vblank irq
enable, when we update the vblank counter from the hw counter, we
can't update the corresponding vblank timestamp, so now we have a
totally mismatched timestamp for the new count to confuse clients.

Restore old client visible behaviour from before Linux 3.17, but
zero out the timestamp at vblank counter update (instead of disable
as in original implementation) if we can't generate a meaningful
timestamp immediately for the new vblank counter. This will fix
this regression, so callers know they need to retry again later
if they need a valid timestamp, but at the same time preserves
the improvements made in the commit mentioned above.

Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Cc: <stable@vger.kernel.org> #v3.17+
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
9 years agoMerge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
Linus Torvalds [Sun, 10 May 2015 18:16:48 +0000 (11:16 -0700)]
Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm

Pull ARM fixes from Russell King:
 "A set of ARM fixes:

   - fix an off-by-one error in the iommu DMA ops, which caused errors
     with a 4GiB size.

   - remove comments mentioning the non-existent CONFIG_CPU_ARM1020_CPU_IDLE
     macro.

   - remove useless CONFIG_CPU_ICACHE_STREAMING_DISABLE blocks, where
     this symbol never appeared in any Kconfig.

   - fix Feroceon code to cope with a previous change correctly (it
     incorrectly left an additional word in an assembly structure
     definition)

   - avoid a misleading IRQ affinity warning in the ARM PMU code for
     IRQs which are already affine to their CPUs.

   - fix the node name printed in the IRQ affinity warning"

* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
  ARM: 8352/1: perf: Fix the pmu node name in warning message
  ARM: 8351/1: perf: don't warn about missing interrupt-affinity property for PPIs
  ARM: 8350/1: proc-feroceon: Fix feroceon_proc_info macro
  ARM: 8349/1: arch/arm/mm/proc-arm925.S: remove dead #ifdef block
  ARM: 8348/1: remove comments on CPU_ARM1020_CPU_IDLE
  ARM: 8347/1: dma-mapping: fix off-by-one check in arm_setup_iommu_dma_ops

9 years agoMerge tag 'samsung-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene...
Linus Torvalds [Sun, 10 May 2015 18:13:19 +0000 (11:13 -0700)]
Merge tag 'samsung-fixes-1' of git://git./linux/kernel/git/kgene/linux-samsung

Pull samsung fixes from Kukjin Kim:
 "Here is Samsung fixes for v4.1.  Since I've missed to send this via
  arm-soc tree before v4.1-rc3, so I'm sending this to you directly

   - fix commit ea08de16eb1b ("ARM: dts: Add DISP1 power domain for
     exynos5420") which causes 'unhandled fault: imprecise external
     abort' error when PD turned off.  ("make DP a consumer of DISP1
     power domain")

   - fix 's3c-rtc' probe failure on Odriod-X2/U2/U3 boards ("add
     'rtc_src' clock to rtc node for source clock of rtc")

   - fix typo for 'cpu-crit-0' trip point on exynos5420/5440

   - fix S2R failure on exynos5250-snow due to card power of Marvell
     WiFi driver (suspend/resume) ("add keep-power-in-susped to WiFi
     SDIO node")"

* tag 'samsung-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
  ARM: dts: Add keep-power-in-suspend to WiFi SDIO node for exynos5250-snow
  ARM: dts: Fix typo in trip point temperature for exynos5420/5440
  ARM: dts: add 'rtc_src' clock to rtc node for exynos4412-odroid boards
  ARM: dts: Make DP a consumer of DISP1 power domain on Exynos5420

9 years agoMerge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm...
Linus Torvalds [Sat, 9 May 2015 23:13:38 +0000 (16:13 -0700)]
Merge tag 'fixes-for-linus' of git://git./linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Arnd Bergmann:
 "A few patches have come up since the merge window.  The largest one is
  a rewrite of the PXA lubbock/mainstone IRQ handling.  This was already
  broken in 2011 by a change to the GPIO code and only noticed now.

  The other changes contained here are:

  MAINTAINERS file updates:

   - Ray Jui and Scott Branden are now co-maintainers for some of the
     mach-bcm chips, while Christian Daudt and Marc Carino have stepped
     down.

   - Andrew Victor is no longer maintaining at91.  Instead, Alexandre
     Belloni now becomes an official maintainer, after having done a
     bulk of the work for a while.

   - Baruch Siach, who added the mach-digicolor platform in 4.1 is now
     listed as maintainer

   - The git URL for mach-socfpga has changed

  Bug fixes:

   - Three bug fixes for new rockchip rk3288 code

   - A regression fix to make SD card support work on certain ux500
     boards

   - multiple smaller dts fixes for imx, omap, mvebu, and shmobile

   - a regression fiix for omap3 power consumption

   - a fix for regression in the ARM CCI bus driver

  Configuration changes:

   - more imx platforms are now enabled in multi_v7_defconfig"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (39 commits)
  MAINTAINERS: add Conexant Digicolor machines entry
  MAINTAINERS: socfpga: update the git repo for SoCFPGA
  ARM: multi_v7_defconfig: Select more FSL SoCs
  MAINTAINERS: replace an AT91 maintainer
  drivers: CCI: fix used_mask init in validate_group()
  bus: omap_l3_noc: Fix master id address decoding for OMAP5
  bus: omap_l3_noc: Fix offset for DRA7 CLK1_HOST_CLK1_2 instance
  ARM: dts: dra7: Fix efuse register size for ABB
  ARM: dts: am57xx-beagle-x15: Switch GPIO fan number
  ARM: dts: am57xx-beagle-x15: Switch UART mux pins
  ARM: dts: am437x-sk: reduce col-scan-delay-us
  ARM: dts: am437x-sk: fix for new newhaven display module revision
  ARM: dts: am57xx-beagle-x15: Fix RTC aliases
  ARM: dts: am57xx-beagle-x15: Fix IRQ type for mcp7941x
  ARM: dts: omap3: Add #iommu-cells to isp and iva iommu
  ARM: omap2plus_defconfig: Enable EXTCON_USB_GPIO
  ARM: dts: OMAP3-N900: Add microphone bias voltages
  ARM: OMAP2+: Fix omap off idle power consumption creeping up
  MAINTAINERS: Update brcmstb entry
  MAINTAINERS: Remove Christian Daudt for mach-bcm
  ...

9 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm...
Linus Torvalds [Sat, 9 May 2015 23:07:14 +0000 (16:07 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/ebiederm/user-namespace

Pull user-namespace fix from Eric Biederman:
 "Eric Windish recently reported a really bug that allows mounting fresh
  copies of proc and sysfs when it really should not be allowed.  The
  code attempted to verify that proc and sysfs were fully visible but
  there is a test missing to ensure that the root of the filesystem is
  visible.  Doh!

  The following patch fixes that.

  This fixes a containment issue that the docker folks are seeing"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
  mnt: Fix fs_fully_visible to verify the root directory is visible

9 years agoMerge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 9 May 2015 21:59:05 +0000 (14:59 -0700)]
Merge branch 'irq-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull irq updates from Thomas Gleixner:
 "Two patches from the irq departement:

   - a simple fix to make dummy_irq_chip usable for wakeup scenarios

   - removal of the gic arch_extn hackery.  Now that all users are
     converted we really want to get rid of the interface so people wont
     come up with new use cases"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip: gic: Drop support for gic_arch_extn
  genirq: Set IRQCHIP_SKIP_SET_WAKE flag for dummy_irq_chip

9 years agoMerge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 9 May 2015 21:57:49 +0000 (14:57 -0700)]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull timer fix from Thomas Gleixner:
 "A simple fix to actually shut down a detached device instead of
  keeping it active"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  clockevents: Shutdown detached clockevent device

9 years agom32r: make flush_cpumask non-volatile.
Rusty Russell [Fri, 8 May 2015 18:09:52 +0000 (03:39 +0930)]
m32r: make flush_cpumask non-volatile.

We cast away the volatile, but really, why make it volatile at all?
We already do a mb() inside the cpumask_empty() loop.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agomnt: Fix fs_fully_visible to verify the root directory is visible
Eric W. Biederman [Fri, 8 May 2015 21:36:50 +0000 (16:36 -0500)]
mnt: Fix fs_fully_visible to verify the root directory is visible

This fixes a dumb bug in fs_fully_visible that allows proc or sys to
be mounted if there is a bind mount of part of /proc/ or /sys/ visible.

Cc: stable@vger.kernel.org
Reported-by: Eric Windisch <ewindisch@docker.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
9 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Linus Torvalds [Sat, 9 May 2015 04:39:12 +0000 (21:39 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs

Pull vfs fixes from Al Viro:
 "A couple of fixes for bugs caught while digging in fs/namei.c.  The
  first one is this cycle regression, the second is 3.11 and later"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  path_openat(): fix double fput()
  namei: d_is_negative() should be checked before ->d_seq validation

9 years agopath_openat(): fix double fput()
Al Viro [Sat, 9 May 2015 02:53:15 +0000 (22:53 -0400)]
path_openat(): fix double fput()

path_openat() jumps to the wrong place after do_tmpfile() - it has
already done path_cleanup() (as part of path_lookupat() called by
do_tmpfile()), so doing that again can lead to double fput().

Cc: stable@vger.kernel.org # v3.11+
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agonamei: d_is_negative() should be checked before ->d_seq validation
Al Viro [Thu, 7 May 2015 23:24:57 +0000 (19:24 -0400)]
namei: d_is_negative() should be checked before ->d_seq validation

Fetching ->d_inode, verifying ->d_seq and finding d_is_negative() to
be true does *not* mean that inode we'd fetched had been NULL - that
holds only while ->d_seq is still unchanged.

Shift d_is_negative() checks into lookup_fast() prior to ->d_seq
verification.

Reported-by: Steven Rostedt <rostedt@goodmis.org>
Tested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agoMerge branch 'for-linus-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/mason...
Linus Torvalds [Sat, 9 May 2015 03:59:02 +0000 (20:59 -0700)]
Merge branch 'for-linus-4.1' of git://git./linux/kernel/git/mason/linux-btrfs

Pull btrfs fix from Chris Mason:
 "When an arm user reported crashes near page_address(page) in my new
  code, it became clear that I can't be trusted with GFP masks.  Filipe
  beat me to the patch, and I'll just be in the corner with my dunce cap
  on"

* 'for-linus-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  Btrfs: fix wrong mapping flags for free space inode

9 years agoMerge tag 'dm-4.1-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device...
Linus Torvalds [Sat, 9 May 2015 03:38:21 +0000 (20:38 -0700)]
Merge tag 'dm-4.1-fixes-2' of git://git./linux/kernel/git/device-mapper/linux-dm

Pull device mapper fixes from Mike Snitzer:
 "Two additional fixes for changes introduced via DM during the 4.1
  merge window.

  The first reverts a dm-crypt change that wasn't correct.  The second
  fixes a device format regression that impacted userspace"

* tag 'dm-4.1-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  init: fix regression by supporting devices with major:minor:offset format
  Revert "dm crypt: fix deadlock when async crypto algorithm returns -EBUSY"

9 years agoMerge branch 'for-linus' of git://git.kernel.dk/linux-block
Linus Torvalds [Sat, 9 May 2015 02:49:35 +0000 (19:49 -0700)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
 "A collection of fixes since the merge window;

   - fix for a double elevator module release, from Chao Yu.  Ancient bug.

   - the splice() MORE flag fix from Christophe Leroy.

   - a fix for NVMe, fixing a patch that went in in the merge window.
     From Keith.

   - two fixes for blk-mq CPU hotplug handling, from Ming Lei.

   - bdi vs blockdev lifetime fix from Neil Brown, fixing and oops in md.

   - two blk-mq fixes from Shaohua, fixing a race on queue stop and a
     bad merge issue with FUA writes.

   - division-by-zero fix for writeback from Tejun.

   - a block bounce page accounting fix, making sure we inc/dec after
     bouncing so that pre/post IO pages match up.  From Wang YanQing"

* 'for-linus' of git://git.kernel.dk/linux-block:
  splice: sendfile() at once fails for big files
  blk-mq: don't lose requests if a stopped queue restarts
  blk-mq: fix FUA request hang
  block: destroy bdi before blockdev is unregistered.
  block:bounce: fix call inc_|dec_zone_page_state on different pages confuse value of NR_BOUNCE
  elevator: fix double release of elevator module
  writeback: use |1 instead of +1 to protect against div by zero
  blk-mq: fix CPU hotplug handling
  blk-mq: fix race between timeout and CPU hotplug
  NVMe: Fix VPD B0 max sectors translation

9 years agoMerge tag 'gpio-v4.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux...
Linus Torvalds [Sat, 9 May 2015 02:42:59 +0000 (19:42 -0700)]
Merge tag 'gpio-v4.1-2' of git://git./linux/kernel/git/linusw/linux-gpio

Pull GPIO fixes from Linus Walleij:
 "Here is a bunch of GPIO fixes that I collected since -rc1, nothing
  controversial, nothing special:

   - fix a memory leak for GPIO hotplug.

   - fix a signedness bug in the ACPI GPIO pin validation.

   - driver fixes: Qualcomm SPMI and OMAP MPUIO IRQ issues"

* tag 'gpio-v4.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio: omap: Fix regression for MPUIO interrupts
  gpio: sysfs: fix memory leaks and device hotplug
  pinctrl: qcom-spmi-gpio: Fix input value report
  pinctrl: qcom-spmi-gpio: Fix output type configuration
  gpiolib: change gpio pin from unsigned to signed in acpi callback

9 years agoMerge tag 'mmc-4.1-rc2' of git://git.linaro.org/people/ulf.hansson/mmc
Linus Torvalds [Sat, 9 May 2015 02:34:35 +0000 (19:34 -0700)]
Merge tag 'mmc-4.1-rc2' of git://git.linaro.org/people/ulf.hansson/mmc

Pull MMC fixes from Ulf Hansson:
 "MMC core:
   - Don't access RPMB partitions for normal read/write
   - Fix hibernation restore sequence

  MMC host:
   - dw_mmc: Fix card detection for non removable cards
   - dw_mmc: Fix sglist issue in 32-bit mode
   - sh_mmcif: Fix timeout value for command request"

* tag 'mmc-4.1-rc2' of git://git.linaro.org/people/ulf.hansson/mmc:
  mmc: dw_mmc: dw_mci_get_cd check MMC_CAP_NONREMOVABLE
  mmc: dw_mmc: init desc in dw_mci_idmac_init
  mmc: card: Don't access RPMB partitions for normal read/write
  mmc: sh_mmcif: Fix timeout value for command request
  mmc: core: add missing pm event in mmc_pm_notify to fix hib restore

9 years agoMerge tag 'trace-fixes-v4.1-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 9 May 2015 01:22:05 +0000 (18:22 -0700)]
Merge tag 'trace-fixes-v4.1-rc2' of git://git./linux/kernel/git/rostedt/linux-trace

Pull tracing fix from Steven Rostedt:
 "The newly added ftrace_print_array_seq() function had a bug in it.
  Luckily, the only user of it didn't make the 4.1 merge window.

  But the helper function should be fixed before 4.2 when the users
  start coming in"

* tag 'trace-fixes-v4.1-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Make ftrace_print_array_seq compute buf_len

9 years agoARM: dts: Add keep-power-in-suspend to WiFi SDIO node for exynos5250-snow
Javier Martinez Canillas [Fri, 8 May 2015 18:15:16 +0000 (03:15 +0900)]
ARM: dts: Add keep-power-in-suspend to WiFi SDIO node for exynos5250-snow

The Marvell mwifiex driver prevents the system to enter into a suspend
state if the card power is not preserved during a suspend/resume cycle.

So Suspend-to-RAM and Suspend-to-idle are failing on Exynos5250 Snow.

Add the keep-power-in-suspend Power Management property to the SDIO/MMC
node so the mwifiex suspend handler doesn't fail and the system is able
to enter into a suspend state.

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
9 years agoARM: dts: Fix typo in trip point temperature for exynos5420/5440
Abhilash Kesavan [Fri, 8 May 2015 18:11:21 +0000 (03:11 +0900)]
ARM: dts: Fix typo in trip point temperature for exynos5420/5440

Remove the extra zero in the "cpu-crit-0" trip point for exynos5420
and exynos5440.

Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
9 years agoARM: dts: add 'rtc_src' clock to rtc node for exynos4412-odroid boards
Markus Reichl [Fri, 8 May 2015 18:05:51 +0000 (03:05 +0900)]
ARM: dts: add 'rtc_src' clock to rtc node for exynos4412-odroid boards

The Exynos4412 SoC has a s3c6410 RTC where the source clock
is now a mandatory property.
This patch fixes probe failure of s3c-rtc on Odroid-X2/U2/U3 boards.

Signed-off-by: Markus Reichl <m.reichl@fivetechno.de>
Tested-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Tested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
9 years agoARM: dts: Make DP a consumer of DISP1 power domain on Exynos5420
Javier Martinez Canillas [Fri, 8 May 2015 17:33:42 +0000 (02:33 +0900)]
ARM: dts: Make DP a consumer of DISP1 power domain on Exynos5420

Commit ea08de16eb1b ("ARM: dts: Add DISP1 power domain for exynos5420")
added a device node for the Exynos5420 DISP1 power domain but dit not
make the DP controller a consumer of that power domain.

This causes an "Unhandled fault: imprecise external abort" error if the
exynos-dp driver tries to access the DP controller registers and the PD
was turned off. This lead to a kernel panic and a complete system hang.

Make the DP controller device node a consumer of the DISP1 power domain
to ensure that the PD is turned on when the exynos-dp driver is probed.

Fixes: ea08de16eb1b ("ARM: dts: Add DISP1 power domain for exynos5420")
Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
9 years agoMAINTAINERS: add Conexant Digicolor machines entry
Baruch Siach [Tue, 28 Apr 2015 10:59:43 +0000 (13:59 +0300)]
MAINTAINERS: add Conexant Digicolor machines entry

This adds Baruch as the maintainer for the Digicolor platform.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
9 years agoMAINTAINERS: socfpga: update the git repo for SoCFPGA
Dinh Nguyen [Mon, 20 Apr 2015 19:13:12 +0000 (14:13 -0500)]
MAINTAINERS: socfpga: update the git repo for SoCFPGA

The git tree at rocketboards.org is going away. Update the entry to reflect
the address of the new location. Also add an entry for all the socfpga_*
dts files.

Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
9 years agodrm/tegra: Don't use vblank_disable_immediate on incapable driver.
Mario Kleiner [Mon, 4 May 2015 04:29:44 +0000 (06:29 +0200)]
drm/tegra: Don't use vblank_disable_immediate on incapable driver.

Tegra would not only need a hardware vblank counter that
increments at leading edge of vblank, but also support
for instantaneous high precision vblank timestamp queries, ie.
a proper implementation of dev->driver->get_vblank_timestamp().

Without these, there can be off-by-one errors during vblank
disable/enable if the scanout is inside vblank at en/disable
time, and additionally clients will never see any useable
vblank timestamps when querying via drmWaitVblank ioctl. This
would negatively affect swap scheduling under X11 and Wayland.

Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>