hugetlb: introduce generic version of huge_ptep_get_and_clear()

arm, ia64, sh, x86 architectures use the same version of
huge_ptep_get_and_clear, so move this generic implementation into
asm-generic/hugetlb.h.

Link: http://lkml.kernel.org/r/20180920060358.16606-5-alex@ghiti.fr
Signed-off-by: Alexandre Ghiti <alex@ghiti.fr>
Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Tested-by: Helge Deller <deller@gmx.de>			[parisc]
Acked-by: Catalin Marinas <catalin.marinas@arm.com>	[arm64]
Acked-by: Paul Burton <paul.burton@mips.com>		[MIPS]
Acked-by: Ingo Molnar <mingo@kernel.org>		[x86]
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James E.J. Bottomley <jejb@parisc-linux.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/arm/include/asm/hugetlb-3level.h b/arch/arm/include/asm/hugetlb-3level.h
index 398fb06e82077f52673c381d5e56c7fc7340f8ce..ad36e84b819a9f92ba2e06ba8e0582a1e4d3dd42 100644 (file)
--- a/arch/arm/include/asm/hugetlb-3level.h
+++ b/arch/arm/include/asm/hugetlb-3level.h
@@ -49,12 +49,6 @@ static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
        ptep_set_wrprotect(mm, addr, ptep);
 }
 
-static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
-                                           unsigned long addr, pte_t *ptep)
-{
-       return ptep_get_and_clear(mm, addr, ptep);
-}
-
 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
                                             unsigned long addr, pte_t *ptep,
                                             pte_t pte, int dirty)

diff --git a/arch/arm64/include/asm/hugetlb.h b/arch/arm64/include/asm/hugetlb.h
index 874661a1dff153b2d7453075bee4e052b5cc3312..6ae0bcafe162073f6563b9315a9831a5f51c7669 100644 (file)
--- a/arch/arm64/include/asm/hugetlb.h
+++ b/arch/arm64/include/asm/hugetlb.h
@@ -66,6 +66,7 @@ extern void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
 extern int huge_ptep_set_access_flags(struct vm_area_struct *vma,
                                      unsigned long addr, pte_t *ptep,
                                      pte_t pte, int dirty);
+#define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
 extern pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
                                     unsigned long addr, pte_t *ptep);
 extern void huge_ptep_set_wrprotect(struct mm_struct *mm,

diff --git a/arch/ia64/include/asm/hugetlb.h b/arch/ia64/include/asm/hugetlb.h
index a235d6f60fb326ec5b488a8600993a1752906a29..6719c74da0de6c04727d1cdc36d3deb440b33a04 100644 (file)
--- a/arch/ia64/include/asm/hugetlb.h
+++ b/arch/ia64/include/asm/hugetlb.h
@@ -20,12 +20,6 @@ static inline int is_hugepage_only_range(struct mm_struct *mm,
                REGION_NUMBER((addr)+(len)-1) == RGN_HPAGE);
 }
 
-static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
-                                           unsigned long addr, pte_t *ptep)
-{
-       return ptep_get_and_clear(mm, addr, ptep);
-}
-
 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
                                         unsigned long addr, pte_t *ptep)
 {

diff --git a/arch/mips/include/asm/hugetlb.h b/arch/mips/include/asm/hugetlb.h
index 8ea439041d5d36c3eadfd21831e0272d66dd203d..0959cc5a41fa876c191dd1815853ab3cc3df4672 100644 (file)
--- a/arch/mips/include/asm/hugetlb.h
+++ b/arch/mips/include/asm/hugetlb.h
@@ -36,6 +36,7 @@ static inline int prepare_hugepage_range(struct file *file,
        return 0;
 }
 
+#define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
                                            unsigned long addr, pte_t *ptep)
 {

diff --git a/arch/parisc/include/asm/hugetlb.h b/arch/parisc/include/asm/hugetlb.h
index 77c8adbac7c3c5fe435b587d76213bbb683a8d34..6e281e1bb3365acbdaf49e9327b597d84df3f4df 100644 (file)
--- a/arch/parisc/include/asm/hugetlb.h
+++ b/arch/parisc/include/asm/hugetlb.h
@@ -8,6 +8,7 @@
 void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
                     pte_t *ptep, pte_t pte);
 
+#define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
 pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
                              pte_t *ptep);
 

diff --git a/arch/powerpc/include/asm/hugetlb.h b/arch/powerpc/include/asm/hugetlb.h
index 33b899624922095890b19b95b6304582d37090f3..91bdc84b76ced1f12457a1a86563fed708fee3a9 100644 (file)
--- a/arch/powerpc/include/asm/hugetlb.h
+++ b/arch/powerpc/include/asm/hugetlb.h
@@ -129,6 +129,7 @@ static inline int prepare_hugepage_range(struct file *file,
        return 0;
 }
 
+#define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
                                            unsigned long addr, pte_t *ptep)
 {

diff --git a/arch/sh/include/asm/hugetlb.h b/arch/sh/include/asm/hugetlb.h
index bc552e37c1c972aa11c9b4ca828658330ce3b3cb..08ee6c00b5e9ae9a1c9db5048537151197e2262c 100644 (file)
--- a/arch/sh/include/asm/hugetlb.h
+++ b/arch/sh/include/asm/hugetlb.h
@@ -25,12 +25,6 @@ static inline int prepare_hugepage_range(struct file *file,
        return 0;
 }
 
-static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
-                                           unsigned long addr, pte_t *ptep)
-{
-       return ptep_get_and_clear(mm, addr, ptep);
-}
-
 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
                                         unsigned long addr, pte_t *ptep)
 {

diff --git a/arch/sparc/include/asm/hugetlb.h b/arch/sparc/include/asm/hugetlb.h
index 16b0c53ea6c958d3ab6afbee813f96040a72299f..944e3a4bfaffa751ddc4f6c86a12b81b5b175cf8 100644 (file)
--- a/arch/sparc/include/asm/hugetlb.h
+++ b/arch/sparc/include/asm/hugetlb.h
@@ -16,6 +16,7 @@ extern struct pud_huge_patch_entry __pud_huge_patch, __pud_huge_patch_end;
 void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
                     pte_t *ptep, pte_t pte);
 
+#define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
 pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
                              pte_t *ptep);
 

diff --git a/arch/x86/include/asm/hugetlb.h b/arch/x86/include/asm/hugetlb.h
index 8db9a761964dc6bb593369f4062b8bdfbf33cec0..e9e7fef867add4dfaaf221cea9435bd01cef4a03 100644 (file)
--- a/arch/x86/include/asm/hugetlb.h
+++ b/arch/x86/include/asm/hugetlb.h
@@ -28,12 +28,6 @@ static inline int prepare_hugepage_range(struct file *file,
        return 0;
 }
 
-static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
-                                           unsigned long addr, pte_t *ptep)
-{
-       return ptep_get_and_clear(mm, addr, ptep);
-}
-
 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
                                         unsigned long addr, pte_t *ptep)
 {

diff --git a/include/asm-generic/hugetlb.h b/include/asm-generic/hugetlb.h
index ee010b756246008ec578b132d33467940c8c0cda..0f6f151780dd67ad1ab6fbfee11fcc000edd58f2 100644 (file)
--- a/include/asm-generic/hugetlb.h
+++ b/include/asm-generic/hugetlb.h
@@ -57,4 +57,12 @@ static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
 }
 #endif
 
+#ifndef __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
+static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
+               unsigned long addr, pte_t *ptep)
+{
+       return ptep_get_and_clear(mm, addr, ptep);
+}
+#endif
+
 #endif /* _ASM_GENERIC_HUGETLB_H */