hugetlb: introduce generic version of huge_ptep_clear_flush

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

Link: http://lkml.kernel.org/r/20180920060358.16606-6-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 ad36e84..b897541 100644 (file)
--- a/arch/arm/include/asm/hugetlb-3level.h
+++ b/arch/arm/include/asm/hugetlb-3level.h
@@ -37,12 +37,6 @@ static inline pte_t huge_ptep_get(pte_t *ptep)
        return retval;
 }
 
-static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
-                                        unsigned long addr, pte_t *ptep)
-{
-       ptep_clear_flush(vma, addr, ptep);
-}
-
 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
                                           unsigned long addr, pte_t *ptep)
 {

diff --git a/arch/arm64/include/asm/hugetlb.h b/arch/arm64/include/asm/hugetlb.h
index 6ae0bca..4c8dd48 100644 (file)
--- a/arch/arm64/include/asm/hugetlb.h
+++ b/arch/arm64/include/asm/hugetlb.h
@@ -71,6 +71,7 @@ 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,
                                    unsigned long addr, pte_t *ptep);
+#define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
 extern void huge_ptep_clear_flush(struct vm_area_struct *vma,
                                  unsigned long addr, pte_t *ptep);
 #define __HAVE_ARCH_HUGE_PTE_CLEAR

diff --git a/arch/ia64/include/asm/hugetlb.h b/arch/ia64/include/asm/hugetlb.h
index 6719c74..41b5f6a 100644 (file)
--- a/arch/ia64/include/asm/hugetlb.h
+++ b/arch/ia64/include/asm/hugetlb.h
@@ -20,6 +20,7 @@ static inline int is_hugepage_only_range(struct mm_struct *mm,
                REGION_NUMBER((addr)+(len)-1) == RGN_HPAGE);
 }
 
+#define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
 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 0959cc5..7df1f11 100644 (file)
--- a/arch/mips/include/asm/hugetlb.h
+++ b/arch/mips/include/asm/hugetlb.h
@@ -48,6 +48,7 @@ static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
        return pte;
 }
 
+#define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
                                         unsigned long addr, pte_t *ptep)
 {

diff --git a/arch/parisc/include/asm/hugetlb.h b/arch/parisc/include/asm/hugetlb.h
index 6e281e1..9afff26 100644 (file)
--- a/arch/parisc/include/asm/hugetlb.h
+++ b/arch/parisc/include/asm/hugetlb.h
@@ -32,6 +32,7 @@ static inline int prepare_hugepage_range(struct file *file,
        return 0;
 }
 
+#define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
                                         unsigned long addr, pte_t *ptep)
 {

diff --git a/arch/powerpc/include/asm/hugetlb.h b/arch/powerpc/include/asm/hugetlb.h
index 91bdc84..1eb3e13 100644 (file)
--- a/arch/powerpc/include/asm/hugetlb.h
+++ b/arch/powerpc/include/asm/hugetlb.h
@@ -140,6 +140,7 @@ static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
 #endif
 }
 
+#define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
                                         unsigned long addr, pte_t *ptep)
 {

diff --git a/arch/sh/include/asm/hugetlb.h b/arch/sh/include/asm/hugetlb.h
index 08ee6c0..9abf9c8 100644 (file)
--- a/arch/sh/include/asm/hugetlb.h
+++ b/arch/sh/include/asm/hugetlb.h
@@ -25,6 +25,7 @@ static inline int prepare_hugepage_range(struct file *file,
        return 0;
 }
 
+#define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
 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 944e3a4..651a959 100644 (file)
--- a/arch/sparc/include/asm/hugetlb.h
+++ b/arch/sparc/include/asm/hugetlb.h
@@ -42,6 +42,7 @@ static inline int prepare_hugepage_range(struct file *file,
        return 0;
 }
 
+#define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
                                         unsigned long addr, pte_t *ptep)
 {

diff --git a/arch/x86/include/asm/hugetlb.h b/arch/x86/include/asm/hugetlb.h
index e9e7fef..fd59673 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 void huge_ptep_clear_flush(struct vm_area_struct *vma,
-                                        unsigned long addr, pte_t *ptep)
-{
-       ptep_clear_flush(vma, addr, ptep);
-}
-
 static inline int huge_pte_none(pte_t pte)
 {
        return pte_none(pte);

diff --git a/include/asm-generic/hugetlb.h b/include/asm-generic/hugetlb.h
index 0f6f151..ffa63fd 100644 (file)
--- a/include/asm-generic/hugetlb.h
+++ b/include/asm-generic/hugetlb.h
@@ -65,4 +65,12 @@ static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
 }
 #endif
 
+#ifndef __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
+static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
+               unsigned long addr, pte_t *ptep)
+{
+       ptep_clear_flush(vma, addr, ptep);
+}
+#endif
+
 #endif /* _ASM_GENERIC_HUGETLB_H */