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| author | Vineet Gupta <vgupta@synopsys.com> | 2015-02-16 14:31:29 +0100 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2015-10-09 13:34:23 +0200 |
| commit | 24830fc782a3a740209d39cb27abbf5a9763f61f (patch) | |
| tree | 76478dc1c698fd8103c183219af9ba7728051e4d /arch/arc | |
| parent | ARC: mm: pte flags comsetic cleanups, comments (diff) | |
| download | linux-24830fc782a3a740209d39cb27abbf5a9763f61f.tar.xz linux-24830fc782a3a740209d39cb27abbf5a9763f61f.zip | |
ARC: mm: Introduce PTE_SPECIAL
Needed for THP, but will also come in handy for fast GUP later
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/include/asm/pgtable.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/arc/include/asm/pgtable.h b/arch/arc/include/asm/pgtable.h index 481359fe56ae..431a83329324 100644 --- a/arch/arc/include/asm/pgtable.h +++ b/arch/arc/include/asm/pgtable.h @@ -61,6 +61,7 @@ #define _PAGE_WRITE (1<<4) /* Page has user write perm (H) */ #define _PAGE_READ (1<<5) /* Page has user read perm (H) */ #define _PAGE_DIRTY (1<<6) /* Page modified (dirty) (S) */ +#define _PAGE_SPECIAL (1<<7) #define _PAGE_GLOBAL (1<<8) /* Page is global (H) */ #define _PAGE_PRESENT (1<<10) /* TLB entry is valid (H) */ @@ -72,6 +73,7 @@ #define _PAGE_READ (1<<3) /* Page has user read perm (H) */ #define _PAGE_ACCESSED (1<<4) /* Page is accessed (S) */ #define _PAGE_DIRTY (1<<5) /* Page modified (dirty) (S) */ +#define _PAGE_SPECIAL (1<<6) #if (CONFIG_ARC_MMU_VER >= 4) #define _PAGE_WTHRU (1<<7) /* Page cache mode write-thru (H) */ @@ -292,7 +294,7 @@ static inline void pmd_set(pmd_t *pmdp, pte_t *ptep) #define pte_write(pte) (pte_val(pte) & _PAGE_WRITE) #define pte_dirty(pte) (pte_val(pte) & _PAGE_DIRTY) #define pte_young(pte) (pte_val(pte) & _PAGE_ACCESSED) -#define pte_special(pte) (0) +#define pte_special(pte) (pte_val(pte) & _PAGE_SPECIAL) #define PTE_BIT_FUNC(fn, op) \ static inline pte_t pte_##fn(pte_t pte) { pte_val(pte) op; return pte; } @@ -305,8 +307,9 @@ PTE_BIT_FUNC(mkold, &= ~(_PAGE_ACCESSED)); PTE_BIT_FUNC(mkyoung, |= (_PAGE_ACCESSED)); PTE_BIT_FUNC(exprotect, &= ~(_PAGE_EXECUTE)); PTE_BIT_FUNC(mkexec, |= (_PAGE_EXECUTE)); +PTE_BIT_FUNC(mkspecial, |= (_PAGE_SPECIAL)); -static inline pte_t pte_mkspecial(pte_t pte) { return pte; } +#define __HAVE_ARCH_PTE_SPECIAL static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) { |