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authorVineet Gupta <vgupta@synopsys.com>2015-02-16 16:31:29 +0300
committerVineet Gupta <vgupta@synopsys.com>2015-10-09 14:34:23 +0300
commit24830fc782a3a740209d39cb27abbf5a9763f61f (patch)
tree76478dc1c698fd8103c183219af9ba7728051e4d /arch/arc
parent129cbed54a8b3f80f0eaf49acb14fe835587f6f3 (diff)
downloadlinux-24830fc782a3a740209d39cb27abbf5a9763f61f.tar.xz
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.h7
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)
{