[PATCH v13 6/8] arm: add pmd_[dirty|mkclean] for THP
From: minchan@kernel.org (Minchan Kim)
Date: 2014-07-18 06:53:40
Also in:
linux-api, linux-mm, lkml
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
MADV_FREE needs pmd_dirty and pmd_mkclean for detecting recent overwrite of the contents since MADV_FREE syscall is called for THP page. This patch adds pmd_dirty and pmd_mkclean for THP page MADV_FREE support. Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <redacted> Cc: Steve Capper <redacted> Cc: Russell King <redacted> Cc: linux-arm-kernel at lists.infradead.org Signed-off-by: Minchan Kim <minchan@kernel.org> --- arch/arm/include/asm/pgtable-3level.h | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/arch/arm/include/asm/pgtable-3level.h b/arch/arm/include/asm/pgtable-3level.h
index 85c60adc8b60..830f84f2d277 100644
--- a/arch/arm/include/asm/pgtable-3level.h
+++ b/arch/arm/include/asm/pgtable-3level.h@@ -220,6 +220,8 @@ static inline pmd_t *pmd_offset(pud_t *pud, unsigned long addr) #define pmd_trans_splitting(pmd) (pmd_val(pmd) & PMD_SECT_SPLITTING) #endif +#define pmd_dirty(pmd) (pmd_val(pmd) & PMD_SECT_DIRTY) + #define PMD_BIT_FUNC(fn,op) \ static inline pmd_t pmd_##fn(pmd_t pmd) { pmd_val(pmd) op; return pmd; }
@@ -228,6 +230,7 @@ PMD_BIT_FUNC(mkold, &= ~PMD_SECT_AF); PMD_BIT_FUNC(mksplitting, |= PMD_SECT_SPLITTING); PMD_BIT_FUNC(mkwrite, &= ~PMD_SECT_RDONLY); PMD_BIT_FUNC(mkdirty, |= PMD_SECT_DIRTY); +PMD_BIT_FUNC(mkclean, &= ~PMD_SECT_DIRTY); PMD_BIT_FUNC(mkyoung, |= PMD_SECT_AF); #define pmd_mkhuge(pmd) (__pmd(pmd_val(pmd) & ~PMD_TABLE_BIT))
--
2.0.0