[PATCH v5 08/12] sparc: add pmd_[dirty|mkclean] for THP
From: Minchan Kim <minchan@kernel.org>
Date: 2015-11-30 06:40:04
Also in:
linux-mm, lkml
Subsystem:
sparc + ultrasparc (sparc/sparc64), the rest · Maintainers:
"David S. Miller", Andreas Larsson, 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. Signed-off-by: Minchan Kim <minchan@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> --- arch/sparc/include/asm/pgtable_64.h | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h
index f5bfcd66aeb5..7a38d6a576c5 100644
--- a/arch/sparc/include/asm/pgtable_64.h
+++ b/arch/sparc/include/asm/pgtable_64.h@@ -710,6 +710,15 @@ static inline pmd_t pmd_mkdirty(pmd_t pmd) return __pmd(pte_val(pte)); } +static inline pmd_t pmd_mkclean(pmd_t pmd) +{ + pte_t pte = __pte(pmd_val(pmd)); + + pte = pte_mkclean(pte); + + return __pmd(pte_val(pte)); +} + static inline pmd_t pmd_mkyoung(pmd_t pmd) { pte_t pte = __pte(pmd_val(pmd));
--
1.9.1
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