[PATCH v12 3/8] sparc: add pmd_[dirty|mkclean] for THP
From: Minchan Kim <minchan@kernel.org>
Date: 2014-07-09 06:23:53
Also in:
linux-mm, lkml, sparclinux
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. Cc: "David S. Miller" <davem@davemloft.net> Cc: sparclinux@vger.kernel.org Signed-off-by: Minchan Kim <minchan@kernel.org> --- arch/sparc/include/asm/pgtable_64.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h
index 3770bf5c6e1b..b80a309d7e00 100644
--- a/arch/sparc/include/asm/pgtable_64.h
+++ b/arch/sparc/include/asm/pgtable_64.h@@ -666,6 +666,13 @@ static inline unsigned long pmd_young(pmd_t pmd) return pte_young(pte); } +static inline int pmd_dirty(pmd_t pmd) +{ + pte_t pte = __pte(pmd_val(pmd)); + + return pte_dirty(pte); +} + static inline unsigned long pmd_write(pmd_t pmd) { pte_t pte = __pte(pmd_val(pmd));
@@ -723,6 +730,15 @@ 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));
--
2.0.0
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