diff mbox

[v13,3/8] sparc: add pmd_[dirty|mkclean] for THP

Message ID 1405666386-15095-4-git-send-email-minchan@kernel.org
State Not Applicable
Delegated to: David Miller
Headers show

Commit Message

Minchan Kim July 18, 2014, 6:53 a.m. UTC 
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(+)
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Patch

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));