[PATCH v2 02/11] mm: add pmd_mkclean()
From: Ross Zwisler <hidden>
Date: 2015-11-14 00:06:41
Also in:
linux-fsdevel, linux-mm, linux-xfs, lkml, nvdimm
Subsystem:
the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
Currently PMD pages can be dirtied via pmd_mkdirty(), but cannot be cleaned. For DAX mmap dirty page tracking we need to be able to clean PMD pages when we flush them to media so that we get a new write fault the next time the are written to. Signed-off-by: Ross Zwisler <redacted> --- arch/x86/include/asm/pgtable.h | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 867da5b..c548e4c 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h@@ -277,6 +277,11 @@ static inline pmd_t pmd_mkdirty(pmd_t pmd) return pmd_set_flags(pmd, _PAGE_DIRTY | _PAGE_SOFT_DIRTY); } +static inline pmd_t pmd_mkclean(pmd_t pmd) +{ + return pmd_clear_flags(pmd, _PAGE_DIRTY | _PAGE_SOFT_DIRTY); +} + static inline pmd_t pmd_mkhuge(pmd_t pmd) { return pmd_set_flags(pmd, _PAGE_PSE);
--
2.1.0
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