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Date: Fri, 13 Nov 2015 17:06:41 -0700 From: Ross Zwisler <ross.zwisler@...ux.intel.com> To: linux-kernel@...r.kernel.org Cc: Ross Zwisler <ross.zwisler@...ux.intel.com>, "H. Peter Anvin" <hpa@...or.com>, "J. Bruce Fields" <bfields@...ldses.org>, "Theodore Ts'o" <tytso@....edu>, Alexander Viro <viro@...iv.linux.org.uk>, Andreas Dilger <adilger.kernel@...ger.ca>, Dan Williams <dan.j.williams@...el.com>, Dave Chinner <david@...morbit.com>, Ingo Molnar <mingo@...hat.com>, Jan Kara <jack@...e.com>, Jeff Layton <jlayton@...chiereds.net>, Matthew Wilcox <willy@...ux.intel.com>, Thomas Gleixner <tglx@...utronix.de>, linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org, linux-mm@...ck.org, linux-nvdimm@...ts.01.org, x86@...nel.org, xfs@....sgi.com, Andrew Morton <akpm@...ux-foundation.org>, Matthew Wilcox <matthew.r.wilcox@...el.com>, Dave Hansen <dave.hansen@...ux.intel.com> Subject: [PATCH v2 02/11] mm: add pmd_mkclean() 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 <ross.zwisler@...ux.intel.com> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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