From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ross Zwisler Subject: [RFC 02/11] mm: add pmd_mkclean() Date: Thu, 29 Oct 2015 14:12:06 -0600 Message-ID: <1446149535-16200-3-git-send-email-ross.zwisler@linux.intel.com> References: <1446149535-16200-1-git-send-email-ross.zwisler@linux.intel.com> Cc: Ross Zwisler , "H. Peter Anvin" , "J. Bruce Fields" , "Theodore Ts'o" , Alexander Viro , Andreas Dilger , Dan Williams , Dave Chinner , Ingo Molnar , Jan Kara , Jeff Layton , Matthew Wilcox , Thomas Gleixner , linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-nvdimm@lists.01.org, x86@kernel.org, xfs@oss.sgi.com, Andrew Morton , Matthew Wilcox To: linux-kernel@vger.kernel.org Return-path: In-Reply-To: <1446149535-16200-1-git-send-email-ross.zwisler@linux.intel.com> Sender: owner-linux-mm@kvack.org List-Id: linux-fsdevel.vger.kernel.org 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 --- 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, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org