From: Matthew Wilcox Date: Tue, 8 Sep 2015 21:59:20 +0000 (-0700) Subject: ext4: add ext4_get_block_dax() X-Git-Tag: omap-for-v4.3/fixes-rc1~54^2~120 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ed923b5776a2d2e949bd5b20f3956d68f3c826b7;p=pandora-kernel.git ext4: add ext4_get_block_dax() DAX wants different semantics from any currently-existing ext4 get_block callback. Unlike ext4_get_block_write(), it needs to honour the 'create' flag, and unlike ext4_get_block(), it needs to be able to return unwritten extents. So introduce a new ext4_get_block_dax() which has those semantics. We could also change ext4_get_block_write() to honour the 'create' flag, but that might have consequences on other users that I do not currently understand. Signed-off-by: Matthew Wilcox Cc: Theodore Ts'o Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 32071f5c1c26..fd1f28be5296 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -2272,6 +2272,8 @@ struct buffer_head *ext4_getblk(handle_t *, struct inode *, ext4_lblk_t, int); struct buffer_head *ext4_bread(handle_t *, struct inode *, ext4_lblk_t, int); int ext4_get_block_write(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create); +int ext4_get_block_dax(struct inode *inode, sector_t iblock, + struct buffer_head *bh_result, int create); int ext4_get_block(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create); int ext4_da_get_block_prep(struct inode *inode, sector_t iblock, Reading git-diff-tree failed