Sync syscall to DAX file needs to flush processor cache, but it currently does not flush to existing DAX files. This is because 'ext2_da_aops' is set to address_space_operations of existing DAX files, instead of 'ext2_dax_aops', since S_DAX flag is set after ext2_set_aops() in the open path.
Similar to ext4, change ext2_iget() to initialize i_flags before ext2_set_aops().
Fixes: fb094c90748f ("ext2, dax: introduce ext2_dax_aops") Signed-off-by: Toshi Kani toshi.kani@hpe.com Suggested-by: Jan Kara jack@suse.cz Cc: Jan Kara jack@suse.cz Cc: Dan Williams dan.j.williams@intel.com Cc: "Theodore Ts'o" tytso@mit.edu Cc: Andreas Dilger adilger.kernel@dilger.ca Cc: stable@vger.kernel.org --- fs/ext2/inode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c index 7f7ee18fe179..e4bb9386c045 100644 --- a/fs/ext2/inode.c +++ b/fs/ext2/inode.c @@ -1448,6 +1448,7 @@ struct inode *ext2_iget (struct super_block *sb, unsigned long ino) } inode->i_blocks = le32_to_cpu(raw_inode->i_blocks); ei->i_flags = le32_to_cpu(raw_inode->i_flags); + ext2_set_inode_flags(inode); ei->i_faddr = le32_to_cpu(raw_inode->i_faddr); ei->i_frag_no = raw_inode->i_frag; ei->i_frag_size = raw_inode->i_fsize; @@ -1517,7 +1518,6 @@ struct inode *ext2_iget (struct super_block *sb, unsigned long ino) new_decode_dev(le32_to_cpu(raw_inode->i_block[1]))); } brelse (bh); - ext2_set_inode_flags(inode); unlock_new_inode(inode); return inode;