generic_file_fsync has been updated to issue a flush for
older filesystems.
This patch tests for barrier flag in ext4 mount flags
and calls the right function.
Suggested-by: Jan Kara <j...@suse.cz>
Suggested-by: Christoph Hellwig <h...@infradead.org>
Cc: Jan Kara <j...@suse.cz>
Cc: Christoph Hellwig <h...@infradead.org>
Cc: Alexander Viro <v...@zeniv.linux.org.uk>
Cc: "Theodore Ts'o" <ty...@mit.edu>
Cc: Andrew Morton <a...@linux-foundation.org>
Signed-off-by: Fabian Frederick <f...@skynet.be>
---
fs/ext4/fsync.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c
index a8bc47f..fa82c0a 100644
--- a/fs/ext4/fsync.c
+++ b/fs/ext4/fsync.c
@@ -108,6 +108,10 @@ int ext4_sync_file(struct file *file, loff_t start, loff_t
end, int datasync)
if (!journal) {
ret = generic_file_fsync(file, start, end, datasync);
+ if (test_opt(inode->i_sb, BARRIER))
+ ret = generic_file_fsync(file, start, end, datasync);
+ else
+ ret = __generic_file_fsync(file, start, end, datasync);
if (!ret && !hlist_empty(&inode->i_dentry))
ret = ext4_sync_parent(inode);
goto out;
--
1.8.4.5
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