commit 2ba48ce513c4e545318d22b138861d5876edf906
author Al Viro <viro@zeniv.linux.org.uk> Thu Apr 09 13:52:01 2015 -0400
committer Al Viro <viro@zeniv.linux.org.uk> Sat Apr 11 22:30:22 2015 -0400
tree 0e2a5130ead5c71f0b079b1acd620fba98f99256
parent 3309dd04cbcd2cdad168485af5cf3576b5051e49

mirror O_APPEND and O_DIRECT into iocb->ki_flags

... avoiding write_iter/fcntl races.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/btrfs/file.c

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index c64d11c..faa7d39 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1794,7 +1794,7 @@
 	if (sync)
 		atomic_inc(&BTRFS_I(inode)->sync_writers);
 
-	if (file->f_flags & O_DIRECT) {
+	if (iocb->ki_flags & IOCB_DIRECT) {
 		num_written = __btrfs_direct_write(iocb, from, pos);
 	} else {
 		num_written = __btrfs_buffered_write(file, from, pos);