[PATCH 3/3] btrfs: remove redundant nowait check for buffered_write

[Lu Fengqi]

The generic_write_checks will check the combination of IOCB_NOWAIT and
!IOCB_DIRECT.

Signed-off-by: Lu Fengqi <lufq.f...@cn.fujitsu.com>
---
 fs/btrfs/file.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 3835bb8c146d..190db9a685a2 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1889,10 +1889,6 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
        loff_t oldsize;
        int clean_page = 0;
 
-       if (!(iocb->ki_flags & IOCB_DIRECT) &&
-           (iocb->ki_flags & IOCB_NOWAIT))
-               return -EOPNOTSUPP;
-
        if (!inode_trylock(inode)) {
                if (iocb->ki_flags & IOCB_NOWAIT)
                        return -EAGAIN;
-- 
2.19.2