btrfs uses generic_file_read_iter(), which already supports this. Acked-by: Chris Mason <clm@xxxxxx> Signed-off-by: Jens Axboe <axboe@xxxxxxxxx> --- fs/btrfs/file.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index 2c14312b05e8..234a418eb6da 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -3472,7 +3472,7 @@ static loff_t btrfs_file_llseek(struct file *file, loff_t offset, int whence) static int btrfs_file_open(struct inode *inode, struct file *filp) { - filp->f_mode |= FMODE_NOWAIT; + filp->f_mode |= FMODE_NOWAIT | FMODE_BUF_RASYNC; return generic_file_open(inode, filp); } -- 2.27.0