ext4: Use direct_IO_no_locking in ext4 dio read.
Signed-off-by: Jiaying Zhang <jiayingz@xxxxxxxxxx>
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 9ee3550..44d2e19 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3395,7 +3395,15 @@ static ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb,
}
retry:
- ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
+ if (rw == READ && test_opt(inode->i_sb, DIOREAD_NOLOCK)
+ && (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL))
+ ret = blockdev_direct_IO_no_locking(rw, iocb, inode,
+ inode->i_sb->s_bdev, iov,
+ offset, nr_segs,
+ ext4_get_block, NULL);
+ else
+ ret = blockdev_direct_IO(rw, iocb, inode,
+ inode->i_sb->s_bdev, iov,
offset, nr_segs,
ext4_get_block, NULL);
if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
--
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