ceph: remove superfluous inode_lock in ceph_fsync

Originally, filemap_write_and_wait took the i_mutex internally, but
commit 02c24a82187d pushed the mutex acquisition into the individual
fsync routines, leaving it up to the subsystem maintainers to remove
it if it wasn't needed.

For ceph, I see no reason to take the inode_lock here. All of the
operations inside that lock are protected by their own locking.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

1 files changed, 0 insertions, 3 deletions

diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 36a8dc699448..f976939f771f 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -2257,8 +2257,6 @@ int ceph_fsync(struct file *file, loff_t start, loff_t end, int datasync)
         if (datasync)
                 goto out;
 
-        inode_lock(inode);
-
         dirty = try_flush_caps(inode, &flush_tid);
         dout("fsync dirty caps are %s\n", ceph_cap_string(dirty));
 
@@ -2273,7 +2271,6 @@ int ceph_fsync(struct file *file, loff_t start, loff_t end, int datasync)
                 ret = wait_event_interruptible(ci->i_cap_wq,
                                         caps_are_flushed(inode, flush_tid));
         }
-        inode_unlock(inode);
 out:
         dout("fsync %p%s result=%d\n", inode, datasync ? " datasync" : "", ret);
         return ret;