[PATCH 1/2] nfs: replace atomic bitops sequence with clear_and_wake_up_bit helper

[Arnaud Bonnet]

Commit 8236b0ae31c83 ("bdi: wake up concurrent wb_shutdown() callers.")
introduces the clear_and_wake_up_bit() helper as a wrapper for the
common clear -> barrier -> wake up bitops sequence.

Use the helper in nfs_clear_invalid_mapping as inode.c already relies
on functions from <linux/wait_bit.h> and to homogenize with other
subsystems.

Suggested-by: Agatha Isabelle Moreira <code@xxxxxxxxxx>
Link: https://kernelnewbies.org/Beginner%20Cleanup%20and%20Refactor%20Tasks%20by%20Agatha%20Isabelle%20Moreira#task_007
Signed-off-by: Arnaud Bonnet <abo@xxxxxxxxxxx>
---
 fs/nfs/inode.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index e26030e73696..9c74de557592 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -1542,9 +1542,7 @@ int nfs_clear_invalid_mapping(struct address_space *mapping)
 	ret = nfs_invalidate_mapping(inode, mapping);
 	trace_nfs_invalidate_mapping_exit(inode, ret);
 
-	clear_bit_unlock(NFS_INO_INVALIDATING, bitlock);
-	smp_mb__after_atomic();
-	wake_up_bit(bitlock, NFS_INO_INVALIDATING);
+	clear_and_wake_up_bit(NFS_INO_INVALIDATING, bitlock);
 out:
 	return ret;
 }
-- 
2.53.0