[PATCH] fs/dcache: prevent repeated locking

[cgel . zte]

From: Lv Ruyi <lv.ruyi@xxxxxxxxxx>

Move the spin_lock above the restart to prevent to lock twice 
when the code goto restart.

Reported-by: Zeal Robot <zealci@xxxxxxxxxx>
Signed-off-by: Lv Ruyi <lv.ruyi@xxxxxxxxxx>
---
 fs/dcache.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/dcache.c b/fs/dcache.c
index c84269c6e8bf..8580d51b397a 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1102,8 +1102,8 @@ struct dentry *d_find_alias_rcu(struct inode *inode)
 void d_prune_aliases(struct inode *inode)
 {
 	struct dentry *dentry;
-restart:
 	spin_lock(&inode->i_lock);
+restart:
 	hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) {
 		spin_lock(&dentry->d_lock);
 		if (!dentry->d_lockref.count) {
-- 
2.25.1