NFS: Fix an Oops in the nfs_access_cache_shrinker()
The nfs_access_cache_shrinker may race with nfs_access_zap_cache().
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 0f41678..322141f 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1743,8 +1743,8 @@
struct nfs_inode *nfsi;
struct nfs_access_entry *cache;
- spin_lock(&nfs_access_lru_lock);
restart:
+ spin_lock(&nfs_access_lru_lock);
list_for_each_entry(nfsi, &nfs_access_lru_list, access_cache_inode_lru) {
struct inode *inode;
@@ -1769,6 +1769,7 @@
clear_bit(NFS_INO_ACL_LRU_SET, &nfsi->flags);
}
spin_unlock(&inode->i_lock);
+ spin_unlock(&nfs_access_lru_lock);
iput(inode);
goto restart;
}