1 files changed, 19 insertions, 0 deletions

diff --git a/include/linux/posix_acl.h b/include/linux/posix_acl.h
index 67608161df6b..d68283a898bb 100644
--- a/include/linux/posix_acl.h
+++ b/include/linux/posix_acl.h
@@ -108,6 +108,25 @@ static inline struct posix_acl *get_cached_acl(struct inode *inode, int type)
         return acl;
 }
 
+static inline int negative_cached_acl(struct inode *inode, int type)
+{
+        struct posix_acl **p, *acl;
+        switch (type) {
+        case ACL_TYPE_ACCESS:
+                p = &inode->i_acl;
+                break;
+        case ACL_TYPE_DEFAULT:
+                p = &inode->i_default_acl;
+                break;
+        default:
+                BUG();
+        }
+        acl = ACCESS_ONCE(*p);
+        if (acl)
+                return 0;
+        return 1;
+}
+
 static inline void set_cached_acl(struct inode *inode,
                                   int type,
                                   struct posix_acl *acl)