fs: provide rcu-walk aware permission i_ops

[karo-tx-linux.git] / fs / generic_acl.c

diff --git a/fs/generic_acl.c b/fs/generic_acl.c
index 6bc9e3a5a693b0fa2d5d8f09349f42b9d44ea72f..628004282130029d3d9b7bf06707a48161abe599 100644 (file)
--- a/fs/generic_acl.c
+++ b/fs/generic_acl.c
@@ -190,10 +190,14 @@ generic_acl_chmod(struct inode *inode)
 }
 
 int
-generic_check_acl(struct inode *inode, int mask)
+generic_check_acl(struct inode *inode, int mask, unsigned int flags)
 {
-       struct posix_acl *acl = get_cached_acl(inode, ACL_TYPE_ACCESS);
+       struct posix_acl *acl;
+
+       if (flags & IPERM_FLAG_RCU)
+               return -ECHILD;
 
+       acl = get_cached_acl(inode, ACL_TYPE_ACCESS);
        if (acl) {
                int error = posix_acl_permission(inode, acl, mask);
                posix_acl_release(acl);