fs: provide rcu-walk aware permission i_ops
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
diff --git a/fs/generic_acl.c b/fs/generic_acl.c
index 6bc9e3a..6280042 100644
--- a/fs/generic_acl.c
+++ b/fs/generic_acl.c
@@ -190,10 +190,14 @@
}
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);