shmfs: use 'check_acl' instead of 'permission'

shmfs wants purely standard POSIX ACL semantics, so we can use the new
generic VFS layer POSIX ACL checking rather than cooking our own
'permission()' function.

Reviewed-by: James Morris <jmorris@namei.org>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/shmem.c b/mm/shmem.c
index d713239..5a0b3d4 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -2446,7 +2446,7 @@
 	.getxattr	= generic_getxattr,
 	.listxattr	= generic_listxattr,
 	.removexattr	= generic_removexattr,
-	.permission	= shmem_permission,
+	.check_acl	= shmem_check_acl,
 #endif
 
 };
@@ -2469,7 +2469,7 @@
 	.getxattr	= generic_getxattr,
 	.listxattr	= generic_listxattr,
 	.removexattr	= generic_removexattr,
-	.permission	= shmem_permission,
+	.check_acl	= shmem_check_acl,
 #endif
 };
 
@@ -2480,7 +2480,7 @@
 	.getxattr	= generic_getxattr,
 	.listxattr	= generic_listxattr,
 	.removexattr	= generic_removexattr,
-	.permission	= shmem_permission,
+	.check_acl	= shmem_check_acl,
 #endif
 };