1AC_DEFUN([ZFS_AC_KERNEL_SRC_PERMISSION], [
2	dnl #
3	dnl # 5.12 API change that added the struct user_namespace* arg
4	dnl # to the front of this function type's arg list.
5	dnl #
6	ZFS_LINUX_TEST_SRC([permission_userns], [
7		#include <linux/fs.h>
8		#include <linux/sched.h>
9
10		int inode_permission(struct user_namespace *userns,
11		    struct inode *inode, int mask) { return 0; }
12
13		static const struct inode_operations
14			iops __attribute__ ((unused)) = {
15			.permission		= inode_permission,
16		};
17	],[])
18])
19
20AC_DEFUN([ZFS_AC_KERNEL_PERMISSION], [
21	AC_MSG_CHECKING([whether iops->permission() takes struct user_namespace*])
22	ZFS_LINUX_TEST_RESULT([permission_userns], [
23		AC_MSG_RESULT(yes)
24		AC_DEFINE(HAVE_IOPS_PERMISSION_USERNS, 1,
25		   [iops->permission() takes struct user_namespace*])
26	],[
27		AC_MSG_RESULT(no)
28	])
29])
30