1dnl #
2dnl # 4.7 API change
3dnl # i_mutex is changed to i_rwsem. Instead of directly using
4dnl # i_mutex/i_rwsem, we should use inode_lock() and inode_lock_shared()
5dnl # We test inode_lock_shared because inode_lock is introduced earlier.
6dnl #
7AC_DEFUN([ZFS_AC_KERNEL_SRC_INODE_LOCK], [
8	ZFS_LINUX_TEST_SRC([inode_lock], [
9		#include <linux/fs.h>
10	],[
11		struct inode *inode = NULL;
12		inode_lock_shared(inode);
13	])
14])
15
16AC_DEFUN([ZFS_AC_KERNEL_INODE_LOCK], [
17	AC_MSG_CHECKING([whether inode_lock_shared() exists])
18	ZFS_LINUX_TEST_RESULT([inode_lock], [
19		AC_MSG_RESULT(yes)
20		AC_DEFINE(HAVE_INODE_LOCK_SHARED, 1, [yes])
21	],[
22		AC_MSG_RESULT(no)
23	])
24])
25