1dnl #
2dnl # 3.16 API Change
3dnl #
4dnl # rwsem-spinlock "->activity" changed to "->count"
5dnl #
6AC_DEFUN([ZFS_AC_KERNEL_SRC_RWSEM_ACTIVITY], [
7	ZFS_LINUX_TEST_SRC([rwsem_activity], [
8		#include <linux/rwsem.h>
9	],[
10		struct rw_semaphore dummy_semaphore __attribute__ ((unused));
11		dummy_semaphore.activity = 0;
12	])
13])
14
15AC_DEFUN([ZFS_AC_KERNEL_RWSEM_ACTIVITY], [
16	AC_MSG_CHECKING([whether struct rw_semaphore has member activity])
17	ZFS_LINUX_TEST_RESULT([rwsem_activity], [
18		AC_MSG_RESULT(yes)
19		AC_DEFINE(HAVE_RWSEM_ACTIVITY, 1,
20		    [struct rw_semaphore has member activity])
21	],[
22		AC_MSG_RESULT(no)
23	])
24])
25
26dnl #
27dnl # 4.8 API Change
28dnl #
29dnl # rwsem "->count" changed to atomic_long_t type
30dnl #
31AC_DEFUN([ZFS_AC_KERNEL_SRC_RWSEM_ATOMIC_LONG_COUNT], [
32	ZFS_LINUX_TEST_SRC([rwsem_atomic_long_count], [
33		#include <linux/rwsem.h>
34	],[
35		DECLARE_RWSEM(dummy_semaphore);
36		(void) atomic_long_read(&dummy_semaphore.count);
37	])
38])
39
40AC_DEFUN([ZFS_AC_KERNEL_RWSEM_ATOMIC_LONG_COUNT], [
41	AC_MSG_CHECKING(
42	    [whether struct rw_semaphore has atomic_long_t member count])
43	ZFS_LINUX_TEST_RESULT([rwsem_atomic_long_count], [
44		AC_MSG_RESULT(yes)
45		AC_DEFINE(HAVE_RWSEM_ATOMIC_LONG_COUNT, 1,
46		    [struct rw_semaphore has atomic_long_t member count])
47	],[
48		AC_MSG_RESULT(no)
49	])
50])
51
52AC_DEFUN([ZFS_AC_KERNEL_SRC_RWSEM], [
53	ZFS_AC_KERNEL_SRC_RWSEM_ACTIVITY
54	ZFS_AC_KERNEL_SRC_RWSEM_ATOMIC_LONG_COUNT
55])
56
57AC_DEFUN([ZFS_AC_KERNEL_RWSEM], [
58	ZFS_AC_KERNEL_RWSEM_ACTIVITY
59	ZFS_AC_KERNEL_RWSEM_ATOMIC_LONG_COUNT
60])
61