1dnl #
2dnl # 4.14 API change
3dnl # kernel_write() which was introduced in 3.9 was updated to take
4dnl # the offset as a pointer which is needed by vn_rdwr().
5dnl #
6AC_DEFUN([ZFS_AC_KERNEL_SRC_WRITE], [
7	ZFS_LINUX_TEST_SRC([kernel_write], [
8		#include <linux/fs.h>
9	],[
10		struct file *file = NULL;
11		const void *buf = NULL;
12		size_t count = 0;
13		loff_t *pos = NULL;
14		ssize_t ret;
15
16		ret = kernel_write(file, buf, count, pos);
17	])
18])
19
20AC_DEFUN([ZFS_AC_KERNEL_WRITE], [
21	AC_MSG_CHECKING([whether kernel_write() takes loff_t pointer])
22	ZFS_LINUX_TEST_RESULT([kernel_write], [
23		AC_MSG_RESULT(yes)
24		AC_DEFINE(HAVE_KERNEL_WRITE_PPOS, 1,
25		    [kernel_write() take loff_t pointer])
26	],[
27		AC_MSG_RESULT(no)
28	])
29])
30
31dnl #
32dnl # 4.14 API change
33dnl # kernel_read() which has existed for forever was updated to take
34dnl # the offset as a pointer which is needed by vn_rdwr().
35dnl #
36AC_DEFUN([ZFS_AC_KERNEL_SRC_READ], [
37	ZFS_LINUX_TEST_SRC([kernel_read], [
38		#include <linux/fs.h>
39	],[
40		struct file *file = NULL;
41		void *buf = NULL;
42		size_t count = 0;
43		loff_t *pos = NULL;
44		ssize_t ret;
45
46		ret = kernel_read(file, buf, count, pos);
47	])
48])
49
50AC_DEFUN([ZFS_AC_KERNEL_READ], [
51	AC_MSG_CHECKING([whether kernel_read() takes loff_t pointer])
52	ZFS_LINUX_TEST_RESULT([kernel_read], [
53		AC_MSG_RESULT(yes)
54		AC_DEFINE(HAVE_KERNEL_READ_PPOS, 1,
55		    [kernel_read() take loff_t pointer])
56	],[
57		AC_MSG_RESULT(no)
58	])
59])
60
61AC_DEFUN([ZFS_AC_KERNEL_SRC_RW], [
62	ZFS_AC_KERNEL_SRC_WRITE
63	ZFS_AC_KERNEL_SRC_READ
64])
65
66AC_DEFUN([ZFS_AC_KERNEL_RW], [
67	ZFS_AC_KERNEL_WRITE
68	ZFS_AC_KERNEL_READ
69])
70