1dnl #
2dnl # 5.3 API change
3dnl # The generic_fadvise() function is present since 4.19 kernel
4dnl # but it was not exported until Linux 5.3.
5dnl #
6AC_DEFUN([ZFS_AC_KERNEL_SRC_GENERIC_FADVISE], [
7	ZFS_LINUX_TEST_SRC([generic_fadvise], [
8		#include <linux/fs.h>
9	], [
10		struct file *fp __attribute__ ((unused)) = NULL;
11		loff_t offset __attribute__ ((unused)) = 0;
12		loff_t len __attribute__ ((unused)) = 0;
13		int advise __attribute__ ((unused)) = 0;
14		generic_fadvise(fp, offset, len, advise);
15	])
16])
17
18AC_DEFUN([ZFS_AC_KERNEL_GENERIC_FADVISE], [
19	AC_MSG_CHECKING([whether generic_fadvise() is available])
20	ZFS_LINUX_TEST_RESULT_SYMBOL([generic_fadvise],
21	[generic_fadvise], [mm/fadvise.c], [
22		AC_MSG_RESULT(yes)
23		AC_DEFINE(HAVE_GENERIC_FADVISE, 1, [yes])
24	],[
25		AC_MSG_RESULT(no)
26	])
27])
28