[mirror_zfs.git] / config / kernel-zero_page.m4

dnl #
dnl # ZERO_PAGE() is an alias for emtpy_zero_page. On certain architectures
dnl # this is a GPL exported variable.
dnl #

dnl #
dnl # Checking if ZERO_PAGE is exported GPL-only
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_ZERO_PAGE], [
	ZFS_LINUX_TEST_SRC([zero_page], [
		#include <asm/pgtable.h>
	], [
		struct page *p __attribute__ ((unused));
		p = ZERO_PAGE(0);
	], [], [ZFS_META_LICENSE])
])

AC_DEFUN([ZFS_AC_KERNEL_ZERO_PAGE], [
	AC_MSG_CHECKING([whether ZERO_PAGE() is GPL-only])
	ZFS_LINUX_TEST_RESULT([zero_page_license], [
		AC_MSG_RESULT(no)
	], [
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_ZERO_PAGE_GPL_ONLY, 1,
		    [ZERO_PAGE() is GPL-only])
	])
])
Commit	Line	Data
becc717f BA	1	dnl #
	2	dnl # ZERO_PAGE() is an alias for emtpy_zero_page. On certain architectures
	3	dnl # this is a GPL exported variable.
	4	dnl #
	5
	6	dnl #
	7	dnl # Checking if ZERO_PAGE is exported GPL-only
	8	dnl #
	9	AC_DEFUN([ZFS_AC_KERNEL_SRC_ZERO_PAGE], [
	10	ZFS_LINUX_TEST_SRC([zero_page], [
	11	#include <asm/pgtable.h>
	12	], [
	13	struct page *p __attribute__ ((unused));
	14	p = ZERO_PAGE(0);
	15	], [], [ZFS_META_LICENSE])
	16	])
	17
	18	AC_DEFUN([ZFS_AC_KERNEL_ZERO_PAGE], [
	19	AC_MSG_CHECKING([whether ZERO_PAGE() is GPL-only])
	20	ZFS_LINUX_TEST_RESULT([zero_page_license], [
	21	AC_MSG_RESULT(no)
	22	], [
	23	AC_MSG_RESULT(yes)
	24	AC_DEFINE(HAVE_ZERO_PAGE_GPL_ONLY, 1,
	25	[ZERO_PAGE() is GPL-only])
	26	])
	27	])