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

dnl #
dnl # Starting from Linux 5.13, flush_dcache_page() becomes an inline
dnl # function and may indirectly referencing GPL-only symbols:
dnl # on powerpc: cpu_feature_keys
dnl # on riscv: PageHuge (added from 6.2)
dnl #

dnl #
dnl # Checking if flush_dcache_page is exported GPL-only
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_FLUSH_DCACHE_PAGE], [
	ZFS_LINUX_TEST_SRC([flush_dcache_page], [
		#include <asm/cacheflush.h>
	], [
		flush_dcache_page(0);
	], [], [ZFS_META_LICENSE])
])
AC_DEFUN([ZFS_AC_KERNEL_FLUSH_DCACHE_PAGE], [
	AC_MSG_CHECKING([whether flush_dcache_page() is GPL-only])
	ZFS_LINUX_TEST_RESULT([flush_dcache_page_license], [
		AC_MSG_RESULT(no)
	], [
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_FLUSH_DCACHE_PAGE_GPL_ONLY, 1,
		    [flush_dcache_page() is GPL-only])
	])
])
Commit	Line	Data
589f59b5 W	1	dnl #
589f59b5 W	2	dnl # Starting from Linux 5.13, flush_dcache_page() becomes an inline
86239a5b SC	3	dnl # function and may indirectly referencing GPL-only symbols:
	4	dnl # on powerpc: cpu_feature_keys
	5	dnl # on riscv: PageHuge (added from 6.2)
589f59b5 W	6	dnl #
	7
	8	dnl #
	9	dnl # Checking if flush_dcache_page is exported GPL-only
	10	dnl #
	11	AC_DEFUN([ZFS_AC_KERNEL_SRC_FLUSH_DCACHE_PAGE], [
	12	ZFS_LINUX_TEST_SRC([flush_dcache_page], [
	13	#include <asm/cacheflush.h>
	14	], [
	15	flush_dcache_page(0);
	16	], [], [ZFS_META_LICENSE])
	17	])
	18	AC_DEFUN([ZFS_AC_KERNEL_FLUSH_DCACHE_PAGE], [
	19	AC_MSG_CHECKING([whether flush_dcache_page() is GPL-only])
	20	ZFS_LINUX_TEST_RESULT([flush_dcache_page_license], [
	21	AC_MSG_RESULT(no)
	22	], [
	23	AC_MSG_RESULT(yes)
	24	AC_DEFINE(HAVE_FLUSH_DCACHE_PAGE_GPL_ONLY, 1,
	25	[flush_dcache_page() is GPL-only])
	26	])
	27	])