dnl #
dnl # commit v5.3-rc1-29-g2c7933f53f6b
dnl # mm/mmu_notifiers: add a get/put scheme for the registration
dnl #
dnl # amdkcl: mmu_notifier_put() & mmu_notifier_synchronize() is
dnl # introduced in the same commit, yet rhel7.7 has different behavior
dnl #
AC_DEFUN([AC_AMDGPU_MMU_NOTIFIER_PUT], [
	AC_KERNEL_TRY_COMPILE([
		#include <linux/mmu_notifier.h>
	],[
		mmu_notifier_put(NULL);
	],[
		AC_DEFINE(HAVE_MMU_NOTIFIER_PUT, 1,
			[mmu_notifier_put() is available])
	])
])

AC_DEFUN([AC_AMDGPU_MMU_NOTIFIER_SYNCHRONIZE], [
	AC_KERNEL_DO_BACKGROUND([
		AC_KERNEL_TRY_COMPILE([
			#include <linux/mmu_notifier.h>
		],[
			mmu_notifier_synchronize();
		],[
			AC_DEFINE(HAVE_MMU_NOTIFIER_SYNCHRONIZE, 1,
			[mmu_notifier_synchronize() is available])
		])
		AC_AMDGPU_MMU_NOTIFIER_PUT
	])
])