From 6bee1d685b55c4568a4437586d0f15f762de1ec4 Mon Sep 17 00:00:00 2001
From: Rich Ercolani <rincebrain@gmail.com>
Date: Fri, 14 Jan 2022 05:09:08 -0500
Subject: [PATCH] Linux 5.16 compat: Check slab.h for kvmalloc

As it says on the tin - the folio work moved a bunch out of mm.h.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Coleman Kane <ckane@colemankane.org>
Signed-off-by: Rich Ercolani <rincebrain@gmail.com>
Closes #12975
(cherry picked from commit e86f88aa0b4f4e2784980d6d5c04f397e4839493)
Signed-off-by: Jonathon Fernyhough <jonathon@m2x.dev>
---
 config/kernel-kmem.m4 | 1 +
 1 file changed, 1 insertion(+)

diff --git a/config/kernel-kmem.m4 b/config/kernel-kmem.m4
index 43f9e72f88d8..03c2a41fbdb2 100644
--- a/config/kernel-kmem.m4
+++ b/config/kernel-kmem.m4
@@ -64,6 +64,7 @@ dnl #
 AC_DEFUN([ZFS_AC_KERNEL_SRC_KVMALLOC], [
 	ZFS_LINUX_TEST_SRC([kvmalloc], [
 		#include <linux/mm.h>
+		#include <linux/slab.h>
 	],[
 		void *p __attribute__ ((unused));