From: Tim Chase <tim@chase2k.com>
Date: Mon, 1 Aug 2016 13:19:19 +0000 (-0500)
Subject: Fix HAVE_MUTEX_OWNER test for kernels prior to 4.6
X-Git-Tag: zfs-0.8.0-rc1~152^2~85
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=576865be20ce4a0d4365cd62a589edec070fe08c;p=zfs

Fix HAVE_MUTEX_OWNER test for kernels prior to 4.6

Recent 4.X kernels prior to 4.6 require #include of spinlock.h in
order to get the definition of __ARCH_SPIN_LOCK_UNLOCKED which is
used by DEFINE_MUTEX().

Signed-off-by: Tim Chase <tim@chase2k.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #566
---

diff --git a/config/spl-build.m4 b/config/spl-build.m4
index 3ed0e8fd0..94e692a8b 100644
--- a/config/spl-build.m4
+++ b/config/spl-build.m4
@@ -1537,6 +1537,7 @@ AC_DEFUN([SPL_AC_MUTEX_OWNER], [
 	EXTRA_KCFLAGS="-Werror"
 	SPL_LINUX_TRY_COMPILE([
 		#include <linux/mutex.h>
+		#include <linux/spinlock.h>
 	],[
 		DEFINE_MUTEX(m);
 		struct task_struct *t __attribute__ ((unused));