[tip:locking/urgent] locking/qspinlock: Explicitly include asm/prefetch.h

[tip-bot for Stafford Horne]

Commit-ID:  5671360f29c68d9079914438f6a0109ef62f82a8
Gitweb:     http://git.kernel.org/tip/5671360f29c68d9079914438f6a0109ef62f82a8
Author:     Stafford Horne <shorne@xxxxxxxxx>
AuthorDate: Sat, 8 Jul 2017 04:56:58 +0900
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Sat, 8 Jul 2017 11:01:11 +0200

locking/qspinlock: Explicitly include asm/prefetch.h

In architectures that use qspinlock, like x86, prefetch is loaded
indirectly via the asm/qspinlock.h include.  On other architectures, like
OpenRISC, which may want to use asm-generic/qspinlock.h the built will
fail without the asm/prefetch.h include.

Fix this by including directly.

Signed-off-by: Stafford Horne <shorne@xxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/20170707195658.23840-1-shorne@xxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 kernel/locking/qspinlock.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c
index b2caec7..fd24153 100644
--- a/kernel/locking/qspinlock.c
+++ b/kernel/locking/qspinlock.c
@@ -28,6 +28,7 @@
 #include <linux/percpu.h>
 #include <linux/hardirq.h>
 #include <linux/mutex.h>
+#include <linux/prefetch.h>
 #include <asm/byteorder.h>
 #include <asm/qspinlock.h>