kernel/locking: Fix compile error with qrwlock.c

Saw these compile errors on SPARC when queued rwlock feature is enabled.

 CC      kernel/locking/qrwlock.o
kernel/locking/qrwlock.c: In function 'queued_read_lock_slowpath':
kernel/locking/qrwlock.c:89: error: implicit declaration of function 'arch_spin_lock'
kernel/locking/qrwlock.c:102: error: implicit declaration of function 'arch_spin_unlock'
make[4]: *** [kernel/locking/qrwlock.o] Error 1

Include spinlock.h in qrwlock.c to fix it.

Signed-off-by: Babu Moger <babu.moger@oracle.com>
Reviewed-by: HÃ¥kon Bugge <haakon.bugge@oracle.com>
Reviewed-by: Jane Chu <jane.chu@oracle.com>
Reviewed-by: Shannon Nelson <shannon.nelson@oracle.com>
Reviewed-by: Vijay Kumar <vijay.ac.kumar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 9ab6055f959032258c0f83a070cd0d26ed7a8fc5)

Signed-off-by: Babu Moger <babu.moger@oracle.com>
Orabug: 26183741
Signed-off-by: Allen Pais <allen.pais@oracle.com>

diff --git a/kernel/locking/qrwlock.c b/kernel/locking/qrwlock.c
index 6a7a3b8d5ac9e669b789c6be4542a799542ea40e..ddf799918520db765b0d06cde9ac115532946d5f 100644 (file)
--- a/kernel/locking/qrwlock.c
+++ b/kernel/locking/qrwlock.c
@@ -20,6 +20,7 @@
 #include <linux/cpumask.h>
 #include <linux/percpu.h>
 #include <linux/hardirq.h>
+#include <linux/spinlock.h>
 #include <asm/qrwlock.h>
 
 /*