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-rw-r--r--arch/sparc/kernel/apc.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/sparc/kernel/apc.c b/arch/sparc/kernel/apc.c
index d06a405ca71..6707422c984 100644
--- a/arch/sparc/kernel/apc.c
+++ b/arch/sparc/kernel/apc.c
@@ -10,6 +10,7 @@
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/miscdevice.h>
+#include <linux/smp_lock.h>
#include <linux/pm.h>
#include <asm/io.h>
@@ -75,6 +76,7 @@ static inline void apc_free(void)
static int apc_open(struct inode *inode, struct file *f)
{
+ cycle_kernel_lock();
return 0;
}