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-rw-r--r--drivers/sbus/char/riowatchdog.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/sbus/char/riowatchdog.c b/drivers/sbus/char/riowatchdog.c
index a2fc6b8c133..88c0fc6395e 100644
--- a/drivers/sbus/char/riowatchdog.c
+++ b/drivers/sbus/char/riowatchdog.c
@@ -11,6 +11,7 @@
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/miscdevice.h>
+#include <linux/smp_lock.h>
#include <asm/io.h>
#include <asm/ebus.h>
@@ -116,6 +117,7 @@ static void riowd_starttimer(void)
static int riowd_open(struct inode *inode, struct file *filp)
{
+ cycle_kernel_lock();
nonseekable_open(inode, filp);
return 0;
}