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path: root/arch/cris/arch-v32/drivers/mach-a3/gpio.c
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Diffstat (limited to 'arch/cris/arch-v32/drivers/mach-a3/gpio.c')
-rw-r--r--arch/cris/arch-v32/drivers/mach-a3/gpio.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/cris/arch-v32/drivers/mach-a3/gpio.c b/arch/cris/arch-v32/drivers/mach-a3/gpio.c
index de107dad9f4..ef98608e506 100644
--- a/arch/cris/arch-v32/drivers/mach-a3/gpio.c
+++ b/arch/cris/arch-v32/drivers/mach-a3/gpio.c
@@ -23,6 +23,7 @@
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
+#include <linux/smp_lock.h>
#include <asm/etraxgpio.h>
#include <hwregs/reg_map.h>
@@ -390,6 +391,8 @@ static int gpio_open(struct inode *inode, struct file *filp)
if (!priv)
return -ENOMEM;
+
+ lock_kernel();
memset(priv, 0, sizeof(*priv));
priv->minor = p;
@@ -412,6 +415,7 @@ static int gpio_open(struct inode *inode, struct file *filp)
spin_unlock_irq(&gpio_lock);
}
+ unlock_kernel();
return 0;
}