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path: root/drivers/char/hpet.c
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Diffstat (limited to 'drivers/char/hpet.c')
-rw-r--r--drivers/char/hpet.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index c9bf5d44402d..f3981ffe20f0 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -14,6 +14,7 @@
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/kernel.h>
+#include <linux/smp_lock.h>
#include <linux/types.h>
#include <linux/miscdevice.h>
#include <linux/major.h>
@@ -254,6 +255,7 @@ static int hpet_open(struct inode *inode, struct file *file)
if (file->f_mode & FMODE_WRITE)
return -EINVAL;
+ lock_kernel();
spin_lock_irq(&hpet_lock);
for (devp = NULL, hpetp = hpets; hpetp && !devp; hpetp = hpetp->hp_next)
@@ -268,6 +270,7 @@ static int hpet_open(struct inode *inode, struct file *file)
if (!devp) {
spin_unlock_irq(&hpet_lock);
+ unlock_kernel();
return -EBUSY;
}
@@ -275,6 +278,7 @@ static int hpet_open(struct inode *inode, struct file *file)
devp->hd_irqdata = 0;
devp->hd_flags |= HPET_OPEN;
spin_unlock_irq(&hpet_lock);
+ unlock_kernel();
hpet_timer_set_irq(devp);
@@ -682,6 +686,7 @@ static inline int hpet_tpcheck(struct hpet_task *tp)
return -ENXIO;
}
+#if 0
int hpet_unregister(struct hpet_task *tp)
{
struct hpet_dev *devp;
@@ -711,6 +716,7 @@ int hpet_unregister(struct hpet_task *tp)
return 0;
}
+#endif /* 0 */
static ctl_table hpet_table[] = {
{