snapshot: Push BKL down into ioctl handlers
Push BKL down into ioctl handlers - snapshot device.
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
diff --git a/kernel/power/user.c b/kernel/power/user.c
index f5512cb..658262b 100644
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -23,6 +23,7 @@
#include <linux/console.h>
#include <linux/cpu.h>
#include <linux/freezer.h>
+#include <linux/smp_lock.h>
#include <asm/uaccess.h>
@@ -164,8 +165,8 @@
return res;
}
-static int snapshot_ioctl(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
+static long snapshot_ioctl(struct file *filp, unsigned int cmd,
+ unsigned long arg)
{
int error = 0;
struct snapshot_data *data;
@@ -181,6 +182,8 @@
data = filp->private_data;
+ lock_kernel();
+
switch (cmd) {
case SNAPSHOT_FREEZE:
@@ -389,7 +392,7 @@
error = -ENOTTY;
}
-
+ unlock_kernel();
return error;
}
@@ -399,7 +402,7 @@
.read = snapshot_read,
.write = snapshot_write,
.llseek = no_llseek,
- .ioctl = snapshot_ioctl,
+ .unlocked_ioctl = snapshot_ioctl,
};
static struct miscdevice snapshot_device = {