From: Alan Cox <alan@xxxxxxxxxx>
Push BKL down into ioctl handlers - snapshot device.
Signed-off-by: Alan Cox <alan@xxxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx>
Signed-off-by: Len Brown <len.brown@xxxxxxxxx>
---
kernel/power/user.c | 11 +++++++----
1 files changed, 7 insertions(+), 4 deletions(-)
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 @@ static ssize_t snapshot_write(struct file *filp, const char __user *buf,
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 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp,
data = filp->private_data;
+ lock_kernel();
+
switch (cmd) {
case SNAPSHOT_FREEZE:
@@ -389,7 +392,7 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp,
error = -ENOTTY;
}
-
+ unlock_kernel();
return error;
}
@@ -399,7 +402,7 @@ static const struct file_operations snapshot_fops = {
.read = snapshot_read,
.write = snapshot_write,
.llseek = no_llseek,
- .ioctl = snapshot_ioctl,
+ .unlocked_ioctl = snapshot_ioctl,
};
static struct miscdevice snapshot_device = {
--
1.5.6.1.89.gd544
--
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