uml: Pushdown the bkl from harddog_kern ioctl

Pushdown the bkl to harddog_ioctl.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Uml <user-mode-linux-devel@lists.sourceforge.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Kacur <jkacur@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>

1 files changed, 15 insertions, 3 deletions

diff --git a/arch/um/drivers/harddog_kern.c b/arch/um/drivers/harddog_kern.c
index d332503fa1be..cfcac1ff4cf2 100644
--- a/arch/um/drivers/harddog_kern.c
+++ b/arch/um/drivers/harddog_kern.c
@@ -124,8 +124,8 @@ static ssize_t harddog_write(struct file *file, const char __user *data, size_t
         return 0;
 }
 
-static int harddog_ioctl(struct inode *inode, struct file *file,
-                         unsigned int cmd, unsigned long arg)
+static int harddog_ioctl_unlocked(struct file *file,
+                                  unsigned int cmd, unsigned long arg)
 {
         void __user *argp= (void __user *)arg;
         static struct watchdog_info ident = {
@@ -148,10 +148,22 @@ static int harddog_ioctl(struct inode *inode, struct file *file,
         }
 }
 
+static long harddog_ioctl(struct file *file,
+                          unsigned int cmd, unsigned long arg)
+{
+        long ret;
+
+        lock_kernel();
+        ret = harddog_ioctl_unlocked(file, cmd, arg);
+        unlock_kernel();
+
+        return ret;
+}
+
 static const struct file_operations harddog_fops = {
         .owner          = THIS_MODULE,
         .write          = harddog_write,
-        .ioctl          = harddog_ioctl,
+        .unlocked_ioctl = harddog_ioctl,
         .open           = harddog_open,
         .release        = harddog_release,
 };