drivers: Push down BKL into various drivers

These are the last remaining device drivers using
the ->ioctl file operation in the drivers directory
(except from v4l drivers).

[fweisbec: drop i8k pushdown as it has been done from
procfs pushdown branch already]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>

1 files changed, 14 insertions, 3 deletions

diff --git a/drivers/char/generic_nvram.c b/drivers/char/generic_nvram.c
index fda4181b5e67..82b5a88a82d7 100644
--- a/drivers/char/generic_nvram.c
+++ b/drivers/char/generic_nvram.c
@@ -19,6 +19,7 @@
 #include <linux/miscdevice.h>
 #include <linux/fcntl.h>
 #include <linux/init.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 #include <asm/nvram.h>
 #ifdef CONFIG_PPC_PMAC
@@ -84,8 +85,7 @@ static ssize_t write_nvram(struct file *file, const char __user *buf,
         return p - buf;
 }
 
-static int nvram_ioctl(struct inode *inode, struct file *file,
-        unsigned int cmd, unsigned long arg)
+static int nvram_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
         switch(cmd) {
 #ifdef CONFIG_PPC_PMAC
@@ -116,12 +116,23 @@ static int nvram_ioctl(struct inode *inode, struct file *file,
         return 0;
 }
 
+static long nvram_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+        int ret;
+
+        lock_kernel();
+        ret = nvram_ioctl(file, cmd, arg);
+        unlock_kernel();
+
+        return ret;
+}
+
 const struct file_operations nvram_fops = {
         .owner          = THIS_MODULE,
         .llseek         = nvram_llseek,
         .read           = read_nvram,
         .write          = write_nvram,
-        .ioctl          = nvram_ioctl,
+        .unlocked_ioctl = nvram_unlocked_ioctl,
 };
 
 static struct miscdevice nvram_dev = {