Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl

[net-next-2.6.git] / drivers / watchdog / cpwd.c

diff --git a/drivers/watchdog/cpwd.c b/drivers/watchdog/cpwd.c
index 566343b3c131fc3f6d3ce17b6bc7bd1e2c724ac4..eca855a55c0d6abf96096e6b41847c93b06675db 100644 (file)
--- a/drivers/watchdog/cpwd.c
+++ b/drivers/watchdog/cpwd.c
@@ -25,7 +25,7 @@
 #include <linux/ioport.h>
 #include <linux/timer.h>
 #include <linux/slab.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
 #include <linux/io.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
@@ -89,6 +89,7 @@ struct cpwd {
        } devs[WD_NUMDEVS];
 };
 
+static DEFINE_MUTEX(cpwd_mutex);
 static struct cpwd *cpwd_device;
 
 /* Sun uses Altera PLD EPF8820ATC144-4
@@ -368,7 +369,7 @@ static int cpwd_open(struct inode *inode, struct file *f)
 {
        struct cpwd *p = cpwd_device;
 
-       lock_kernel();
+       mutex_lock(&cpwd_mutex);
        switch (iminor(inode)) {
        case WD0_MINOR:
        case WD1_MINOR:
@@ -376,7 +377,7 @@ static int cpwd_open(struct inode *inode, struct file *f)
                break;
 
        default:
-               unlock_kernel();
+               mutex_unlock(&cpwd_mutex);
                return -ENODEV;
        }
 
@@ -386,13 +387,13 @@ static int cpwd_open(struct inode *inode, struct file *f)
                                IRQF_SHARED, DRIVER_NAME, p)) {
                        printk(KERN_ERR PFX "Cannot register IRQ %d\n",
                                p->irq);
-                       unlock_kernel();
+                       mutex_unlock(&cpwd_mutex);
                        return -EBUSY;
                }
                p->initialized = true;
        }
 
-       unlock_kernel();
+       mutex_unlock(&cpwd_mutex);
 
        return nonseekable_open(inode, f);
 }
@@ -482,9 +483,9 @@ static long cpwd_compat_ioctl(struct file *file, unsigned int cmd,
        case WIOCSTART:
        case WIOCSTOP:
        case WIOCGSTAT:
-               lock_kernel();
+               mutex_lock(&cpwd_mutex);
                rval = cpwd_ioctl(file, cmd, arg);
-               unlock_kernel();
+               mutex_unlock(&cpwd_mutex);
                break;
 
        /* everything else is handled by the generic compat layer */
@@ -524,6 +525,7 @@ static const struct file_operations cpwd_fops = {
        .write =                cpwd_write,
        .read =                 cpwd_read,
        .release =              cpwd_release,
+       .llseek =               no_llseek,
 };
 
 static int __devinit cpwd_probe(struct platform_device *op,