Merge master.kernel.org:/pub/scm/linux/kernel/git/mingo/mutex-2.6

3 files changed, 26 insertions, 6 deletions

diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 5b2d18035073..704c3c07f0ab 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -741,7 +741,7 @@ static loff_t memory_lseek(struct file * file, loff_t offset, int orig)
 {
         loff_t ret;
 
-        down(&file->f_dentry->d_inode->i_sem);
+        mutex_lock(&file->f_dentry->d_inode->i_mutex);
         switch (orig) {
                 case 0:
                         file->f_pos = offset;
@@ -756,7 +756,7 @@ static loff_t memory_lseek(struct file * file, loff_t offset, int orig)
                 default:
                         ret = -EINVAL;
         }
-        up(&file->f_dentry->d_inode->i_sem);
+        mutex_unlock(&file->f_dentry->d_inode->i_mutex);
         return ret;
 }
 
diff --git a/drivers/char/sysrq.c b/drivers/char/sysrq.c
index 145275ebdd7e..5765f672e853 100644
--- a/drivers/char/sysrq.c
+++ b/drivers/char/sysrq.c
@@ -153,6 +153,21 @@ static struct sysrq_key_op sysrq_mountro_op = {
 
 /* END SYNC SYSRQ HANDLERS BLOCK */
 
+#ifdef CONFIG_DEBUG_MUTEXES
+
+static void
+sysrq_handle_showlocks(int key, struct pt_regs *pt_regs, struct tty_struct *tty)
+{
+        mutex_debug_show_all_locks();
+}
+
+static struct sysrq_key_op sysrq_showlocks_op = {
+        .handler        = sysrq_handle_showlocks,
+        .help_msg       = "show-all-locks(D)",
+        .action_msg     = "Show Locks Held",
+};
+
+#endif
 
 /* SHOW SYSRQ HANDLERS BLOCK */
 
@@ -294,7 +309,11 @@ static struct sysrq_key_op *sysrq_key_table[SYSRQ_KEY_TABLE_LENGTH] = {
 #else
 /* c */ NULL,
 #endif
+#ifdef CONFIG_DEBUG_MUTEXES
+/* d */ &sysrq_showlocks_op,
+#else
 /* d */ NULL,
+#endif
 /* e */ &sysrq_term_op,
 /* f */ &sysrq_moom_op,
 /* g */ NULL,
diff --git a/drivers/char/watchdog/cpu5wdt.c b/drivers/char/watchdog/cpu5wdt.c
index e75045fe2641..3e8410b5a65e 100644
--- a/drivers/char/watchdog/cpu5wdt.c
+++ b/drivers/char/watchdog/cpu5wdt.c
@@ -28,6 +28,7 @@
 #include <linux/init.h>
 #include <linux/ioport.h>
 #include <linux/timer.h>
+#include <linux/completion.h>
 #include <linux/jiffies.h>
 #include <asm/io.h>
 #include <asm/uaccess.h>
@@ -57,7 +58,7 @@ static int ticks = 10000;
 /* some device data */
 
 static struct {
-        struct semaphore stop;
+        struct completion stop;
         volatile int running;
         struct timer_list timer;
         volatile int queue;
@@ -85,7 +86,7 @@ static void cpu5wdt_trigger(unsigned long unused)
         }
         else {
                 /* ticks doesn't matter anyway */
-                up(&cpu5wdt_device.stop);
+                complete(&cpu5wdt_device.stop);
         }
 
 }
@@ -239,7 +240,7 @@ static int __devinit cpu5wdt_init(void)
         if ( !val )
                 printk(KERN_INFO PFX "sorry, was my fault\n");
 
-        init_MUTEX_LOCKED(&cpu5wdt_device.stop);
+        init_completion(&cpu5wdt_device.stop);
         cpu5wdt_device.queue = 0;
 
         clear_bit(0, &cpu5wdt_device.inuse);
@@ -269,7 +270,7 @@ static void __devexit cpu5wdt_exit(void)
 {
         if ( cpu5wdt_device.queue ) {
                 cpu5wdt_device.queue = 0;
-                down(&cpu5wdt_device.stop);
+                wait_for_completion(&cpu5wdt_device.stop);
         }
 
         misc_deregister(&cpu5wdt_misc);