[Xen-devel] [PATCH 1/8] 2.6.17: proper mutex use

["Jan Beulich" <jbeulich@xxxxxxxxxx>]

Mutexes are supposed to not use the old semaphore technique anymore.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>

Index: head-2007-02-08/drivers/xen/balloon/balloon.c
===================================================================
--- head-2007-02-08.orig/drivers/xen/balloon/balloon.c  2007-02-08 
17:07:13.000000000 +0100
+++ head-2007-02-08/drivers/xen/balloon/balloon.c       2007-02-08 
17:09:47.000000000 +0100
@@ -60,7 +60,7 @@
 static struct proc_dir_entry *balloon_pde;
 #endif
 
-static DECLARE_MUTEX(balloon_mutex);
+static DEFINE_MUTEX(balloon_mutex);
 
 /*
  * Protects atomic reservation decrease/increase against concurrent increases.
@@ -321,7 +321,7 @@ static void balloon_process(void *unused
        int need_sleep = 0;
        long credit;
 
-       down(&balloon_mutex);
+       mutex_lock(&balloon_mutex);
 
        do {
                credit = current_target() - bs.current_pages;
@@ -340,7 +340,7 @@ static void balloon_process(void *unused
        if (current_target() != bs.current_pages)
                mod_timer(&balloon_timer, jiffies + HZ);
 
-       up(&balloon_mutex);
+       mutex_unlock(&balloon_mutex);
 }
 
 /* Resets the Xen limit, sets new target, and kicks off processing. */



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