driver core: memory: semaphore to mutex

Signed-off-by: Daniel Walker <dwalker@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 7ae413fdd5fc..1f3801a8184d 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -20,6 +20,7 @@
 #include <linux/kobject.h>
 #include <linux/memory_hotplug.h>
 #include <linux/mm.h>
+#include <linux/mutex.h>
 #include <asm/atomic.h>
 #include <asm/uaccess.h>
 
@@ -205,7 +206,7 @@ static int memory_block_change_state(struct memory_block *mem,
                 unsigned long to_state, unsigned long from_state_req)
 {
         int ret = 0;
-        down(&mem->state_sem);
+        mutex_lock(&mem->state_mutex);
 
         if (mem->state != from_state_req) {
                 ret = -EINVAL;
@@ -217,7 +218,7 @@ static int memory_block_change_state(struct memory_block *mem,
                 mem->state = to_state;
 
 out:
-        up(&mem->state_sem);
+        mutex_unlock(&mem->state_mutex);
         return ret;
 }
 
@@ -341,7 +342,7 @@ static int add_memory_block(unsigned long node_id, struct mem_section *section,
 
         mem->phys_index = __section_nr(section);
         mem->state = state;
-        init_MUTEX(&mem->state_sem);
+        mutex_init(&mem->state_mutex);
         mem->phys_device = phys_device;
 
         ret = register_memory(mem, section, NULL);