driver core: memory: semaphore to mutex
Daniel Walker [Tue, 5 Feb 2008 07:35:47 +0000 (23:35 -0800)]
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>

drivers/base/memory.c
include/linux/memory.h
mm/memory_hotplug.c

index 7ae413f..1f3801a 100644 (file)
@@ -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);
index 33f0ff0..f80e0e3 100644 (file)
@@ -18,8 +18,7 @@
 #include <linux/sysdev.h>
 #include <linux/node.h>
 #include <linux/compiler.h>
-
-#include <asm/semaphore.h>
+#include <linux/mutex.h>
 
 struct memory_block {
        unsigned long phys_index;
@@ -30,7 +29,7 @@ struct memory_block {
         * created long after the critical areas during
         * initialization.
         */
-       struct semaphore state_sem;
+       struct mutex state_mutex;
        int phys_device;                /* to which fru does this belong? */
        void *hw;                       /* optional pointer to fw/hw data */
        int (*phys_callback)(struct memory_block *);
index 7469c50..0fb3302 100644 (file)
@@ -208,7 +208,7 @@ int online_pages(unsigned long pfn, unsigned long nr_pages)
        /*
         * This doesn't need a lock to do pfn_to_page().
         * The section can't be removed here because of the
-        * memory_block->state_sem.
+        * memory_block->state_mutex.
         */
        zone = page_zone(pfn_to_page(pfn));
        pgdat_resize_lock(zone->zone_pgdat, &flags);