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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>
This commit is contained in:
Daniel Walker 2008-02-04 23:35:47 -08:00 committed by Greg Kroah-Hartman
parent 610ad5064c
commit da19cbcf71
3 changed files with 7 additions and 7 deletions
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7
drivers/base/memory.c
View 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);

5
include/linux/memory.h
View 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 *);

2
mm/memory_hotplug.c
View 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);