Commit f4b6a0a4 authored by Russell King's avatar Russell King Committed by Russell King
Browse files

[ARM] pxa: use mutexes instead of semaphores 



Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent f62c3f2c

arch/arm/mach-pxa/clock.c

+7 −8
Original line number Diff line number Diff line
@@ -12,7 +12,6 @@ 


#include <asm/arch/pxa-regs.h>

#include <asm/hardware.h>

#include <asm/semaphore.h>



struct clk {

	struct list_head	node;
@@ -25,21 +24,21 @@ struct clk { 
};



static LIST_HEAD(clocks);

static DECLARE_MUTEX(clocks_sem);

static DEFINE_MUTEX(clocks_mutex);

static DEFINE_SPINLOCK(clocks_lock);



struct clk *clk_get(struct device *dev, const char *id)

{

	struct clk *p, *clk = ERR_PTR(-ENOENT);



	down(&clocks_sem);

	mutex_lock(&clocks_mutex);

	list_for_each_entry(p, &clocks, node) {

		if (strcmp(id, p->name) == 0 && try_module_get(p->owner)) {

			clk = p;

			break;

		}

	}

	up(&clocks_sem);

	mutex_unlock(&clocks_mutex);



	return clk;

}
@@ -101,18 +100,18 @@ static struct clk clk_gpio27 = { 


int clk_register(struct clk *clk)

{

	down(&clocks_sem);

	mutex_lock(&clocks_mutex);

	list_add(&clk->node, &clocks);

	up(&clocks_sem);

	mutex_unlock(&clocks_mutex);

	return 0;

}

EXPORT_SYMBOL(clk_register);



void clk_unregister(struct clk *clk)

{

	down(&clocks_sem);

	mutex_lock(&clocks_mutex);

	list_del(&clk->node);

	up(&clocks_sem);

	mutex_unlock(&clocks_mutex);

}

EXPORT_SYMBOL(clk_unregister);