[ARM] pxa: use mutexes instead of semaphores

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

#include <asm/hardware.h>

#include <asm/semaphore.h>

struct clk {

	struct list_head	node;

};

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;

}

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);