From d0a9d75b9cd9cc8097c746611cc57cc8438b94be Mon Sep 17 00:00:00 2001 From: Russell King Date: Sun, 22 Apr 2007 10:08:58 +0100 Subject: [ARM] sa1100: use mutexes rather than semaphores Use a mutex in the sa1100 clock support rather than a semaphore. Remove the unused "module" field. Signed-off-by: Russell King --- arch/arm/mach-sa1100/clock.c | 24 +++++++++++++----------- 1 file changed, 13 insertions(+), 11 deletions(-) (limited to 'arch') diff --git a/arch/arm/mach-sa1100/clock.c b/arch/arm/mach-sa1100/clock.c index b1e8fd766c1..fc97fe57ee6 100644 --- a/arch/arm/mach-sa1100/clock.c +++ b/arch/arm/mach-sa1100/clock.c @@ -9,14 +9,17 @@ #include #include #include +#include #include -#include +/* + * Very simple clock implementation - we only have one clock to + * deal with at the moment, so we only match using the "name". + */ struct clk { struct list_head node; unsigned long rate; - struct module *owner; const char *name; unsigned int enabled; void (*enable)(void); @@ -24,21 +27,21 @@ 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)) { + if (strcmp(id, p->name) == 0) { clk = p; break; } } - up(&clocks_sem); + mutex_unlock(&clocks_mutex); return clk; } @@ -46,7 +49,6 @@ EXPORT_SYMBOL(clk_get); void clk_put(struct clk *clk) { - module_put(clk->owner); } EXPORT_SYMBOL(clk_put); @@ -109,18 +111,18 @@ 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); -- cgit v1.2.3-70-g09d2