diff options
| author | Ingo Molnar <mingo@elte.hu> | 2006-06-26 09:24:32 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-26 18:58:16 +0200 |
| commit | 81615b624a45621b758380ec45d750483eae281d (patch) | |
| tree | 9373ca3e4a484fe4fdac48ae6e6d204c7e560121 /kernel/cpu.c | |
| parent | [PATCH] work around ppc64 bootup bug by making mutex-debugging save/restore irqs (diff) | |
| download | linux-81615b624a45621b758380ec45d750483eae281d.tar.xz linux-81615b624a45621b758380ec45d750483eae281d.zip | |
[PATCH] Convert kernel/cpu.c to mutexes
Convert kernel/cpu.c from semaphore to mutex.
I've reviewed all lock_cpu_hotplug() critical sections, and they all seem to
fit mutex semantics.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/cpu.c')
| -rw-r--r-- | kernel/cpu.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/kernel/cpu.c b/kernel/cpu.c index fe2b8d0bfe4c..03dcd981846a 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -13,10 +13,10 @@ #include <linux/module.h> #include <linux/kthread.h> #include <linux/stop_machine.h> -#include <asm/semaphore.h> +#include <linux/mutex.h> /* This protects CPUs going up and down... */ -static DECLARE_MUTEX(cpucontrol); +static DEFINE_MUTEX(cpucontrol); static BLOCKING_NOTIFIER_HEAD(cpu_chain); @@ -30,9 +30,9 @@ static int __lock_cpu_hotplug(int interruptible) if (lock_cpu_hotplug_owner != current) { if (interruptible) - ret = down_interruptible(&cpucontrol); + ret = mutex_lock_interruptible(&cpucontrol); else - down(&cpucontrol); + mutex_lock(&cpucontrol); } /* @@ -56,7 +56,7 @@ void unlock_cpu_hotplug(void) { if (--lock_cpu_hotplug_depth == 0) { lock_cpu_hotplug_owner = NULL; - up(&cpucontrol); + mutex_unlock(&cpucontrol); } } EXPORT_SYMBOL_GPL(unlock_cpu_hotplug); |