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authorGautham R Shenoy <ego@in.ibm.com>2008-01-25 21:08:02 +0100
committerIngo Molnar <mingo@elte.hu>2008-01-25 21:08:02 +0100
commit95402b3829010fe1e208f44e4a158ccade88969a (patch)
tree3b9895b47623b4673e3c11121980e5171af76bbe /kernel/cpu.c
parentcpu-hotplug: replace lock_cpu_hotplug() with get_online_cpus() (diff)
downloadlinux-95402b3829010fe1e208f44e4a158ccade88969a.tar.xz
linux-95402b3829010fe1e208f44e4a158ccade88969a.zip
cpu-hotplug: replace per-subsystem mutexes with get_online_cpus()
This patch converts the known per-subsystem mutexes to get_online_cpus put_online_cpus. It also eliminates the CPU_LOCK_ACQUIRE and CPU_LOCK_RELEASE hotplug notification events. Signed-off-by: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/cpu.c')
-rw-r--r--kernel/cpu.c4
1 files changed, 0 insertions, 4 deletions
diff --git a/kernel/cpu.c b/kernel/cpu.c
index b0c4152995f8..e0d3a4f56ecb 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -218,7 +218,6 @@ static int _cpu_down(unsigned int cpu, int tasks_frozen)
return -EINVAL;
cpu_hotplug_begin();
- raw_notifier_call_chain(&cpu_chain, CPU_LOCK_ACQUIRE, hcpu);
err = __raw_notifier_call_chain(&cpu_chain, CPU_DOWN_PREPARE | mod,
hcpu, -1, &nr_calls);
if (err == NOTIFY_BAD) {
@@ -271,7 +270,6 @@ out_thread:
out_allowed:
set_cpus_allowed(current, old_allowed);
out_release:
- raw_notifier_call_chain(&cpu_chain, CPU_LOCK_RELEASE, hcpu);
cpu_hotplug_done();
return err;
}
@@ -302,7 +300,6 @@ static int __cpuinit _cpu_up(unsigned int cpu, int tasks_frozen)
return -EINVAL;
cpu_hotplug_begin();
- raw_notifier_call_chain(&cpu_chain, CPU_LOCK_ACQUIRE, hcpu);
ret = __raw_notifier_call_chain(&cpu_chain, CPU_UP_PREPARE | mod, hcpu,
-1, &nr_calls);
if (ret == NOTIFY_BAD) {
@@ -326,7 +323,6 @@ out_notify:
if (ret != 0)
__raw_notifier_call_chain(&cpu_chain,
CPU_UP_CANCELED | mod, hcpu, nr_calls, NULL);
- raw_notifier_call_chain(&cpu_chain, CPU_LOCK_RELEASE, hcpu);
cpu_hotplug_done();
return ret;