[GIT pull] smp updates for 3.5

From: Thomas Gleixner
Date: Mon Jun 04 2012 - 11:15:28 EST


Linus,

please pull the latest smp-hotplug-for-linus git tree from:

git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git smp-hotplug-for-linus


Thanks,

tglx

------------------>
Srivatsa S. Bhat (2):
smpboot, idle: Optimize calls to smp_processor_id() in idle_threads_init()
smpboot, idle: Fix comment mismatch over idle_threads_init()


kernel/smpboot.c | 17 +++++++++++------
1 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/kernel/smpboot.c b/kernel/smpboot.c
index e1a797e..98f60c5 100644
--- a/kernel/smpboot.c
+++ b/kernel/smpboot.c
@@ -31,6 +31,12 @@ void __init idle_thread_set_boot_cpu(void)
per_cpu(idle_threads, smp_processor_id()) = current;
}

+/**
+ * idle_init - Initialize the idle thread for a cpu
+ * @cpu: The cpu for which the idle thread should be initialized
+ *
+ * Creates the thread if it does not exist.
+ */
static inline void idle_init(unsigned int cpu)
{
struct task_struct *tsk = per_cpu(idle_threads, cpu);
@@ -45,17 +51,16 @@ static inline void idle_init(unsigned int cpu)
}

/**
- * idle_thread_init - Initialize the idle thread for a cpu
- * @cpu: The cpu for which the idle thread should be initialized
- *
- * Creates the thread if it does not exist.
+ * idle_threads_init - Initialize idle threads for all cpus
*/
void __init idle_threads_init(void)
{
- unsigned int cpu;
+ unsigned int cpu, boot_cpu;
+
+ boot_cpu = smp_processor_id();

for_each_possible_cpu(cpu) {
- if (cpu != smp_processor_id())
+ if (cpu != boot_cpu)
idle_init(cpu);
}
}
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