Remove kthread_bind() call from _cpu_down()

We are anyway kthread_stop()ping other per-cpu kernel threads after
move_task_off_dead_cpu(), so we can do it with the stop_machine_run thread
as well.

I just checked with Vatsa if there was any subtle reason why they
had put in the kthread_bind() in cpu.c. Vatsa cannot seem to recollect
any and I can't see any. So let us just remove the kthread_bind.

Signed-off-by: Gautham R Shenoy <ego@in.ibm.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/kernel/cpu.c b/kernel/cpu.c
index 1a823944e972ae51fc3b05e100c83992ab57d315..28cb6c71a47a141b46d24fb7bf9a82f50522e5cb 100644 (file)
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -175,10 +175,6 @@ static int _cpu_down(unsigned int cpu)
        /* This actually kills the CPU. */
        __cpu_die(cpu);
 
-       /* Move it here so it can run. */
-       kthread_bind(p, get_cpu());
-       put_cpu();
-
        /* CPU is completely dead: tell everyone.  Too late to complain. */
        if (raw_notifier_call_chain(&cpu_chain, CPU_DEAD, hcpu) == NOTIFY_BAD)
                BUG();