smp/hotplug: Move step CPUHP_AP_SMPCFD_DYING to the correct place

commit 46febd37f9c758b05cd25feae8512f22584742fe upstream.

Commit 31487f8328f2 ("smp/cfd: Convert core to hotplug state machine")
accidently put this step on the wrong place. The step should be at the
cpuhp_ap_states[] rather than the cpuhp_bp_states[].

grep smpcfd /sys/devices/system/cpu/hotplug/states
 40: smpcfd:prepare
129: smpcfd:dying

"smpcfd:dying" was missing before.
So was the invocation of the function smpcfd_dying_cpu().

Fixes: 31487f8328f2 ("smp/cfd: Convert core to hotplug state machine")
Signed-off-by: Lai Jiangshan <jiangshanlai@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Richard Weinberger <richard@nod.at>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lkml.kernel.org/r/20171128131954.81229-1-jiangshanlai@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/kernel/cpu.c b/kernel/cpu.c
index 04892a82f6ac36c92324806b66a1c1855880c8f7..7891aecc6aec7902835cbdd80d98960bb02b4888 100644 (file)
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -1289,11 +1289,6 @@ static struct cpuhp_step cpuhp_bp_states[] = {
                .teardown.single        = NULL,
                .cant_stop              = true,
        },
-       [CPUHP_AP_SMPCFD_DYING] = {
-               .name                   = "smpcfd:dying",
-               .startup.single         = NULL,
-               .teardown.single        = smpcfd_dying_cpu,
-       },
        /*
         * Handled on controll processor until the plugged processor manages
         * this itself.
@@ -1335,6 +1330,11 @@ static struct cpuhp_step cpuhp_ap_states[] = {
                .startup.single         = NULL,
                .teardown.single        = rcutree_dying_cpu,
        },
+       [CPUHP_AP_SMPCFD_DYING] = {
+               .name                   = "smpcfd:dying",
+               .startup.single         = NULL,
+               .teardown.single        = smpcfd_dying_cpu,
+       },
        /* Entry state on starting. Interrupts enabled from here on. Transient
         * state for synchronsization */
        [CPUHP_AP_ONLINE] = {