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authorRichard Weinberger <richard@nod.at>2016-08-18 14:57:17 +0200
committerThomas Gleixner <tglx@linutronix.de>2016-09-06 18:30:20 +0200
commite6d4989a9ad1ccc343f29578a461612ed80fc6c5 (patch)
tree97b092d2f0505c61d15cf4f2025fddb0c5f6c614 /kernel/cpu.c
parent017c59c042d01fc84cae7a8ea475861e702c77ab (diff)
downloadop-kernel-dev-e6d4989a9ad1ccc343f29578a461612ed80fc6c5.zip
op-kernel-dev-e6d4989a9ad1ccc343f29578a461612ed80fc6c5.tar.gz
relayfs: Convert to hotplug state machine
Install the callbacks via the state machine. They are installed at run time but relay_prepare_cpu() does not need to be invoked by the boot CPU because relay_open() was not yet invoked and there are no pools that need to be created. Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: rt@linutronix.de Cc: Andrew Morton <akpm@linux-foundation.org> Link: http://lkml.kernel.org/r/20160818125731.27256-3-bigeasy@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/cpu.c')
-rw-r--r--kernel/cpu.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/cpu.c b/kernel/cpu.c
index d14ae44..0c0d4b2 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -23,6 +23,7 @@
#include <linux/tick.h>
#include <linux/irq.h>
#include <linux/smpboot.h>
+#include <linux/relay.h>
#include <trace/events/power.h>
#define CREATE_TRACE_POINTS
@@ -1272,6 +1273,11 @@ static struct cpuhp_step cpuhp_bp_states[] = {
.startup.single = smpcfd_prepare_cpu,
.teardown.single = smpcfd_dead_cpu,
},
+ [CPUHP_RELAY_PREPARE] = {
+ .name = "relay:prepare",
+ .startup.single = relay_prepare_cpu,
+ .teardown.single = NULL,
+ },
[CPUHP_RCUTREE_PREP] = {
.name = "RCU/tree:prepare",
.startup.single = rcutree_prepare_cpu,
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