linux-kernel - [RFC PATCH v1 32/70] kernel, smp:

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Date:	Tue, 22 Jul 2014 21:59:08 -0400
From:	"Chen, Gong" <gong.chen@...ux.intel.com>
To:	linux-kernel@...r.kernel.org
Cc:	mingo@...nel.org, tglx@...utronix.de, paulus@...ba.org,
	benh@...nel.crashing.org, tony.luck@...el.com, hpa@...or.com,
	jkosina@...e.cz, rafael.j.wysocki@...el.com, bp@...en8.de,
	linux@....linux.org.uk, ralf@...ux-mips.org,
	schwidefsky@...ibm.com, davem@...emloft.net,
	viro@...iv.linux.org.uk, fweisbec@...il.com, cl@...ux.com,
	akpm@...ux-foundation.org, axboe@...nel.dk,
	JBottomley@...allels.com, neilb@...e.de,
	christoffer.dall@...aro.org, rostedt@...dmis.org, rric@...nel.org,
	gregkh@...uxfoundation.org, mhocko@...e.cz, david@...morbit.com,
	"Chen, Gong" <gong.chen@...ux.intel.com>
Subject: [RFC PATCH v1 32/70] kernel, smp: _FROZEN Cleanup

Remove XXX_FROZEN state from kernel/smp.

Signed-off-by: Chen, Gong <gong.chen@...ux.intel.com>
---
 kernel/smp.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/kernel/smp.c b/kernel/smp.c
index 80c33f8..808ec06 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -37,9 +37,8 @@ hotplug_cfd(struct notifier_block *nfb, unsigned long action, void *hcpu)
 	long cpu = (long)hcpu;
 	struct call_function_data *cfd = &per_cpu(cfd_data, cpu);
 
-	switch (action) {
+	switch (action & ~CPU_TASKS_FROZEN) {
 	case CPU_UP_PREPARE:
-	case CPU_UP_PREPARE_FROZEN:
 		if (!zalloc_cpumask_var_node(&cfd->cpumask, GFP_KERNEL,
 				cpu_to_node(cpu)))
 			return notifier_from_errno(-ENOMEM);
@@ -52,17 +51,12 @@ hotplug_cfd(struct notifier_block *nfb, unsigned long action, void *hcpu)
 
 #ifdef CONFIG_HOTPLUG_CPU
 	case CPU_UP_CANCELED:
-	case CPU_UP_CANCELED_FROZEN:
-		/* Fall-through to the CPU_DEAD[_FROZEN] case. */
-
 	case CPU_DEAD:
-	case CPU_DEAD_FROZEN:
 		free_cpumask_var(cfd->cpumask);
 		free_percpu(cfd->csd);
 		break;
 
 	case CPU_DYING:
-	case CPU_DYING_FROZEN:
 		/*
 		 * The IPIs for the smp-call-function callbacks queued by other
 		 * CPUs might arrive late, either due to hardware latencies or
-- 
2.0.0.rc2

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