linux-kernel - [PATCH v2] arch: s390: kernel: scan all present cpu forcely.

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Date:	Thu, 27 Jun 2013 10:43:02 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	Heiko Carstens <heiko.carstens@...ibm.com>
CC:	Martin Schwidefsky <schwidefsky@...ibm.com>, linux390@...ibm.com,
	cornelia.huck@...ibm.com, mtosatti@...hat.com,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-s390@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linux-Arch <linux-arch@...r.kernel.org>
Subject: [PATCH v2] arch: s390: kernel: scan all present cpu forcely.

The architectures which may support 'hotpluggable', can scan all cpus
during subsys_initcall().  the upper caller will skip the return value.

It also can initialize hotpluggable flag of all cpus in time, no matter
whether any cpus fail or not.

Signed-off-by: Chen Gang <gang.chen@...anux.com>
---
 arch/s390/kernel/smp.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index d386c4e..75a118f 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -1064,8 +1064,9 @@ static int __init s390_smp_init(void)
 #endif
 	for_each_present_cpu(cpu) {
 		rc = smp_add_present_cpu(cpu);
-		if (rc)
-			return rc;
+		if (unlikely(rc))
+			printk(KERN_WARNING "%s: add cpu %d failed (%d)\n",
+			       __func__, cpu, rc);
 	}
 	return 0;
 }
-- 
1.7.7.6
--
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