From: Zhao Chenhui <chenhui.zhao@freescale.com>
To: <linuxppc-dev@lists.ozlabs.org>, <scottwood@freescale.com>
Cc: <linux-kernel@vger.kernel.org>, <leoli@freescale.com>
Subject: [PATCH] powerpc/sysfs: disable hotplug for the boot cpu
Date: Tue, 28 May 2013 15:59:44 +0800 [thread overview]
Message-ID: <1369727984-21505-2-git-send-email-chenhui.zhao@freescale.com> (raw)
In-Reply-To: <1369727984-21505-1-git-send-email-chenhui.zhao@freescale.com>
Some features depend on the boot cpu, for instance, hibernate/suspend.
So disable hotplug for the boot cpu.
Signed-off-by: Zhao Chenhui <chenhui.zhao@freescale.com>
---
arch/powerpc/kernel/sysfs.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c
index e68a845..294b1c4e 100644
--- a/arch/powerpc/kernel/sysfs.c
+++ b/arch/powerpc/kernel/sysfs.c
@@ -655,8 +655,10 @@ static int __init topology_init(void)
* CPU. For instance, the boot cpu might never be valid
* for hotplugging.
*/
- if (ppc_md.cpu_die)
+ if (ppc_md.cpu_die && cpu != boot_cpuid)
c->hotpluggable = 1;
+ else
+ c->hotpluggable = 0;
if (cpu_online(cpu) || c->hotpluggable) {
register_cpu(c, cpu);
--
1.7.3
next prev parent reply other threads:[~2013-05-28 8:00 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-28 7:59 [PATCH] powerpc/mpic: fix irq distribution problem when MPIC_SINGLE_DEST_CPU Zhao Chenhui
2013-05-28 7:59 ` Zhao Chenhui [this message]
2013-05-31 21:49 ` [PATCH] powerpc/sysfs: disable hotplug for the boot cpu Benjamin Herrenschmidt
2013-06-03 10:43 ` Zhao Chenhui
2013-06-12 3:25 ` Benjamin Herrenschmidt
2013-06-13 11:25 ` Zhao Chenhui
2013-06-14 22:53 ` Benjamin Herrenschmidt
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