From mboxrd@z Thu Jan 1 00:00:00 1970 From: akpm@linux-foundation.org (Andrew Morton) Date: Tue, 4 Sep 2012 15:36:24 -0700 Subject: [PATCH] kernel/sys.c: call disable_nonboot_cpus in kernel_restart In-Reply-To: <1346682298-13958-1-git-send-email-shawn.guo@linaro.org> References: <1346682298-13958-1-git-send-email-shawn.guo@linaro.org> Message-ID: <20120904153624.d4aaed4e.akpm@linux-foundation.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Mon, 3 Sep 2012 22:24:58 +0800 Shawn Guo wrote: > Like kernel_power_off calls disable_nonboot_cpus, we may want to have > kernel_restart call disable_nonboot_cpus as well. Doing so can help > the machines that require boot cpu be the last alive cpu during reboot > to survive with kernel restart. That does sound logical. But the changelog is very vague and fluffy. Does this patch actually fix any known problem on any known machine? > ... > --- a/kernel/sys.c > +++ b/kernel/sys.c > @@ -368,6 +368,7 @@ EXPORT_SYMBOL(unregister_reboot_notifier); > void kernel_restart(char *cmd) > { > kernel_restart_prepare(cmd); > + disable_nonboot_cpus(); > if (!cmd) > printk(KERN_EMERG "Restarting system.\n"); > else