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Date: Thu, 11 Oct 2012 07:53:04 +0900 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, alan@...rguk.ukuu.org.uk, Shawn Guo <shawn.guo@...aro.org>, Andrew Morton <akpm@...ux-foundation.org>, Linus Torvalds <torvalds@...ux-foundation.org> Subject: [ 018/122] kernel/sys.c: call disable_nonboot_cpus() in kernel_restart() 3.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Shawn Guo <shawn.guo@...aro.org> commit f96972f2dc6365421cf2366ebd61ee4cf060c8d5 upstream. As kernel_power_off() calls disable_nonboot_cpus(), we may also want to have kernel_restart() call disable_nonboot_cpus(). Doing so can help machines that require boot cpu be the last alive cpu during reboot to survive with kernel restart. This fixes one reboot issue seen on imx6q (Cortex-A9 Quad). The machine requires that the restart routine be run on the primary cpu rather than secondary ones. Otherwise, the secondary core running the restart routine will fail to come to online after reboot. Signed-off-by: Shawn Guo <shawn.guo@...aro.org> Signed-off-by: Andrew Morton <akpm@...ux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- kernel/sys.c | 1 + 1 file changed, 1 insertion(+) --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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