Re: [PATCH 2/2] MIPS: Fix deferred console messages during CPU hotplug

[Paul Mundt <lethal@linux-sh.org>]

On Sun, May 30, 2010 at 12:35:58AM -0700, Kevin Cernekee wrote:
> diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c
> index 6cdca19..bf8923f 100644
> --- a/arch/mips/kernel/smp.c
> +++ b/arch/mips/kernel/smp.c
> @@ -219,6 +220,10 @@ int __cpuinit __cpu_up(unsigned int cpu)
>  
>       cpu_set(cpu, cpu_online_map);
>  
> +     /* Flush out any buffered log messages from the new CPU */
> +     if (try_acquire_console_sem() == 0)
> +             release_console_sem();
> +
>       return 0;
>  }
>  
Since this is entirely generic why not just have kernel/printk.c register
a hotcpu notifier and handle this in the CPU_ONLINE case?