[PATCH] powerpc: Set the correct kernel taint on machine check errors.

[Michael Ellerman]

On Mon, 2015-06-15 at 13:25 +1000, Daniel Axtens wrote:
> This means the 'M' flag will work properly when the kernel prints a backtrace.
> 
> Signed-off-by: Daniel Axtens <dja at axtens.net>
> ---
>  arch/powerpc/kernel/traps.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
> index 6530f1b..37de90f 100644
> --- a/arch/powerpc/kernel/traps.c
> +++ b/arch/powerpc/kernel/traps.c
> @@ -297,6 +297,8 @@ long machine_check_early(struct pt_regs *regs)
>  
>  	__this_cpu_inc(irq_stat.mce_exceptions);
>  
> +	add_taint(TAINT_MACHINE_CHECK, LOCKDEP_NOW_UNRELIABLE);

I'm not sure about the lockdep bit.

I guess it's safer to just declare it fubar.

Does this fix a bug, or just nice to have?

cheers