[RFC,04/17] powerpc: Allow multiple machine-check handlers

Certain processor types are co-supportable, and their machine-check
handlers will be referenced if the entries in cputable.c are actually
generated, so allow more than one machine-check handler to be built in.

This fixes a bug where configuring FreeScale E5500 support (P5020DS)
into the kernel would break machine-check handling on PPC64 A2 systems
by using a bogus machine_check_generic() handler that does nothing.

Signed-off-by: Kyle Moffett <Kyle.D.Moffett@boeing.com>
---
 arch/powerpc/kernel/traps.c |   18 ++++++++----------
 1 files changed, 8 insertions(+), 10 deletions(-)

On Nov 9, 2011, at 6:07 PM, Kyle Moffett wrote:

> Certain processor types are co-supportable, and their machine-check
> handlers will be referenced if the entries in cputable.c are actually
> generated, so allow more than one machine-check handler to be built in.
> 
> This fixes a bug where configuring FreeScale E5500 support (P5020DS)
> into the kernel would break machine-check handling on PPC64 A2 systems
> by using a bogus machine_check_generic() handler that does nothing.
> 
> Signed-off-by: Kyle Moffett <Kyle.D.Moffett@boeing.com>
> ---
> arch/powerpc/kernel/traps.c |   18 ++++++++----------
> 1 files changed, 8 insertions(+), 10 deletions(-)
> 
> diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
> index 4e59082..e3113341 100644
> --- a/arch/powerpc/kernel/traps.c
> +++ b/arch/powerpc/kernel/traps.c
> @@ -418,7 +418,8 @@ int machine_check_47x(struct pt_regs *regs)
> 
> 	return 0;
> }
> -#elif defined(CONFIG_E500)
> +#endif
> +#if defined(CONFIG_FSL_E500MC) || defined(CONFIG_FSL_E5500)
> int machine_check_e500mc(struct pt_regs *regs)
> {
> 	unsigned long mcsr = mfspr(SPRN_MCSR);
> @@ -517,7 +518,8 @@ silent_out:
> 	mtspr(SPRN_MCSR, mcsr);
> 	return mfspr(SPRN_MCSR) == 0 && recoverable;
> }
> -
> +#endif
> +#ifdef CONFIG_FSL_E500_V1_V2

doesn't exist yet, so patch is wrong sequence order.

> int machine_check_e500(struct pt_regs *regs)
> {
> 	unsigned long reason = get_mc_reason(regs);
> @@ -557,12 +559,8 @@ int machine_check_e500(struct pt_regs *regs)
> 
> 	return 0;
> }
> -
> -int machine_check_generic(struct pt_regs *regs)
> -{
> -	return 0;
> -}
> -#elif defined(CONFIG_E200)
> +#endif
> +#ifdef CONFIG_E200
> int machine_check_e200(struct pt_regs *regs)
> {
> 	unsigned long reason = get_mc_reason(regs);
> @@ -587,7 +585,8 @@ int machine_check_e200(struct pt_regs *regs)
> 
> 	return 0;
> }
> -#else
> +#endif
> +
> int machine_check_generic(struct pt_regs *regs)
> {
> 	unsigned long reason = get_mc_reason(regs);
> @@ -623,7 +622,6 @@ int machine_check_generic(struct pt_regs *regs)
> 	}
> 	return 0;
> }
> -#endif /* everything else */
> 
> void machine_check_exception(struct pt_regs *regs)
> {
> -- 
> 1.7.2.5

On Nov 10, 2011, at 08:37, Kumar Gala wrote:
> On Nov 9, 2011, at 6:07 PM, Kyle Moffett wrote:
>> 
>> +#if defined(CONFIG_FSL_E500MC) || defined(CONFIG_FSL_E5500)
>> +#ifdef CONFIG_FSL_E500_V1_V2
> 
> doesn't exist yet, so patch is wrong sequence order.

Oops, d'oh.

You are completely correct, thanks for noticing!

I'll fix this for my next submission.

Cheers,
Kyle Moffett