linux-kernel - Re: [PATCH 1/6] x86/mce/AMD: Increase size of bank

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Date:	Fri, 8 Jul 2016 11:21:35 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Borislav Petkov <bp@...en8.de>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Aravind Gopalakrishnan <Aravind.Gopalakrishnan@....com>,
	Yazen Ghannam <Yazen.Ghannam@....com>
Subject: Re: [PATCH 1/6] x86/mce/AMD: Increase size of bank_map type


* Borislav Petkov <bp@...en8.de> wrote:

> From: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@....com>
> 
> Change bank_map type from char to int since we now have more than eight
> banks in a system.
> 
> Signed-off-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@....com>
> Cc: Aravind Gopalakrishnan <aravindksg.lkml@...il.com>
> Cc: Tony Luck <tony.luck@...el.com>
> Cc: linux-edac <linux-edac@...r.kernel.org>
> Link: http://lkml.kernel.org/r/1466462163-29008-1-git-send-email-Yazen.Ghannam@amd.com
> Signed-off-by: Yazen Ghannam <Yazen.Ghannam@....com>
> Signed-off-by: Borislav Petkov <bp@...e.de>
> ---
>  arch/x86/kernel/cpu/mcheck/mce_amd.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd.c b/arch/x86/kernel/cpu/mcheck/mce_amd.c
> index 10b0661651e0..7b7f3be783d4 100644
> --- a/arch/x86/kernel/cpu/mcheck/mce_amd.c
> +++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c
> @@ -93,7 +93,7 @@ const char * const amd_df_mcablock_names[] = {
>  EXPORT_SYMBOL_GPL(amd_df_mcablock_names);
>  
>  static DEFINE_PER_CPU(struct threshold_bank **, threshold_banks);
> -static DEFINE_PER_CPU(unsigned char, bank_map);	/* see which banks are on */
> +static DEFINE_PER_CPU(unsigned int, bank_map);	/* see which banks are on */

Btw., is there any check somewhere which printed a helpful warning when we 
exceeded the 8 banks limit - and which would prints a helpful warning if we ever 
exceed the 32 banks limit?

Thanks,

	Ingo