linux-kernel - Re: [PATCH 3/3, v3] AMD64 EDAC: Cleanup type usage to be consistent

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Message-ID: <20121120150110.GB28594@x1.alien8.de>
Date:	Tue, 20 Nov 2012 16:01:10 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Daniel J Blueman <daniel@...ascale-asia.com>
Cc:	Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	H Peter Anvin <hpa@...or.com>,
	Steffen Persvold <sp@...ascale.com>, x86@...nel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3, v3] AMD64 EDAC: Cleanup type usage to be consistent

On Mon, Nov 19, 2012 at 06:02:48PM +0800, Daniel J Blueman wrote:
> As the Northbridge IDs are at most 16-bits, use the same type
> consistently and cleanup some indexes to use smaller types.
> 
> v2: Drop changes for later cleanups
> v3: Further changes suggested by Boris
> 
> Signed-off-by: Daniel J Blueman <daniel@...ascale-asia.com>
> ---
>  arch/x86/include/asm/amd_nb.h    |    2 +-
>  arch/x86/include/asm/processor.h |    2 +-
>  arch/x86/kernel/cpu/amd.c        |    4 ++--
>  drivers/edac/amd64_edac.c        |   16 ++++++++--------
>  drivers/edac/amd64_edac.h        |    6 +++---
>  5 files changed, 15 insertions(+), 15 deletions(-)
> 
> diff --git a/arch/x86/include/asm/amd_nb.h b/arch/x86/include/asm/amd_nb.h
> index 9f5532a..b0815a0 100644
> --- a/arch/x86/include/asm/amd_nb.h
> +++ b/arch/x86/include/asm/amd_nb.h
> @@ -76,7 +76,7 @@ static inline bool amd_nb_has_feature(unsigned feature)
>  	return ((amd_northbridges.flags & feature) == feature);
>  }
>  
> -static inline struct amd_northbridge *node_to_amd_nb(int node)
> +static inline struct amd_northbridge *node_to_amd_nb(u16 node)
>  {
>  	return (node < amd_northbridges.num) ? &amd_northbridges.nb[node] : NULL;
>  }

You have a hunk in patch 1/3 changing the argument being passed to this
function to u16 but you're changing the actual function right here, in
3/3, which is strange and easy to puzzle a potential reviewer.

As a rule of thumb: always do your changes to the functions and their callsites
in one patch so that they belong together and can be reviewed easily.

Thanks.

-- 
Regards/Gruss,
Boris.
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