linux-kernel - Re: [PATCH v3 0/2] Consolidate redundant register/stack access code

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Message-ID: <56BA5226.3090105@linaro.org>
Date:	Tue, 9 Feb 2016 15:55:02 -0500
From:	David Long <dave.long@...aro.org>
To:	Ingo Molnar <mingo@...nel.org>,
	Michael Ellerman <mpe@...erman.id.au>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	"chengang@...ndsoft.com.cn" <chengang@...ndsoft.com.cn>,
	Andy Lutomirski <luto@...nel.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Borislav Petkov <bp@...e.de>, Brian Gerst <brgerst@...il.com>,
	David Hildenbrand <dahi@...ux.vnet.ibm.com>,
	Denys Vlasenko <dvlasenk@...hat.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Hendrik Brueckner <brueckner@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...hat.com>,
	Jan Beulich <JBeulich@...e.com>,
	Kees Cook <keescook@...omium.org>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Paul Mackerras <paulus@...ba.org>,
	Rashmica Gupta <rashmicy@...il.com>,
	Rich Felker <dalias@...c.org>,
	Richard Kuo <rkuo@...eaurora.org>,
	Roland McGrath <roland@...k.frob.com>,
	Russell King <linux@....linux.org.uk>,
	Thomas Gleixner <tglx@...utronix.de>,
	Will Deacon <will.deacon@....com>,
	Yoshinori Sato <ysato@...rs.sourceforge.jp>,
	linux-arm-kernel@...ts.infradead.org,
	linux-hexagon@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-s390@...r.kernel.org, linux-sh@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org, x86@...nel.org
Subject: Re: [PATCH v3 0/2] Consolidate redundant register/stack access code

On 02/09/2016 04:45 AM, Ingo Molnar wrote:
>
> * Michael Ellerman <mpe@...erman.id.au> wrote:
>
>> On Tue, 2016-02-09 at 00:38 -0500, David Long wrote:
>>
>>> From: "David A. Long" <dave.long@...aro.org>
>>>
>>> Move duplicate and functionally equivalent code for accessing registers
>>> and stack (CONFIG_HAVE_REGS_AND_STACK_ACCESS_API) from arch subdirs into
>>> common kernel files.
>>>
>>> I'm sending this out again (with updated distribution list) because v2
>>> just never got pulled in, even though I don't think there were any
>>> outstanding issues.
>>
>> A big cross arch patch like this would often get taken by Andrew Morton, but
>> AFAICS you didn't CC him - so I just added him, perhaps he'll pick it up for
>> us :D
>
> The other problem is that the second patch is commingling changes to 6 separate
> architectures:
>
>   16 files changed, 106 insertions(+), 343 deletions(-)
>
> that should probably be 6 separate patches. Easier to review, easier to bisect to,
> easier to revert, etc.
>
> Thanks,
>
> 	Ingo
>

I see your point but I'm not sure it could have been broken into 
separate successive patches that would each build for all architectures.

-dl