linux-kernel - Re: [GIT] Sparc

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Message-Id: <20100817.191424.183031381.davem@davemloft.net>
Date:	Tue, 17 Aug 2010 19:14:24 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	torvalds@...ux-foundation.org
Cc:	akpm@...ux-foundation.org, sparclinux@...r.kernel.org,
	linux-kernel@...r.kernel.org, paulus@...ibm.com,
	benh@...nel.crashing.org
Subject: Re: [GIT] Sparc

From: Linus Torvalds <torvalds@...ux-foundation.org>
Date: Tue, 17 Aug 2010 18:59:17 -0700

> In commit 86fa04b8742ac681d470786f55e2403ada0075b2 you fix the return
> type, but you still have the wrong _argument_ type:
> 
>   extern void atomic64_add(int, atomic64_t *);
>   extern void atomic64_sub(int, atomic64_t *);
>   extern long atomic64_add_ret(int, atomic64_t *);
>   extern long atomic64_sub_ret(int, atomic64_t *);

Thanks, I'll fix that up.

> I merged your pull request, but you've got some fixing up to do,
> methinks. I also really think you need to make your rwsem's use 64-bit
> values on sparc64, because otherwise you can overflow the mmap_sem by
> having more than 65536 threads doing page-faults (on 32-bit, having
> more than 2**16 threads in one process is unlikely to work for other
> reasons, like just pure stack usage, so we don't really care about the
> 32-bit case)

I have a patch to do this already, just need to test it.

You should bug the powerpc folks too :-)
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