linux-kernel - Re: [PATCH 1/6] ipc/sem.c: further whitespace cleanups

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Message-ID: <537109EF.4010902@colorfullife.com>
Date:	Mon, 12 May 2014 19:50:39 +0200
From:	Manfred Spraul <manfred@...orfullife.com>
To:	Davidlohr Bueso <davidlohr@...com>
CC:	Davidlohr Bueso <davidlohr.bueso@...com>,
	Michael Kerrisk <mtk.manpages@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>, 1vier1@....de
Subject: Re: [PATCH 1/6] ipc/sem.c: further whitespace cleanups

Hi Davidlohr,

On 05/12/2014 01:34 AM, Davidlohr Bueso wrote:
> On Sat, 2014-05-10 at 12:03 +0200, Manfred Spraul wrote:
>> Somehow <TAB>$ was overlooked in the last round of whitespace
>> cleanups.
>> Do that now, before making further changes.
> No big deal, but this patch could easily be included in the the second
> patch instead on its own. Thanks.
The patch series you see is the third approach to fix the issue:
- do not store anything, call perform_atomic_semop() in count_semncnt()
   Really cool, no impact at all for semop() - but nasty.
   A sleeping operation could fail suddenly due to -ERANGE.

- store semncnt and semzcnt in struct sem:
   Increase in perform_atomic_semop(), decrease in unlink_queue().

- Now: store the pointer to the blocking op.

That's why the series got so fine-grained...

--
     Manfred


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