linux-kernel - Re: [PATCH] clk: Fix cached parent ptrs allocation

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Message-ID: <4FF5BBD3.6080704@wwwdotorg.org>
Date:	Thu, 05 Jul 2012 10:07:47 -0600
From:	Stephen Warren <swarren@...dotorg.org>
To:	Prashant Gaikwad <pgaikwad@...dia.com>
CC:	mturquette@...com, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] clk: Fix cached parent ptrs allocation

On 07/04/2012 07:15 AM, Prashant Gaikwad wrote:
> Compiler optimizes code someway that even if clk->parents
> is not NULL it tries to allocate parents array. Change the
> condition so that compiler does not optimize it in wrong
> way.

If simply inverting the if test and swapping the if/else blocks solves
some problem, that sounds like a compiler bug that we need to track down
and file/fix.

> Also, initialize i to num_parents to make sure parent
> is searched using parent name if parents is NULL.

Are you sure the change to initialize i wasn't all that was required to
solve the problem though? Mike has applied a patch for this that'll be
applied to 3.5-rcX and hence trickle into 3.6.
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