From: Peter Zijlstra <peterz@infradead•org>
To: Gregory CLEMENT <gregory.clement@free-electrons•com>
Cc: "linux-kernel@vger•kernel.org" <linux-kernel@vger•kernel.org>,
linux-next@vger•kernel.org,
Johannes Berg <johannes.berg@intel•com>,
Steven Rostedt <rostedt@goodmis•org>,
Andrew Morton <akpm@linux-foundation•org>
Subject: Re: Regression with wait_event_timeout in next-20140226
Date: Wed, 26 Feb 2014 17:50:43 +0100 [thread overview]
Message-ID: <20140226165043.GA22802@laptop.programming.kicks-ass.net> (raw)
In-Reply-To: <530E17C7.1030504@free-electrons.com>
On Wed, Feb 26, 2014 at 05:35:19PM +0100, Gregory CLEMENT wrote:
> Hi,
>
> while testing next-20140226 I got an issue with the function
> wait_event_timeout. When this function timed out instead of returning
> 0, it returned the value of the timeout passed in parameter. I found
> that reverting "sched/wait: Suppress Sparse 'variable shadowing'
> warning" fixed this regression.
>
> I got this issue in the driver drivers/i2c/busses/i2c-mv64xxx.c.
Ah indeed. We actually rely on the shadowing for ___wait_cond_timeout().
We further used the __ret variable in __wait_event_timeout()'s cmd
argument: __ret = schedule_timeout(__ret). That now explicitly uses the
wrong __ret.
Yeah, we need to pull that patch.
next prev parent reply other threads:[~2014-02-26 16:50 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-26 16:35 Regression with wait_event_timeout in next-20140226 Gregory CLEMENT
2014-02-26 16:50 ` Peter Zijlstra [this message]
2014-02-26 22:25 ` Andrew Morton
2014-02-26 22:35 ` Peter Zijlstra
2014-04-09 11:16 ` Peter Zijlstra
2014-04-09 19:05 ` Andrew Morton
2014-02-27 3:12 ` Stephen Rothwell
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