linux-kernel - Re: [PATCH] LLVMLinux: Remove warning about returning an uninitialized variable

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Message-ID: <5339EA0A.4040200@zytor.com>
Date:	Mon, 31 Mar 2014 15:19:54 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Behan Webster <behanw@...verseincode.com>, arnd@...db.de
CC:	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
	dwmw2@...radead.org, pageexec@...email.hu,
	Mark Charlebois <charlebm@...il.com>
Subject: Re: [PATCH] LLVMLinux: Remove warning about returning an uninitialized
 variable

On 03/31/2014 03:16 PM, Behan Webster wrote:
>>>
>> __compiletime_error traps at compile time rather than link time, which
>> is what you want.
> The idea is to remove the compile time warning that the return code
> "prev" isn't initialized in the default case. Indicating that
> wrong_size_cmpxchg doesn't return fixes that false positive.
> 

Perhaps __compiletime_error() should have __noreturn built in?

	-hpa


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