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

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Date:	Sat, 22 Mar 2014 08:45:49 -0700
From:	Behan Webster <behanw@...verseincode.com>
To:	Arnd Bergmann <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 03/22/14 03:01, Arnd Bergmann wrote:
> On Saturday 22 March 2014, behanw@...verseincode.com wrote:
>> diff --git a/include/asm-generic/cmpxchg-local.h b/include/asm-generic/cmpxchg-local.h
>> index d8d4c89..4c41bb8 100644
>> --- a/include/asm-generic/cmpxchg-local.h
>> +++ b/include/asm-generic/cmpxchg-local.h
>> @@ -41,6 +41,7 @@ static inline unsigned long __cmpxchg_local_generic(volatile void *ptr,
>>                  break;
>>          default:
>>                  wrong_size_cmpxchg(ptr);
>> +               prev = 0;
>>          }
>>          raw_local_irq_restore(flags);
>>          return prev;
>
> How about using __unreachable() instead to annotate the fact that you won't
> get here?
Yours is a _much_ better idea. Will fix.

Thanks,

Behan

-- 
Behan Webster
behanw@...verseincode.com

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