linux-kernel - Re: [PATCH] misc: suppress build warning

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Message-ID: <CA+V-a8vH9McTLVSWhQZun04AP7SZ7wGHeobBK1hA+EKn5fYgKw@mail.gmail.com>
Date:	Thu, 4 Dec 2014 15:13:00 +0000
From:	Prabhakar Lad <prabhakar.csengg@...il.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] misc: suppress build warning

On Thu, Dec 4, 2014 at 2:59 PM, Arnd Bergmann <arnd@...db.de> wrote:
> On Thursday 04 December 2014 14:38:30 Lad, Prabhakar wrote:
>> this patch fixes following build warning:
>>
>> drivers/misc/ioc4.c: In function ‘ioc4_probe’:
>> drivers/misc/ioc4.c:194:16: warning: ‘start’ may be used uninitialized in this function [-Wmaybe-uninitialized]
>>   period = (end - start) /
>>                 ^
>> drivers/misc/ioc4.c:148:11: note: ‘start’ was declared here
>>   uint64_t start, end, period;
>>
>> Signed-off-by: Lad, Prabhakar <prabhakar.csengg@...il.com>
>
> Please explain why the compiler thinks there is a bug, why you
> are sure that there isn't, and why you picked '0' as the
> initialization value.
>
Its a false positive, to suppress the warning '0' was picked.

Thanks,
--Prabhakar Lad
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