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

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Message-ID: <12630889.EI0exeDoNc@wuerfel>
Date:	Thu, 04 Dec 2014 15:59:28 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	"Lad, Prabhakar" <prabhakar.csengg@...il.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] misc: suppress build warning

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.

	Arnd
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