linux-kernel - Re: [PATCH v2] xfs: Silence bounds checking compiler warning

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Message-ID: <m2boxocvb5.fsf@firstfloor.org>
Date:	Thu, 23 Jun 2011 10:27:26 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	Maarten Lankhorst <m.b.lankhorst@...il.com>
Cc:	Alex Elder <aelder@....com>, xfs-masters@....sgi.com,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	xfs@....sgi.com
Subject: Re: [PATCH v2] xfs: Silence bounds checking compiler warning

Maarten Lankhorst <m.b.lankhorst@...il.com> writes:

> gcc with -Warray-bounds generates a false positive on this
> since xfs defines the struct with u8 name[1]; to be able to
> add a tag at the end.

A better way would be to define it as name[0]. Then the compiler
would know it's a VLA. You may need to check noone relies on
the one byte though.

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only
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