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Date: Wed, 8 May 2013 16:34:11 +0200
From: Borislav Petkov <bp@alien8.de>
To: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: lkml <linux-kernel@vger.kernel.org>
Subject: ipc/shm.c:494:18: warning: =?utf-8?Q?unuse?=
 =?utf-8?B?ZCB2YXJpYWJsZSDigJhoc+KAmQ==?= [-Wunused-variable]
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Hi,

looks like this warning came in with
af73e4d9506d3b797509f3c030e7dcd554f7d9c4 and fires in the

# CONFIG_HUGETLB_PAGE is not set

case because

	struct hstate *hs = hstate_sizelog((shmflg >> SHM_HUGE_SHIFT)
                                        & SHM_HUGE_MASK);

becomes

	struct hstate *hs = ((void *)0)

due to

#define hstate_sizelog(s) NULL

Hmmm, I don't have a quick solution off the top of my head from staring
at the code.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
--