Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751490AbaAPWnS (ORCPT ); Thu, 16 Jan 2014 17:43:18 -0500 Received: from mail-gg0-f174.google.com ([209.85.161.174]:43617 "EHLO mail-gg0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750775AbaAPWnP (ORCPT ); Thu, 16 Jan 2014 17:43:15 -0500 Date: Thu, 16 Jan 2014 14:43:11 -0800 (PST) From: David Rientjes X-X-Sender: rientjes@chino.kir.corp.google.com To: Philipp Hachtmann cc: Andrew Morton , hannes@cmpxchg.org, liuj97@gmail.com, santosh.shilimkar@ti.com, grygorii.strashko@ti.com, iamjoonsoo.kim@lge.com, robin.m.holt@gmail.com, yinghai@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] mm/nobootmem: Fix unused variable In-Reply-To: <1389879186-43649-1-git-send-email-phacht@linux.vnet.ibm.com> Message-ID: References: <1389879186-43649-1-git-send-email-phacht@linux.vnet.ibm.com> User-Agent: Alpine 2.02 (DEB 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 16 Jan 2014, Philipp Hachtmann wrote: > diff --git a/mm/nobootmem.c b/mm/nobootmem.c > index e2906a5..12cbb04 100644 > --- a/mm/nobootmem.c > +++ b/mm/nobootmem.c > @@ -116,9 +116,13 @@ static unsigned long __init __free_memory_core(phys_addr_t start, > static unsigned long __init free_low_memory_core_early(void) > { > unsigned long count = 0; > - phys_addr_t start, end, size; > + phys_addr_t start, end; > u64 i; > > +#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK > + phys_addr_t size; > +#endif > + > for_each_free_mem_range(i, NUMA_NO_NODE, &start, &end, NULL) > count += __free_memory_core(start, end); > Two options: (1) add a helper function declared for CONFIG_ARCH_DISCARD_MEMBLOCK that returns the count to add and is empty otherwise, or (2) initialize size to zero in its definition. It's much better than #ifdef's inside the function for a variable declaration. Also, since this is already in -mm, you'll want this fix folded into the original patch, "mm/nobootmem: free_all_bootmem again", so it's probably best to name it "mm/nobootmem: free_all_bootmem again fix". -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/