From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail202.messagelabs.com (mail202.messagelabs.com [216.82.254.227]) by kanga.kvack.org (Postfix) with SMTP id 180066B01B1 for ; Fri, 19 Mar 2010 16:07:06 -0400 (EDT) Subject: Re: [PATCH 1/2] pagemap: add #ifdefs CONFIG_HUGETLB_PAGE on code walking hugetlb vma From: Matt Mackall In-Reply-To: <1268979996-12297-1-git-send-email-n-horiguchi@ah.jp.nec.com> References: <1268979996-12297-1-git-send-email-n-horiguchi@ah.jp.nec.com> Content-Type: text/plain; charset="UTF-8" Date: Fri, 19 Mar 2010 15:07:01 -0500 Message-ID: <1269029221.9534.145.camel@calx> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Naoya Horiguchi Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, akpm@linux-foundation.org, andi.kleen@intel.com, fengguang.wu@intel.com List-ID: On Fri, 2010-03-19 at 15:26 +0900, Naoya Horiguchi wrote: > If !CONFIG_HUGETLB_PAGE, pagemap_hugetlb_range() is never called. > So put it (and its calling function) into #ifdef block. > > Signed-off-by: Naoya Horiguchi Acked-by: Matt Mackall > --- > fs/proc/task_mmu.c | 4 ++++ > 1 files changed, 4 insertions(+), 0 deletions(-) > > diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c > index 183f8ff..2a3ef17 100644 > --- a/fs/proc/task_mmu.c > +++ b/fs/proc/task_mmu.c > @@ -652,6 +652,7 @@ static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end, > return err; > } > > +#ifdef CONFIG_HUGETLB_PAGE > static u64 huge_pte_to_pagemap_entry(pte_t pte, int offset) > { > u64 pme = 0; > @@ -695,6 +696,7 @@ static int pagemap_hugetlb_range(pte_t *pte, unsigned long addr, > > return err; > } > +#endif /* HUGETLB_PAGE */ > > /* > * /proc/pid/pagemap - an array mapping virtual pages to pfns > @@ -788,7 +790,9 @@ static ssize_t pagemap_read(struct file *file, char __user *buf, > > pagemap_walk.pmd_entry = pagemap_pte_range; > pagemap_walk.pte_hole = pagemap_pte_hole; > +#ifdef CONFIG_HUGETLB_PAGE > pagemap_walk.hugetlb_entry = pagemap_hugetlb_range; > +#endif > pagemap_walk.mm = mm; > pagemap_walk.private = ± > -- http://selenic.com : development and support for Mercurial and Linux -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org