From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757410AbcAaMJp (ORCPT ); Sun, 31 Jan 2016 07:09:45 -0500 Received: from mga02.intel.com ([134.134.136.20]:58427 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757303AbcAaMJo (ORCPT ); Sun, 31 Jan 2016 07:09:44 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.22,374,1449561600"; d="scan'208";a="905182759" From: Matthew Wilcox To: Andrew Morton Cc: Matthew Wilcox , linux-mm@kvack.org, linux-nvdimm@ml01.01.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, x86@kernel.org Subject: [PATCH v4 4/8] mincore: Add support for PUDs Date: Sun, 31 Jan 2016 23:09:31 +1100 Message-Id: <1454242175-16870-5-git-send-email-matthew.r.wilcox@intel.com> X-Mailer: git-send-email 2.7.0.rc3 In-Reply-To: <1454242175-16870-1-git-send-email-matthew.r.wilcox@intel.com> References: <1454242175-16870-1-git-send-email-matthew.r.wilcox@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Matthew Wilcox We don't actually care about the contents of the PUD, as long as it's present (which is checked by the pagewalk code), so just set the bits to indicate presence and return. Signed-off-by: Matthew Wilcox --- mm/mincore.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/mm/mincore.c b/mm/mincore.c index 563f320..948a906 100644 --- a/mm/mincore.c +++ b/mm/mincore.c @@ -108,6 +108,18 @@ static int mincore_unmapped_range(unsigned long addr, unsigned long end, return 0; } +static int mincore_pud_range(pud_t *pud, unsigned long addr, unsigned long end, + struct mm_walk *walk) +{ + unsigned char *vec = walk->private; + int nr = (end - addr) >> PAGE_SHIFT; + + memset(vec, 1, nr); + walk->private += nr; + + return 0; +} + static int mincore_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end, struct mm_walk *walk) { @@ -177,6 +189,7 @@ static long do_mincore(unsigned long addr, unsigned long pages, unsigned char *v unsigned long end; int err; struct mm_walk mincore_walk = { + .pud_entry = mincore_pud_range, .pmd_entry = mincore_pte_range, .pte_hole = mincore_unmapped_range, .hugetlb_entry = mincore_hugetlb, -- 2.7.0.rc3