From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f43.google.com (mail-pa0-f43.google.com [209.85.220.43]) by kanga.kvack.org (Postfix) with ESMTP id D3B5E828DE for ; Fri, 8 Jan 2016 14:49:57 -0500 (EST) Received: by mail-pa0-f43.google.com with SMTP id uo6so269212844pac.1 for ; Fri, 08 Jan 2016 11:49:57 -0800 (PST) Received: from mga11.intel.com (mga11.intel.com. [192.55.52.93]) by mx.google.com with ESMTP id m2si6920649pfj.159.2016.01.08.11.49.56 for ; Fri, 08 Jan 2016 11:49:56 -0800 (PST) From: Matthew Wilcox Subject: [PATCH v3 4/8] mincore: Add support for PUDs Date: Fri, 8 Jan 2016 14:49:48 -0500 Message-Id: <1452282592-27290-5-git-send-email-matthew.r.wilcox@intel.com> In-Reply-To: <1452282592-27290-1-git-send-email-matthew.r.wilcox@intel.com> References: <1452282592-27290-1-git-send-email-matthew.r.wilcox@intel.com> Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton Cc: Matthew Wilcox , linux-mm@kvack.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, x86@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 2a565ed..8e6ce12 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) { @@ -176,6 +188,7 @@ 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, -- 2.6.4 -- 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