From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e23smtp03.au.ibm.com (e23smtp03.au.ibm.com [202.81.31.145]) (using TLSv1.2 with cipher CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id D3F001A0118 for ; Wed, 9 Mar 2016 23:11:59 +1100 (AEDT) Received: from localhost by e23smtp03.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 9 Mar 2016 22:11:57 +1000 Received: from d23relay09.au.ibm.com (d23relay09.au.ibm.com [9.185.63.181]) by d23dlp02.au.ibm.com (Postfix) with ESMTP id B7BDA2BB005B for ; Wed, 9 Mar 2016 23:11:48 +1100 (EST) Received: from d23av01.au.ibm.com (d23av01.au.ibm.com [9.190.234.96]) by d23relay09.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u29CBeOp50659458 for ; Wed, 9 Mar 2016 23:11:48 +1100 Received: from d23av01.au.ibm.com (localhost [127.0.0.1]) by d23av01.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u29CBFl0021451 for ; Wed, 9 Mar 2016 23:11:16 +1100 From: Anshuman Khandual To: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Cc: hughd@google.com, kirill@shutemov.name, n-horiguchi@ah.jp.nec.com, akpm@linux-foundation.org, mgorman@techsingularity.net, aneesh.kumar@linux.vnet.ibm.com, mpe@ellerman.id.au Subject: [RFC 3/9] mm/gup: Make follow_page_mask function PGD implementation aware Date: Wed, 9 Mar 2016 17:40:44 +0530 Message-Id: <1457525450-4262-3-git-send-email-khandual@linux.vnet.ibm.com> In-Reply-To: <1457525450-4262-1-git-send-email-khandual@linux.vnet.ibm.com> References: <1457525450-4262-1-git-send-email-khandual@linux.vnet.ibm.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Currently the function 'follow_page_mask' does not take into account PGD based huge page implementation. This change achieves that and makes it complete. Signed-off-by: Anshuman Khandual --- mm/gup.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/mm/gup.c b/mm/gup.c index 7bf19ff..53a2013 100644 --- a/mm/gup.c +++ b/mm/gup.c @@ -232,6 +232,12 @@ struct page *follow_page_mask(struct vm_area_struct *vma, pgd = pgd_offset(mm, address); if (pgd_none(*pgd) || unlikely(pgd_bad(*pgd))) return no_page_table(vma, flags); + if (pgd_huge(*pgd) && vma->vm_flags & VM_HUGETLB) { + page = follow_huge_pgd(mm, address, pgd, flags); + if (page) + return page; + return no_page_table(vma, flags); + } pud = pud_offset(pgd, address); if (pud_none(*pud)) -- 2.1.0