From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-f178.google.com (mail-wi0-f178.google.com [209.85.212.178]) by kanga.kvack.org (Postfix) with ESMTP id 64EA4280260 for ; Fri, 3 Jul 2015 08:46:29 -0400 (EDT) Received: by wiwl6 with SMTP id l6so225976579wiw.0 for ; Fri, 03 Jul 2015 05:46:29 -0700 (PDT) Received: from e06smtp13.uk.ibm.com (e06smtp13.uk.ibm.com. [195.75.94.109]) by mx.google.com with ESMTPS id vf7si14340046wjc.127.2015.07.03.05.46.19 for (version=TLSv1 cipher=AES128-SHA bits=128/128); Fri, 03 Jul 2015 05:46:20 -0700 (PDT) Received: from /spool/local by e06smtp13.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 3 Jul 2015 13:46:19 +0100 Received: from b06cxnps3074.portsmouth.uk.ibm.com (d06relay09.portsmouth.uk.ibm.com [9.149.109.194]) by d06dlp02.portsmouth.uk.ibm.com (Postfix) with ESMTP id DDEF92190056 for ; Fri, 3 Jul 2015 13:45:54 +0100 (BST) Received: from d06av03.portsmouth.uk.ibm.com (d06av03.portsmouth.uk.ibm.com [9.149.37.213]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t63CkGfU30933202 for ; Fri, 3 Jul 2015 12:46:16 GMT Received: from d06av03.portsmouth.uk.ibm.com (localhost [127.0.0.1]) by d06av03.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t63CkGIS004789 for ; Fri, 3 Jul 2015 06:46:16 -0600 From: Dominik Dingel Subject: [PATCH 4/4] s390/hugetlb: add hugepages_supported define Date: Fri, 3 Jul 2015 14:46:09 +0200 Message-Id: <1435927569-41132-5-git-send-email-dingel@linux.vnet.ibm.com> In-Reply-To: <1435927569-41132-1-git-send-email-dingel@linux.vnet.ibm.com> References: <1435927569-41132-1-git-send-email-dingel@linux.vnet.ibm.com> Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton , linux-kernel@vger.kernel.org Cc: Martin Schwidefsky , Heiko Carstens , linux390@de.ibm.com, Dominik Dingel , Christian Borntraeger , Michael Holzheu , linux-s390@vger.kernel.org, linux-mm@kvack.org, Gerald Schaefer On s390 we only can enable hugepages if the underlying hardware/hypervisor also does support this. Common code now would assume this to be signaled by setting HPAGE_SHIFT to 0. But on s390, where we only support one hugepage size, there is a link between HPAGE_SHIFT and pageblock_order. So instead of setting HPAGE_SHIFT to 0, we will implement the check for the hardware capability. Signed-off-by: Dominik Dingel --- arch/s390/include/asm/hugetlb.h | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/s390/include/asm/hugetlb.h b/arch/s390/include/asm/hugetlb.h index 0130d03..d9be7c0 100644 --- a/arch/s390/include/asm/hugetlb.h +++ b/arch/s390/include/asm/hugetlb.h @@ -14,6 +14,7 @@ #define is_hugepage_only_range(mm, addr, len) 0 #define hugetlb_free_pgd_range free_pgd_range +#define hugepages_supported() (MACHINE_HAS_HPAGE) void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte); -- 2.3.8 -- 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