From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:36745 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933062AbcFLVfz (ORCPT ); Sun, 12 Jun 2016 17:35:55 -0400 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, "Heiko Carstens" , "Christian Borntraeger" , "Gerald Schaefer" , "Dominik Dingel" , "Martin Schwidefsky" , "Michael Holzheu" , "Linus Torvalds" Date: Sun, 12 Jun 2016 22:34:42 +0100 Message-ID: Subject: [PATCH 3.2 22/46] mm: hugetlb: allow hugepages_supported to be architecture specific In-Reply-To: Sender: stable-owner@vger.kernel.org List-ID: 3.2.81-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Dominik Dingel commit 2531c8cf56a640cd7d17057df8484e570716a450 upstream. s390 has a constant hugepage size, by setting HPAGE_SHIFT we also change e.g. the pageblock_order, which should be independent in respect to hugepage support. With this patch every architecture is free to define how to check for hugepage support. Signed-off-by: Dominik Dingel Acked-by: Martin Schwidefsky Cc: Heiko Carstens Cc: Christian Borntraeger Cc: Michael Holzheu Cc: Gerald Schaefer Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Ben Hutchings --- include/linux/hugetlb.h | 17 ++++++++--------- 1 file changed, 8 insertions(+), 9 deletions(-) --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -344,15 +344,14 @@ static inline pgoff_t basepage_index(str return __basepage_index(page); } -static inline bool hugepages_supported(void) -{ - /* - * Some platform decide whether they support huge pages at boot - * time. On these, such as powerpc, HPAGE_SHIFT is set to 0 when - * there is no such support - */ - return HPAGE_SHIFT != 0; -} +#ifndef hugepages_supported +/* + * Some platform decide whether they support huge pages at boot + * time. Some of them, such as powerpc, set HPAGE_SHIFT to 0 + * when there is no such support + */ +#define hugepages_supported() (HPAGE_SHIFT != 0) +#endif #else struct hstate {};