From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: 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-Archive: List-Post: 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 List-ID: 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