From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 15270C43381 for ; Thu, 21 Feb 2019 11:36:10 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D51552086C for ; Thu, 21 Feb 2019 11:36:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="ZJijbxzN" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D51552086C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=fJQQ2wf9LHFs9TabCvRsxpq7Nd1EHwprw43v4JUNvVA=; b=ZJijbxzNHv/ZTm cYjjeusrgNDLgKypnukcq4rItI3A+2McMsm1rZ3mh+cSY7IbWUfZtRJ8ji6BgEqapMih9NM2qLzut WTqrlluoAf2y+Us7qm5Af5hvgnnlH/xpAsjRfdXJXup0MidpiKzrGI5ttcywjuyEaujzRkD39GuT4 U9cRFX5c1u1V2FqZQnF/yIUyGLVTePKu4+YBNJX9DJ+xnl4DXP8l9Qm6xzAtt5JzVhlDfQRSFK0Qc Wed5iCHYf6AGdNYwcllCoG4UO2dqpUU8nDdHnilev8bl91s8aA2qGkaXLRCziA5H9cenmhe8W0R1x FVE6SlV12xyap8FEbVfA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gwme3-0004uu-DY; Thu, 21 Feb 2019 11:36:03 +0000 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70] helo=foss.arm.com) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gwmdT-0004Eo-Ba for linux-arm-kernel@lists.infradead.org; Thu, 21 Feb 2019 11:35:29 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 0263315AB; Thu, 21 Feb 2019 03:35:27 -0800 (PST) Received: from e112269-lin.arm.com (e112269-lin.cambridge.arm.com [10.1.196.69]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 75F723F5C1; Thu, 21 Feb 2019 03:35:23 -0800 (PST) From: Steven Price To: linux-mm@kvack.org Subject: [PATCH v2 03/13] mm: Add generic p?d_large() macros Date: Thu, 21 Feb 2019 11:34:52 +0000 Message-Id: <20190221113502.54153-4-steven.price@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190221113502.54153-1-steven.price@arm.com> References: <20190221113502.54153-1-steven.price@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190221_033527_448805_D3DBFA7A X-CRM114-Status: GOOD ( 12.68 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , x86@kernel.org, Arnd Bergmann , Ard Biesheuvel , Peter Zijlstra , Catalin Marinas , Dave Hansen , Will Deacon , linux-kernel@vger.kernel.org, Steven Price , =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= , Ingo Molnar , Borislav Petkov , Andy Lutomirski , "H. Peter Anvin" , James Morse , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, "Liang, Kan" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: James Morse Exposing the pud/pgd levels of the page tables to walk_page_range() means we may come across the exotic large mappings that come with large areas of contiguous memory (such as the kernel's linear map). For architectures that don't provide p?d_large() macros, provided a does nothing default. Signed-off-by: James Morse Signed-off-by: Steven Price --- include/asm-generic/pgtable.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h index 05e61e6c843f..f0de24100ac6 100644 --- a/include/asm-generic/pgtable.h +++ b/include/asm-generic/pgtable.h @@ -1186,4 +1186,23 @@ static inline bool arch_has_pfn_modify_check(void) #define mm_pmd_folded(mm) __is_defined(__PAGETABLE_PMD_FOLDED) #endif +/* + * p?d_large() - true if this entry is a final mapping to a physical address. + * This differs from p?d_huge() by the fact that they are always available (if + * the architecture supports large pages at the appropriate level) even + * if CONFIG_HUGETLB_PAGE is not defined. + */ +#ifndef pgd_large +#define pgd_large(x) 0 +#endif +#ifndef p4d_large +#define p4d_large(x) 0 +#endif +#ifndef pud_large +#define pud_large(x) 0 +#endif +#ifndef pmd_large +#define pmd_large(x) 0 +#endif + #endif /* _ASM_GENERIC_PGTABLE_H */ -- 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel