From patchwork Wed Aug 2 09:49:04 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Punit Agrawal X-Patchwork-Id: 9876485 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 0C6F060390 for ; Wed, 2 Aug 2017 09:52:43 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E6D2128794 for ; Wed, 2 Aug 2017 09:52:42 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DB0EF28796; Wed, 2 Aug 2017 09:52:42 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 5398028794 for ; Wed, 2 Aug 2017 09:52:42 +0000 (UTC) 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:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: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=LJRpC491MpSEqP7yNs3RkqdyAE9ClOrUj8j6yZKFQjM=; b=cZ3rB3d3OP86XT8MfQPVJ3Fak3 uZMLqHIDnJrlL0/M5UmpYZYBghEmAeqD1YqEEr3vN0R1R8VvisWZS5JKA/2C+MD7hL9osiRHMOG/N st3DbW+yhKOi8wSxNsK2Ebeght6FMd7s98p09D+OjFf4vyp0N0Xa4VDUaai22O3EKstucgI++hfwZ Clxnjr64YFo4nAwSjPm8ydrc7AKqWCSwOEHwGMngg5XpT2T/MzwBBk3EIJVrNPL8Eia6yrixPlWK3 91F8DM1/ZaPv8KEjLPO/0SYNoA6h03bIYsO8Up7jlI48L4Ecd01FL4HyKCsi+KrE8OIZOJ8iMeELw srFUXbrQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dcqKT-0002mx-Ur; Wed, 02 Aug 2017 09:52:37 +0000 Received: from foss.arm.com ([217.140.101.70]) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dcqJf-0001uo-0E for linux-arm-kernel@lists.infradead.org; Wed, 02 Aug 2017 09:52:15 +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 AE3F415A2; Wed, 2 Aug 2017 02:51:26 -0700 (PDT) Received: from localhost (e105922-lin.cambridge.arm.com [10.1.207.56]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 2AAD23F3E1; Wed, 2 Aug 2017 02:51:26 -0700 (PDT) From: Punit Agrawal To: will.deacon@arm.com, catalin.marinas@arm.com Subject: [PATCH v5 9/9] arm64: hugetlb: Cleanup setup_hugepagesz Date: Wed, 2 Aug 2017 10:49:04 +0100 Message-Id: <20170802094904.27749-10-punit.agrawal@arm.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170802094904.27749-1-punit.agrawal@arm.com> References: <20170802094904.27749-1-punit.agrawal@arm.com> X-ARM-No-Footer: FoSSMail X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170802_025147_460767_84663CAE X-CRM114-Status: UNSURE ( 8.91 ) X-CRM114-Notice: Please train this message. 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@arm.com, David Woods , Steve Capper , Punit Agrawal , stable@vger.kernel.org, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Steve Capper Replace a lot of if statements with switch and case labels to make it much clearer which huge page sizes are supported. Also, we prevent PUD_SIZE from being used on systems not running with 4KB PAGE_SIZE. Before if one supplied PUD_SIZE in these circumstances, then unusuable huge page sizes would be in use. Fixes: 084bd29810a5 ("ARM64: mm: HugeTLB support.") Cc: David Woods Cc: Signed-off-by: Steve Capper Signed-off-by: Punit Agrawal Reviewed-by: Mark Rutland --- arch/arm64/mm/hugetlbpage.c | 26 +++++++++++++------------- 1 file changed, 13 insertions(+), 13 deletions(-) diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c index a10dfbd0ffd5..b5dc7cca3f45 100644 --- a/arch/arm64/mm/hugetlbpage.c +++ b/arch/arm64/mm/hugetlbpage.c @@ -381,20 +381,20 @@ static __init int setup_hugepagesz(char *opt) { unsigned long ps = memparse(opt, &opt); - if (ps == PMD_SIZE) { - hugetlb_add_hstate(PMD_SHIFT - PAGE_SHIFT); - } else if (ps == PUD_SIZE) { - hugetlb_add_hstate(PUD_SHIFT - PAGE_SHIFT); - } else if (ps == (PAGE_SIZE * CONT_PTES)) { - hugetlb_add_hstate(CONT_PTE_SHIFT); - } else if (ps == (PMD_SIZE * CONT_PMDS)) { - hugetlb_add_hstate((PMD_SHIFT + CONT_PMD_SHIFT) - PAGE_SHIFT); - } else { - hugetlb_bad_size(); - pr_err("hugepagesz: Unsupported page size %lu K\n", ps >> 10); - return 0; + switch (ps) { +#ifdef CONFIG_ARM64_4K_PAGES + case PUD_SIZE: +#endif + case PMD_SIZE * CONT_PMDS: + case PMD_SIZE: + case PAGE_SIZE * CONT_PTES: + hugetlb_add_hstate(ilog2(ps) - PAGE_SHIFT); + return 1; } - return 1; + + hugetlb_bad_size(); + pr_err("hugepagesz: Unsupported page size %lu K\n", ps >> 10); + return 0; } __setup("hugepagesz=", setup_hugepagesz);