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=-17.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,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 899A6C4320A for ; Wed, 11 Aug 2021 00:43:25 +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 2DFC260EDF for ; Wed, 11 Aug 2021 00:43:25 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 2DFC260EDF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=oBHiQU0KDhDvPwo9dBwQpJEM/zjN4GrGyd3J0oxADk0=; b=hnlmNpEt1Nw3ov 4osNBeKMIsrQkc7BaZKo4u+UfHE3l5bD5OSbcDzpKm4qRC+gjQRFje//Fd1z9Rid5F4Nzvajin8SF Hjx4AEmcrfSklQ1/YHXCjAy7bGVUrP8eAgcUlxJOCdxXnxM8ewHNFK/1hCvkEFQXqO7LiV7rxIf7f OhaykiAYv2S3PUFBR9yLjPTVoJQSk2AiMH0c9KyhgoyJYtw+B3Bad78qam7XbReMZcoW5syPaSleC NHNgefLACToS82SntH2BNj8ZHsCYQE8lgPAVSR0zKoozWhZASpFLLJcwnzyqa1QZrYqfmM/ZiyRPB W+SmgTFrPGUYmzdDB9EQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mDcL6-0056jR-DH; Wed, 11 Aug 2021 00:43:24 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mDcL1-0056dD-Pp for linux-snps-arc@lists.infradead.org; Wed, 11 Aug 2021 00:43:21 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id CA36C60EB7; Wed, 11 Aug 2021 00:43:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1628642599; bh=BuXcRdzmWNIaOIOjXT4hDOm7eBJ0j1zqPiGdlTfIt3c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NAIjZVUTNQb2BJzsdAr3U4xsFLcKsv+4Ht25B1BbDsNPwpB2KSQF+Y4jmTlLMhWEs Xb18N17B7SI7QdUMHiWuwy30IeczfwO+Rz6FtHYMw/1/sr73OIjotSX6lotAgkIOYn 8luy7zPkY7o2GjM3gi4Afbk4/0BR5v7mUw3B29Oskq3ctOd/HhHQBpDgY1eNL98w/Q 0kRFfAlZdQkWx/WQrN21NQyyqGRBQpV2J7fwiIHYu4kUDULM/pHYEBAGzFmHXaQQLj Tdzv6c1H9x1bsnRnbY7wupfVVXtAMIrhmMv/BkRQD3Yzsf9BNqYlXuzw/MdcDbW7sZ /kQlMijewEjnQ== From: Vineet Gupta To: linux-snps-arc@lists.infradead.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Anshuman Khandual , Mike Rapoport , Vineet Gupta Subject: [PATCH 06/18] ARC: mm: Enable STRICT_MM_TYPECHECKS Date: Tue, 10 Aug 2021 17:42:46 -0700 Message-Id: <20210811004258.138075-7-vgupta@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210811004258.138075-1-vgupta@kernel.org> References: <20210811004258.138075-1-vgupta@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210810_174319_929964_F4D2D9E1 X-CRM114-Status: GOOD ( 11.76 ) X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+linux-snps-arc=archiver.kernel.org@lists.infradead.org In the past I've refrained from doing this (atleast 2 times) due to the slight code bloat due to ABI implications of pte_t etc becoming sttuct Per ARC ABI, functions return struct via memory and not through register r0, even if the struct would fits in register(s) - caller allocates space on stack and passes the address as first arg (r0), shifting rest of args by one - callee creates return struct in memory (referenced via r0) This time around the code actually shrunk slightly (due to subtle inlining heuristic effects), but still slightly inefficient due to return values passed through memory. That however seems like a small cost compared to maintenance burden given the impending new mmu support for page walk etc Signed-off-by: Vineet Gupta --- arch/arc/include/asm/page.h | 26 -------------------------- arch/arc/mm/ioremap.c | 2 +- 2 files changed, 1 insertion(+), 27 deletions(-) diff --git a/arch/arc/include/asm/page.h b/arch/arc/include/asm/page.h index 4a9d33372fe2..c4ac827379cd 100644 --- a/arch/arc/include/asm/page.h +++ b/arch/arc/include/asm/page.h @@ -34,12 +34,6 @@ void copy_user_highpage(struct page *to, struct page *from, unsigned long u_vaddr, struct vm_area_struct *vma); void clear_user_page(void *to, unsigned long u_vaddr, struct page *page); -#undef STRICT_MM_TYPECHECKS - -#ifdef STRICT_MM_TYPECHECKS -/* - * These are used to make use of C type-checking.. - */ typedef struct { #ifdef CONFIG_ARC_HAS_PAE40 unsigned long long pte; @@ -64,26 +58,6 @@ typedef struct { #define pte_pgprot(x) __pgprot(pte_val(x)) -#else /* !STRICT_MM_TYPECHECKS */ - -#ifdef CONFIG_ARC_HAS_PAE40 -typedef unsigned long long pte_t; -#else -typedef unsigned long pte_t; -#endif -typedef unsigned long pgd_t; -typedef unsigned long pgprot_t; - -#define pte_val(x) (x) -#define pgd_val(x) (x) -#define pgprot_val(x) (x) -#define __pte(x) (x) -#define __pgd(x) (x) -#define __pgprot(x) (x) -#define pte_pgprot(x) (x) - -#endif - typedef pte_t * pgtable_t; /* diff --git a/arch/arc/mm/ioremap.c b/arch/arc/mm/ioremap.c index 95c649fbc95a..052bbd8b1e5f 100644 --- a/arch/arc/mm/ioremap.c +++ b/arch/arc/mm/ioremap.c @@ -39,7 +39,7 @@ void __iomem *ioremap(phys_addr_t paddr, unsigned long size) if (arc_uncached_addr_space(paddr)) return (void __iomem *)(u32)paddr; - return ioremap_prot(paddr, size, PAGE_KERNEL_NO_CACHE); + return ioremap_prot(paddr, size, pgprot_val(PAGE_KERNEL_NO_CACHE)); } EXPORT_SYMBOL(ioremap); -- 2.25.1 _______________________________________________ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc