From patchwork Wed Jun 14 16:55:04 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jisheng Zhang X-Patchwork-Id: 13280245 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 2C3E8EB64DB for ; Wed, 14 Jun 2023 17:06:39 +0000 (UTC) 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=lbOKQvHqJsgtuvVBw1Oc8OMoelL/doHyUinBxSDbKSI=; b=RmlPNdwHDGWWUy FS4qL6qz/sULFlbfkMUFgt5UttCf6QVm1pR8eQ7XUh8IQ9oqT/qDH3DO+hTCqzzghhAtkmJSUnD+o o8gtj8QcHRhI94o+ZiLRVM2nEnGbaMUZSB57HudOCuv5Qgo08hm0shW+n0Rz/2phP5iPqooxHRobp wRQ88rZk3/NHYQsCWtevl96cYLtWq3kdshJaD5nKBLrkWfwDsB1oT1EouvBE+YlxkHFuOTRAisQ+W NrlGQYngGDFdss8B9BEEv04T/9iOH1s1x8kBlJifXrlrRndMNH5GOCNMQ5FmiMP84XAA9JNyrzS+i YwmNmjXLMke41J4Oc47A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1q9Tx3-00CIgF-2U; Wed, 14 Jun 2023 17:06:33 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1q9Tx1-00CIea-0G for linux-riscv@lists.infradead.org; Wed, 14 Jun 2023 17:06:32 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 936F4644D0; Wed, 14 Jun 2023 17:06:30 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B95D1C433C0; Wed, 14 Jun 2023 17:06:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1686762390; bh=r6WmK6pN8JZLuhkdUWl3EWEdgWXW6Xnybl6dJtROQn4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nZaXe/FqPg/6fky/CfXosBUmIW2Noo0nes4r5ymfjKVsNeqFuSRyQAxyHOhicbU4t xguaueQOiZ7lg7LuC9SFyUrh2P0DrP3BRZFk6aEj9nORUFle74Q5tC3e4MSpJGVIf6 iAj3cXwcdUq7gEUrskoIk0W5QGsDA6llLPqkweStT0KmYkBlSmlFQOTLsM/fQ1O0Qk 56pLS9sQSNLyZrPYWsipzdZWhQ0Mv8kFIuGEJ5pgp+58IqvqMeiX8ZtjYPh+F2mr5c RBtDCpKC/7v0rAvStUEsSXbFRMkDH0hhOUcuriJEokWCAD6jTa0Zy7HMREtmJj/CK4 vBbwyiuiVZz3Q== From: Jisheng Zhang To: Paul Walmsley , Palmer Dabbelt , Albert Ou Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Conor Dooley Subject: [PATCH 3/3] riscv: mm: mark noncoherent_supported as __ro_after_init Date: Thu, 15 Jun 2023 00:55:04 +0800 Message-Id: <20230614165504.532-4-jszhang@kernel.org> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230614165504.532-1-jszhang@kernel.org> References: <20230614165504.532-1-jszhang@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230614_100631_164655_8616632F X-CRM114-Status: UNSURE ( 9.62 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org The noncoherent_supported indicates whether the HW is coherent or not, it won't change after booting, mark it as __ro_after_init. Signed-off-by: Jisheng Zhang Reviewed-by: Conor Dooley --- arch/riscv/mm/dma-noncoherent.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/riscv/mm/dma-noncoherent.c b/arch/riscv/mm/dma-noncoherent.c index d919efab6eba..d51a75864e53 100644 --- a/arch/riscv/mm/dma-noncoherent.c +++ b/arch/riscv/mm/dma-noncoherent.c @@ -10,7 +10,7 @@ #include #include -static bool noncoherent_supported; +static bool noncoherent_supported __ro_after_init; void arch_sync_dma_for_device(phys_addr_t paddr, size_t size, enum dma_data_direction dir)