From patchwork Wed Jan 8 20:05:22 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 11324477 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 90BAD1580 for ; Wed, 8 Jan 2020 20:06:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6FDBC2082E for ; Wed, 8 Jan 2020 20:06:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578513984; bh=7WvpgXtbKaASLJmny49byk2BAQpG0TKX5P0WxQ0MehA=; h=From:To:Subject:Date:In-Reply-To:References:List-ID:From; b=Jg3U8he8qGovfP+SxGzrBBjlnfwoGANb/WGQDcZJ0Q+aXhsy8rNItdDjZh+W09FUA FLS/6LzpLVnPEnT1X0bDnvSY/t1dr5BTzEXVm5wcQ8/WCvDQzPZliZCyMSHWxUAwQH tIPj0970bJxEKVTNXJmy9LbRKpt3XD9qU6vrgEpk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727053AbgAHUGR (ORCPT ); Wed, 8 Jan 2020 15:06:17 -0500 Received: from mail.kernel.org ([198.145.29.99]:59286 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725835AbgAHUGP (ORCPT ); Wed, 8 Jan 2020 15:06:15 -0500 Received: from localhost.localdomain (unknown [83.218.167.187]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A25EE2072A; Wed, 8 Jan 2020 20:06:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578513974; bh=7WvpgXtbKaASLJmny49byk2BAQpG0TKX5P0WxQ0MehA=; h=From:To:Subject:Date:In-Reply-To:References:From; b=PY+oqH9cwJtxC08CiGcYoOkgsuI2NSHiP77prbq2gYqP2xSGczGXIgEMTc/owkVIN vhNFskU2UiqY1/W/YV36+LG4BmVnSUnil/ubLCY4oaijqC6ilW7CTqS70Urax38QKs BFMv93uAqjblGY8osoaDNGPj76OXCck3behyHCR4= From: Krzysztof Kozlowski To: Richard Henderson , Ivan Kokshaysky , Matt Turner , Alexey Brodkin , Vineet Gupta , "James E.J. Bottomley" , Helge Deller , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Yoshinori Sato , Rich Felker , Dave Airlie , David Airlie , Daniel Vetter , Ben Skeggs , Mauro Carvalho Chehab , Jiri Slaby , Nick Kossifidis , Luis Chamberlain , Kalle Valo , "David S. Miller" , Dave Jiang , Jon Mason , Allen Hubbe , "Michael S. Tsirkin" , Jason Wang , Arnd Bergmann , Krzysztof Kozlowski , Geert Uytterhoeven , Thomas Gleixner , linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-sh@vger.kernel.org, dri-devel@lists.freedesktop.org, nouveau@lists.freedesktop.org, linux-media@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-ntb@googlegroups.com, virtualization@lists.linux-foundation.org, linux-arch@vger.kernel.org Subject: [PATCH v2 3/9] ntb: intel: Constify ioreadX() iomem argument (as in generic implementation) Date: Wed, 8 Jan 2020 21:05:22 +0100 Message-Id: <20200108200528.4614-4-krzk@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200108200528.4614-1-krzk@kernel.org> References: <20200108200528.4614-1-krzk@kernel.org> Sender: linux-parisc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org The ioreadX() helpers have inconsistent interface. On some architectures void *__iomem address argument is a pointer to const, on some not. Implementations of ioreadX() do not modify the memory under the address so they can be converted to a "const" version for const-safety and consistency among architectures. Signed-off-by: Krzysztof Kozlowski Reviewed-by: Geert Uytterhoeven Acked-by: Dave Jiang --- Changes since v1: 1. Add Geert's review. --- drivers/ntb/hw/intel/ntb_hw_gen1.c | 2 +- drivers/ntb/hw/intel/ntb_hw_gen3.h | 2 +- drivers/ntb/hw/intel/ntb_hw_intel.h | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/ntb/hw/intel/ntb_hw_gen1.c b/drivers/ntb/hw/intel/ntb_hw_gen1.c index bb57ec239029..9202502a9787 100644 --- a/drivers/ntb/hw/intel/ntb_hw_gen1.c +++ b/drivers/ntb/hw/intel/ntb_hw_gen1.c @@ -1202,7 +1202,7 @@ int intel_ntb_peer_spad_write(struct ntb_dev *ntb, int pidx, int sidx, ndev->peer_reg->spad); } -static u64 xeon_db_ioread(void __iomem *mmio) +static u64 xeon_db_ioread(const void __iomem *mmio) { return (u64)ioread16(mmio); } diff --git a/drivers/ntb/hw/intel/ntb_hw_gen3.h b/drivers/ntb/hw/intel/ntb_hw_gen3.h index 75fb86ca27bb..d1455f24ec99 100644 --- a/drivers/ntb/hw/intel/ntb_hw_gen3.h +++ b/drivers/ntb/hw/intel/ntb_hw_gen3.h @@ -91,7 +91,7 @@ #define GEN3_DB_TOTAL_SHIFT 33 #define GEN3_SPAD_COUNT 16 -static inline u64 gen3_db_ioread(void __iomem *mmio) +static inline u64 gen3_db_ioread(const void __iomem *mmio) { return ioread64(mmio); } diff --git a/drivers/ntb/hw/intel/ntb_hw_intel.h b/drivers/ntb/hw/intel/ntb_hw_intel.h index e071e28bca3f..3c0a5a2da241 100644 --- a/drivers/ntb/hw/intel/ntb_hw_intel.h +++ b/drivers/ntb/hw/intel/ntb_hw_intel.h @@ -102,7 +102,7 @@ struct intel_ntb_dev; struct intel_ntb_reg { int (*poll_link)(struct intel_ntb_dev *ndev); int (*link_is_up)(struct intel_ntb_dev *ndev); - u64 (*db_ioread)(void __iomem *mmio); + u64 (*db_ioread)(const void __iomem *mmio); void (*db_iowrite)(u64 db_bits, void __iomem *mmio); unsigned long ntb_ctl; resource_size_t db_size;