From mboxrd@z Thu Jan 1 00:00:00 1970 From: Krzysztof Kozlowski Subject: [RESEND PATCH v2 3/9] ntb: intel: Constify ioreadX() iomem argument (as in generic implementation) Date: Wed, 19 Feb 2020 18:50:01 +0100 Message-ID: <20200219175007.13627-4-krzk__19575.0136555702$1582134707$gmane$org@kernel.org> References: <20200219175007.13627-1-krzk@kernel.org> Return-path: Received: from mail.kernel.org ([198.145.29.99]:50816 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726539AbgBSRvh (ORCPT ); Wed, 19 Feb 2020 12:51:37 -0500 In-Reply-To: <20200219175007.13627-1-krzk@kernel.org> Sender: linux-arch-owner@vger.kernel.org List-ID: 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 Cc: Krzysztof Kozlowski 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. 2. Add Dave's ack. --- 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; -- 2.17.1