From patchwork Tue Jan 7 16:52:58 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 61015 Received: from vger.kernel.org ([209.132.180.67]) by www.linuxtv.org with esmtp (Exim 4.92) (envelope-from ) id 1ios6D-00GVER-4Z; Tue, 07 Jan 2020 16:52:57 +0000 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728482AbgAGQxk (ORCPT + 1 other); Tue, 7 Jan 2020 11:53:40 -0500 Received: from mail.kernel.org ([198.145.29.99]:40244 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728386AbgAGQxk (ORCPT ); Tue, 7 Jan 2020 11:53:40 -0500 Received: from PC-kkoz.proceq.com (unknown [213.160.61.66]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id AA79D222D9; Tue, 7 Jan 2020 16:53:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578416018; bh=PNN7dlJTmEky+NUaaDTzRSu4j6j/ysVCFrpoVxYBApA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QRU7+8aH01DNd/5WdDLDp7Pbj60ipcsUgpLo+cZ8VajAsfo0Qt4VKM1JujozBqIWl PD+jRlIZn3zE1Vtrsv6uBO54zPRMt8wf0ceqLBjexJiGttZEEvsbe7LzFEiIBPNV76 pazcEjfjZTeBefPXrZ9ULjqekbqneHZyMwsgOJHM= 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 , Andrew Morton , Thomas Gleixner , Geert Uytterhoeven , 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 Cc: Krzysztof Kozlowski Subject: [RFT 01/13] iomap: Constify ioreadX() iomem argument (as in generic implementation) Date: Tue, 7 Jan 2020 17:52:58 +0100 Message-Id: <1578415992-24054-2-git-send-email-krzk@kernel.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1578415992-24054-1-git-send-email-krzk@kernel.org> References: <1578415992-24054-1-git-send-email-krzk@kernel.org> Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@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. Suggested-by: Geert Uytterhoeven Signed-off-by: Krzysztof Kozlowski --- include/asm-generic/iomap.h | 22 +++++++++++----------- include/linux/io-64-nonatomic-hi-lo.h | 4 ++-- include/linux/io-64-nonatomic-lo-hi.h | 4 ++-- lib/iomap.c | 18 +++++++++--------- 4 files changed, 24 insertions(+), 24 deletions(-) diff --git a/include/asm-generic/iomap.h b/include/asm-generic/iomap.h index 9d28a5e82f73..986e894bef49 100644 --- a/include/asm-generic/iomap.h +++ b/include/asm-generic/iomap.h @@ -26,14 +26,14 @@ * in the low address range. Architectures for which this is not * true can't use this generic implementation. */ -extern unsigned int ioread8(void __iomem *); -extern unsigned int ioread16(void __iomem *); -extern unsigned int ioread16be(void __iomem *); -extern unsigned int ioread32(void __iomem *); -extern unsigned int ioread32be(void __iomem *); +extern unsigned int ioread8(const void __iomem *); +extern unsigned int ioread16(const void __iomem *); +extern unsigned int ioread16be(const void __iomem *); +extern unsigned int ioread32(const void __iomem *); +extern unsigned int ioread32be(const void __iomem *); #ifdef CONFIG_64BIT -extern u64 ioread64(void __iomem *); -extern u64 ioread64be(void __iomem *); +extern u64 ioread64(const void __iomem *); +extern u64 ioread64be(const void __iomem *); #endif #ifdef readq @@ -41,10 +41,10 @@ extern u64 ioread64be(void __iomem *); #define ioread64_hi_lo ioread64_hi_lo #define ioread64be_lo_hi ioread64be_lo_hi #define ioread64be_hi_lo ioread64be_hi_lo -extern u64 ioread64_lo_hi(void __iomem *addr); -extern u64 ioread64_hi_lo(void __iomem *addr); -extern u64 ioread64be_lo_hi(void __iomem *addr); -extern u64 ioread64be_hi_lo(void __iomem *addr); +extern u64 ioread64_lo_hi(const void __iomem *addr); +extern u64 ioread64_hi_lo(const void __iomem *addr); +extern u64 ioread64be_lo_hi(const void __iomem *addr); +extern u64 ioread64be_hi_lo(const void __iomem *addr); #endif extern void iowrite8(u8, void __iomem *); diff --git a/include/linux/io-64-nonatomic-hi-lo.h b/include/linux/io-64-nonatomic-hi-lo.h index ae21b72cce85..f32522bb3aa5 100644 --- a/include/linux/io-64-nonatomic-hi-lo.h +++ b/include/linux/io-64-nonatomic-hi-lo.h @@ -57,7 +57,7 @@ static inline void hi_lo_writeq_relaxed(__u64 val, volatile void __iomem *addr) #ifndef ioread64_hi_lo #define ioread64_hi_lo ioread64_hi_lo -static inline u64 ioread64_hi_lo(void __iomem *addr) +static inline u64 ioread64_hi_lo(const void __iomem *addr) { u32 low, high; @@ -79,7 +79,7 @@ static inline void iowrite64_hi_lo(u64 val, void __iomem *addr) #ifndef ioread64be_hi_lo #define ioread64be_hi_lo ioread64be_hi_lo -static inline u64 ioread64be_hi_lo(void __iomem *addr) +static inline u64 ioread64be_hi_lo(const void __iomem *addr) { u32 low, high; diff --git a/include/linux/io-64-nonatomic-lo-hi.h b/include/linux/io-64-nonatomic-lo-hi.h index faaa842dbdb9..448a21435dba 100644 --- a/include/linux/io-64-nonatomic-lo-hi.h +++ b/include/linux/io-64-nonatomic-lo-hi.h @@ -57,7 +57,7 @@ static inline void lo_hi_writeq_relaxed(__u64 val, volatile void __iomem *addr) #ifndef ioread64_lo_hi #define ioread64_lo_hi ioread64_lo_hi -static inline u64 ioread64_lo_hi(void __iomem *addr) +static inline u64 ioread64_lo_hi(const void __iomem *addr) { u32 low, high; @@ -79,7 +79,7 @@ static inline void iowrite64_lo_hi(u64 val, void __iomem *addr) #ifndef ioread64be_lo_hi #define ioread64be_lo_hi ioread64be_lo_hi -static inline u64 ioread64be_lo_hi(void __iomem *addr) +static inline u64 ioread64be_lo_hi(const void __iomem *addr) { u32 low, high; diff --git a/lib/iomap.c b/lib/iomap.c index e909ab71e995..3b10c0ab2cee 100644 --- a/lib/iomap.c +++ b/lib/iomap.c @@ -70,27 +70,27 @@ static void bad_io_access(unsigned long port, const char *access) #define mmio_read64be(addr) swab64(readq(addr)) #endif -unsigned int ioread8(void __iomem *addr) +unsigned int ioread8(const void __iomem *addr) { IO_COND(addr, return inb(port), return readb(addr)); return 0xff; } -unsigned int ioread16(void __iomem *addr) +unsigned int ioread16(const void __iomem *addr) { IO_COND(addr, return inw(port), return readw(addr)); return 0xffff; } -unsigned int ioread16be(void __iomem *addr) +unsigned int ioread16be(const void __iomem *addr) { IO_COND(addr, return pio_read16be(port), return mmio_read16be(addr)); return 0xffff; } -unsigned int ioread32(void __iomem *addr) +unsigned int ioread32(const void __iomem *addr) { IO_COND(addr, return inl(port), return readl(addr)); return 0xffffffff; } -unsigned int ioread32be(void __iomem *addr) +unsigned int ioread32be(const void __iomem *addr) { IO_COND(addr, return pio_read32be(port), return mmio_read32be(addr)); return 0xffffffff; @@ -142,26 +142,26 @@ static u64 pio_read64be_hi_lo(unsigned long port) return lo | (hi << 32); } -u64 ioread64_lo_hi(void __iomem *addr) +u64 ioread64_lo_hi(const void __iomem *addr) { IO_COND(addr, return pio_read64_lo_hi(port), return readq(addr)); return 0xffffffffffffffffULL; } -u64 ioread64_hi_lo(void __iomem *addr) +u64 ioread64_hi_lo(const void __iomem *addr) { IO_COND(addr, return pio_read64_hi_lo(port), return readq(addr)); return 0xffffffffffffffffULL; } -u64 ioread64be_lo_hi(void __iomem *addr) +u64 ioread64be_lo_hi(const void __iomem *addr) { IO_COND(addr, return pio_read64be_lo_hi(port), return mmio_read64be(addr)); return 0xffffffffffffffffULL; } -u64 ioread64be_hi_lo(void __iomem *addr) +u64 ioread64be_hi_lo(const void __iomem *addr) { IO_COND(addr, return pio_read64be_hi_lo(port), return mmio_read64be(addr));