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Bottomley" , Helge Deller , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Naveen N Rao , Yoshinori Sato , Rich Felker , John Paul Adrian Glaubitz , Julian Vetter , Bjorn Helgaas , linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-sh@vger.kernel.org Subject: [PATCH 4/6] powerpc: asm/io.h: remove split ioread64/iowrite64 helpers Date: Sat, 15 Mar 2025 11:59:05 +0100 Message-Id: <20250315105907.1275012-5-arnd@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250315105907.1275012-1-arnd@kernel.org> References: <20250315105907.1275012-1-arnd@kernel.org> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Arnd Bergmann In previous kernels, there were conflicting definitions for what ioread64_lo_hi() and similar functions were supposed to do on architectures with native 64-bit MMIO. Based on the actual usage in drivers, they are in fact expected to be a pair of 32-bit accesses on all architectures, which makes the powerpc64 definition wrong. Remove it and use the generic implementation instead. Drivers that want to have split lo/hi or hi/lo accesses on 32-bit architectures but can use 64-bit accesses where supported should instead use ioread64()/iowrite64() after including the corresponding header file. Signed-off-by: Arnd Bergmann --- arch/powerpc/include/asm/io.h | 48 ----------------------------------- 1 file changed, 48 deletions(-) diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h index fd92ac450169..d36c4ccaca08 100644 --- a/arch/powerpc/include/asm/io.h +++ b/arch/powerpc/include/asm/io.h @@ -738,35 +738,11 @@ static inline unsigned int ioread32be(const void __iomem *addr) #define ioread32be ioread32be #ifdef __powerpc64__ -static inline u64 ioread64_lo_hi(const void __iomem *addr) -{ - return readq(addr); -} -#define ioread64_lo_hi ioread64_lo_hi - -static inline u64 ioread64_hi_lo(const void __iomem *addr) -{ - return readq(addr); -} -#define ioread64_hi_lo ioread64_hi_lo - static inline u64 ioread64be(const void __iomem *addr) { return readq_be(addr); } #define ioread64be ioread64be - -static inline u64 ioread64be_lo_hi(const void __iomem *addr) -{ - return readq_be(addr); -} -#define ioread64be_lo_hi ioread64be_lo_hi - -static inline u64 ioread64be_hi_lo(const void __iomem *addr) -{ - return readq_be(addr); -} -#define ioread64be_hi_lo ioread64be_hi_lo #endif /* __powerpc64__ */ static inline void iowrite16be(u16 val, void __iomem *addr) @@ -782,35 +758,11 @@ static inline void iowrite32be(u32 val, void __iomem *addr) #define iowrite32be iowrite32be #ifdef __powerpc64__ -static inline void iowrite64_lo_hi(u64 val, void __iomem *addr) -{ - writeq(val, addr); -} -#define iowrite64_lo_hi iowrite64_lo_hi - -static inline void iowrite64_hi_lo(u64 val, void __iomem *addr) -{ - writeq(val, addr); -} -#define iowrite64_hi_lo iowrite64_hi_lo - static inline void iowrite64be(u64 val, void __iomem *addr) { writeq_be(val, addr); } #define iowrite64be iowrite64be - -static inline void iowrite64be_lo_hi(u64 val, void __iomem *addr) -{ - writeq_be(val, addr); -} -#define iowrite64be_lo_hi iowrite64be_lo_hi - -static inline void iowrite64be_hi_lo(u64 val, void __iomem *addr) -{ - writeq_be(val, addr); -} -#define iowrite64be_hi_lo iowrite64be_hi_lo #endif /* __powerpc64__ */ struct pci_dev; -- 2.39.5