linux-kernel - [PATCH v4 4/4] mips: io: remove duplicated codes

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Date:   Wed,  8 Mar 2023 21:07:10 +0800
From:   Baoquan He <bhe@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-arch@...r.kernel.org, linux-mm@...ck.org, arnd@...db.de,
        mpe@...erman.id.au, geert@...ux-m68k.org, mcgrof@...nel.org,
        hch@...radead.org, Baoquan He <bhe@...hat.com>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Helge Deller <deller@....de>,
        Serge Semin <fancer.lancer@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Huacai Chen <chenhuacai@...nel.org>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        linux-mips@...r.kernel.org
Subject: [PATCH v4 4/4] mips: io: remove duplicated codes

By adding asm-generic/io.h support, there are some duplicated function
implementation, like phys_to_virt, memset_io, memcpy_(from|to)io.
Let's remove them to use the default version in asm-neneric/io.h.

Meanwhile move isa_bus_to_virt() down below <asm-generic/io.h> including
line to fix the compiling error of missing phys_to_virt definition.

Signed-off-by: Baoquan He <bhe@...hat.com>
Cc: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc: Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: Helge Deller <deller@....de>
Cc: Serge Semin <fancer.lancer@...il.com>
Cc: Florian Fainelli <f.fainelli@...il.com>
Cc: Huacai Chen <chenhuacai@...nel.org>
Cc: Jiaxun Yang <jiaxun.yang@...goat.com>
Cc: linux-mips@...r.kernel.org
---
 arch/mips/include/asm/io.h | 45 +++++---------------------------------
 1 file changed, 5 insertions(+), 40 deletions(-)

diff --git a/arch/mips/include/asm/io.h b/arch/mips/include/asm/io.h
index da0a625c3c6d..1b38f02bc608 100644
--- a/arch/mips/include/asm/io.h
+++ b/arch/mips/include/asm/io.h
@@ -114,24 +114,6 @@ static inline phys_addr_t virt_to_phys(const volatile void *x)
 	return __virt_to_phys(x);
 }
 
-/*
- *     phys_to_virt    -       map physical address to virtual
- *     @address: address to remap
- *
- *     The returned virtual address is a current CPU mapping for
- *     the memory address given. It is only valid to use this function on
- *     addresses that have a kernel mapping
- *
- *     This function does not handle bus mappings for DMA transfers. In
- *     almost all conceivable cases a device driver should not be using
- *     this function
- */
-#define phys_to_virt phys_to_virt
-static inline void * phys_to_virt(unsigned long address)
-{
-	return __va(address);
-}
-
 /*
  * ISA I/O bus memory addresses are 1:1 with the physical address.
  */
@@ -140,11 +122,6 @@ static inline unsigned long isa_virt_to_bus(volatile void *address)
 	return virt_to_phys(address);
 }
 
-static inline void *isa_bus_to_virt(unsigned long address)
-{
-	return phys_to_virt(address);
-}
-
 /*
  * Change "struct page" to physical address.
  */
@@ -535,23 +512,6 @@ BUILDSTRING(q, u64)
 #define writesq writesq
 #endif
 
-
-#define memset_io memset_io
-static inline void memset_io(volatile void __iomem *addr, unsigned char val, int count)
-{
-	memset((void __force *) addr, val, count);
-}
-#define memcpy_fromio memcpy_fromio
-static inline void memcpy_fromio(void *dst, const volatile void __iomem *src, int count)
-{
-	memcpy(dst, (void __force *) src, count);
-}
-#define memcpy_toio memcpy_toio
-static inline void memcpy_toio(volatile void __iomem *dst, const void *src, int count)
-{
-	memcpy((void __force *) dst, src, count);
-}
-
 /*
  * The caches on some architectures aren't dma-coherent and have need to
  * handle this in software.  There are three types of operations that
@@ -617,4 +577,9 @@ void __ioread64_copy(void *to, const void __iomem *from, size_t count);
 
 #include <asm-generic/io.h>
 
+static inline void *isa_bus_to_virt(unsigned long address)
+{
+	return phys_to_virt(address);
+}
+
 #endif /* _ASM_IO_H */
-- 
2.34.1