diff options
| -rw-r--r-- | Documentation/driver-api/device-io.rst | 9 | ||||
| -rw-r--r-- | arch/alpha/include/asm/io.h | 1 | ||||
| -rw-r--r-- | arch/hexagon/include/asm/io.h | 3 | ||||
| -rw-r--r-- | arch/m68k/include/asm/kmap.h | 1 | ||||
| -rw-r--r-- | arch/mips/include/asm/io.h | 1 | ||||
| -rw-r--r-- | arch/parisc/include/asm/io.h | 2 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/io.h | 1 | ||||
| -rw-r--r-- | arch/sh/include/asm/io.h | 2 | ||||
| -rw-r--r-- | arch/sparc/include/asm/io_64.h | 1 |
9 files changed, 5 insertions, 16 deletions
diff --git a/Documentation/driver-api/device-io.rst b/Documentation/driver-api/device-io.rst index 2c7abd234f4e..d55384b106bd 100644 --- a/Documentation/driver-api/device-io.rst +++ b/Documentation/driver-api/device-io.rst @@ -408,11 +408,12 @@ functions for details on the CPU side of things. ioremap_uc() ------------ -ioremap_uc() behaves like ioremap() except that on the x86 architecture without -'PAT' mode, it marks memory as uncached even when the MTRR has designated -it as cacheable, see Documentation/arch/x86/pat.rst. +ioremap_uc() is only meaningful on old x86-32 systems with the PAT extension, +and on ia64 with its slightly unconventional ioremap() behavior, everywhere +elss ioremap_uc() defaults to return NULL. -Portable drivers should avoid the use of ioremap_uc(). + +Portable drivers should avoid the use of ioremap_uc(), use ioremap() instead. ioremap_cache() --------------- diff --git a/arch/alpha/include/asm/io.h b/arch/alpha/include/asm/io.h index 7aeaf7c30a6f..076f0e4e7f1e 100644 --- a/arch/alpha/include/asm/io.h +++ b/arch/alpha/include/asm/io.h @@ -308,7 +308,6 @@ static inline void __iomem *ioremap(unsigned long port, unsigned long size) } #define ioremap_wc ioremap -#define ioremap_uc ioremap static inline void iounmap(volatile void __iomem *addr) { diff --git a/arch/hexagon/include/asm/io.h b/arch/hexagon/include/asm/io.h index e2b308e32a37..b7bc246dbcb1 100644 --- a/arch/hexagon/include/asm/io.h +++ b/arch/hexagon/include/asm/io.h @@ -174,9 +174,6 @@ static inline void writel(u32 data, volatile void __iomem *addr) #define _PAGE_IOREMAP (_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \ (__HEXAGON_C_DEV << 6)) -#define ioremap_uc(addr, size) ioremap((addr), (size)) - - #define __raw_writel writel static inline void memcpy_fromio(void *dst, const volatile void __iomem *src, diff --git a/arch/m68k/include/asm/kmap.h b/arch/m68k/include/asm/kmap.h index 4efb3efa593a..b778f015c917 100644 --- a/arch/m68k/include/asm/kmap.h +++ b/arch/m68k/include/asm/kmap.h @@ -25,7 +25,6 @@ static inline void __iomem *ioremap(unsigned long physaddr, unsigned long size) return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); } -#define ioremap_uc ioremap #define ioremap_wt ioremap_wt static inline void __iomem *ioremap_wt(unsigned long physaddr, unsigned long size) diff --git a/arch/mips/include/asm/io.h b/arch/mips/include/asm/io.h index 41d8bd5adef8..1ecf255efb40 100644 --- a/arch/mips/include/asm/io.h +++ b/arch/mips/include/asm/io.h @@ -170,7 +170,6 @@ void iounmap(const volatile void __iomem *addr); */ #define ioremap(offset, size) \ ioremap_prot((offset), (size), _CACHE_UNCACHED) -#define ioremap_uc ioremap /* * ioremap_cache - map bus memory into CPU space diff --git a/arch/parisc/include/asm/io.h b/arch/parisc/include/asm/io.h index 366537042465..48630c78714a 100644 --- a/arch/parisc/include/asm/io.h +++ b/arch/parisc/include/asm/io.h @@ -132,8 +132,6 @@ static inline void gsc_writeq(unsigned long long val, unsigned long addr) #define ioremap_wc(addr, size) \ ioremap_prot((addr), (size), _PAGE_IOREMAP) -#define ioremap_uc(addr, size) \ - ioremap_prot((addr), (size), _PAGE_IOREMAP) #define pci_iounmap pci_iounmap diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h index 5220274a6277..bc624a84531d 100644 --- a/arch/powerpc/include/asm/io.h +++ b/arch/powerpc/include/asm/io.h @@ -900,7 +900,6 @@ void __iomem *ioremap_wt(phys_addr_t address, unsigned long size); #endif void __iomem *ioremap_coherent(phys_addr_t address, unsigned long size); -#define ioremap_uc(addr, size) ioremap((addr), (size)) #define ioremap_cache(addr, size) \ ioremap_prot((addr), (size), pgprot_val(PAGE_KERNEL)) diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h index ac521f287fa5..d0b4e0765654 100644 --- a/arch/sh/include/asm/io.h +++ b/arch/sh/include/asm/io.h @@ -302,8 +302,6 @@ unsigned long long poke_real_address_q(unsigned long long addr, ioremap_prot((addr), (size), pgprot_val(PAGE_KERNEL)) #endif /* CONFIG_MMU */ -#define ioremap_uc ioremap - /* * Convert a physical pointer to a virtual kernel pointer for /dev/mem * access diff --git a/arch/sparc/include/asm/io_64.h b/arch/sparc/include/asm/io_64.h index 9303270b22f3..d8ee1442f303 100644 --- a/arch/sparc/include/asm/io_64.h +++ b/arch/sparc/include/asm/io_64.h @@ -423,7 +423,6 @@ static inline void __iomem *ioremap(unsigned long offset, unsigned long size) return (void __iomem *)offset; } -#define ioremap_uc(X,Y) ioremap((X),(Y)) #define ioremap_wc(X,Y) ioremap((X),(Y)) #define ioremap_wt(X,Y) ioremap((X),(Y)) static inline void __iomem *ioremap_np(unsigned long offset, unsigned long size) |