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026246f114
ioremap_uc() is only meaningful on old x86-32 systems with the PAT extension, and on ia64 with its slightly unconventional ioremap() behavior. So remove the ioremap_uc() definition in architecutures other than x86 and ia64. These architectures all have asm-generic/io.h included and will have the default ioremap_uc() definition which returns NULL. This changes the existing behaviour, while no need to worry about any breakage because in the only callsite of ioremap_uc(), code has been adjusted to eliminate the impact. Please see atyfb_setup_generic() of drivers/video/fbdev/aty/atyfb_base.c. If any new invocation of ioremap_uc() need be added, please consider using ioremap() intead or adding a ARCH specific version if necessary. Signed-off-by: Baoquan He <bhe@redhat.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Acked-by: Helge Deller <deller@gmx.de> # parisc Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Acked-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> (SuperH) Cc: linux-alpha@vger.kernel.org Cc: linux-hexagon@vger.kernel.org Cc: linux-m68k@lists.linux-m68k.org Cc: linux-mips@vger.kernel.org Cc: linux-parisc@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-sh@vger.kernel.org Cc: sparclinux@vger.kernel.org Signed-off-by: Arnd Bergmann <arnd@arndb.de>
69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _KMAP_H
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#define _KMAP_H
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#ifdef CONFIG_MMU
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/* Values for nocacheflag and cmode */
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#define IOMAP_FULL_CACHING 0
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#define IOMAP_NOCACHE_SER 1
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#define IOMAP_NOCACHE_NONSER 2
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#define IOMAP_WRITETHROUGH 3
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/*
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* These functions exported by arch/m68k/mm/kmap.c.
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* Only needed on MMU enabled systems.
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*/
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extern void __iomem *__ioremap(unsigned long physaddr, unsigned long size,
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int cacheflag);
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#define iounmap iounmap
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extern void iounmap(void __iomem *addr);
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#define ioremap ioremap
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static inline void __iomem *ioremap(unsigned long physaddr, unsigned long size)
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{
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return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
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}
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#define ioremap_wt ioremap_wt
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static inline void __iomem *ioremap_wt(unsigned long physaddr,
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unsigned long size)
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{
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return __ioremap(physaddr, size, IOMAP_WRITETHROUGH);
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}
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#define memset_io memset_io
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static inline void memset_io(volatile void __iomem *addr, unsigned char val,
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int count)
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{
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__builtin_memset((void __force *) addr, val, count);
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}
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#define memcpy_fromio memcpy_fromio
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static inline void memcpy_fromio(void *dst, const volatile void __iomem *src,
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int count)
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{
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__builtin_memcpy(dst, (void __force *) src, count);
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}
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#define memcpy_toio memcpy_toio
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static inline void memcpy_toio(volatile void __iomem *dst, const void *src,
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int count)
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{
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__builtin_memcpy((void __force *) dst, src, count);
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}
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#endif /* CONFIG_MMU */
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#define ioport_map ioport_map
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static inline void __iomem *ioport_map(unsigned long port, unsigned int nr)
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{
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return (void __iomem *) port;
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}
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#define ioport_unmap ioport_unmap
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static inline void ioport_unmap(void __iomem *p)
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{
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}
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#endif /* _KMAP_H */
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