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authorBaoquan He <bhe@redhat.com>2023-09-21 14:04:23 +0300
committerArnd Bergmann <arnd@arndb.de>2023-11-23 12:32:52 +0300
commit026246f114d925b2ab97a60e8b4a5506bd035e9c (patch)
tree82aa56239047ff7599e10032876ff6481fc45560 /arch/sh
parent4bfb53e7d317c01f296b2feb2fae7c421c1d52dc (diff)
downloadlinux-026246f114d925b2ab97a60e8b4a5506bd035e9c.tar.xz
arch/*/io.h: remove ioremap_uc in some architectures
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>
Diffstat (limited to 'arch/sh')
-rw-r--r--arch/sh/include/asm/io.h2
1 files changed, 0 insertions, 2 deletions
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