On Thu, Sep 21, 2023 at 07:04:23PM +0800, Baoquan He wrote: > 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@xxxxxxxxxx> > Acked-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> > Acked-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx> (powerpc) > Acked-by: Helge Deller <deller@xxxxxx> # parisc > Cc: linux-alpha@xxxxxxxxxxxxxxx > Cc: linux-hexagon@xxxxxxxxxxxxxxx > Cc: linux-m68k@xxxxxxxxxxxxxxxxxxxx > Cc: linux-mips@xxxxxxxxxxxxxxx > Cc: linux-parisc@xxxxxxxxxxxxxxx > Cc: linuxppc-dev@xxxxxxxxxxxxxxxx > Cc: linux-sh@xxxxxxxxxxxxxxx > Cc: sparclinux@xxxxxxxxxxxxxxx > --- > Documentation/driver-api/device-io.rst | 9 +++++---- > arch/alpha/include/asm/io.h | 1 - > arch/hexagon/include/asm/io.h | 3 --- > arch/m68k/include/asm/kmap.h | 1 - > arch/mips/include/asm/io.h | 1 - Acked-by: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx> -- Crap can work. Given enough thrust pigs will fly, but it's not necessarily a good idea. [ RFC1925, 2.3 ]
