lkml.org 
[lkml]   [2006]   [Jan]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH 3 of 3] Add __raw_memcpy_toio32 to each arch
    "Bryan O'Sullivan" <bos@pathscale.com> wrote:
    >
    > Most arches use the generic routine. x86_64 uses memcpy32 instead;
    > this is substantially faster, even over a bus that is much slower than
    > the CPU.
    >
    > Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
    >
    > diff -r 1052904816d7 -r ee6ce7e55dc7 arch/x86_64/lib/io.c
    > --- a/arch/x86_64/lib/io.c Wed Jan 11 14:35:45 2006 -0800
    > +++ b/arch/x86_64/lib/io.c Wed Jan 11 14:35:45 2006 -0800
    > @@ -21,3 +21,9 @@
    > memset((void *)a,b,c);
    > }
    > EXPORT_SYMBOL(memset_io);
    > +
    > +/* override generic definition in lib/raw_memcpy_io.c */
    > +void __raw_memcpy_toio32(void __iomem *to, const void *from, size_t count)
    > +{
    > + memcpy32((void __force *) to, from, count);
    > +}
    > diff -r 1052904816d7 -r ee6ce7e55dc7 include/asm-alpha/io.h
    > --- a/include/asm-alpha/io.h Wed Jan 11 14:35:45 2006 -0800
    > +++ b/include/asm-alpha/io.h Wed Jan 11 14:35:45 2006 -0800
    > @@ -504,6 +504,8 @@
    > extern void memcpy_toio(volatile void __iomem *, const void *, long);
    > extern void _memset_c_io(volatile void __iomem *, unsigned long, long);
    >
    > +void __raw_memcpy_toio32(void __iomem *to, const void *from, size_t count);
    > +

    <etc>

    How's about we add a new linux/io.h which does:

    #include <asm/io.h>
    void __raw_memcpy_toio32(void __iomem *to, const void *from, size_t count);

    ?
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2006-01-12 00:49    [W:0.045 / U:390.424 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site