• Arjan van dev Ven's avatar
    fix historic ioremap() abuse in AGP · fcea424d
    Arjan van dev Ven authored
    Several AGP drivers right now use ioremap_nocache() on kernel ram in order
    to turn a page of regular memory uncached.
    
    There are two problems with this:
    
        1) This is a total nightmare for the ioremap() implementation to keep
           various mappings of the same page coherent.
    
        2) It's a total nightmare for the AGP code since it adds a ton of
           complexity in terms of keeping track of 2 different pointers to
           the same thing, in terms of error handling etc etc.
    
    This patch fixes this by making the AGP drivers use the new
    set_memory_XX APIs instead.
    
    Note: amd-k7-agp.c is built on Alpha too, and generic.c is built
    on ia64 as well, which do not yet have the set_memory_*() APIs,
    so for them some we have a few ugly #ifdefs - hopefully they'll
    be fixed soon.
    Signed-off-by: default avatarArjan van de Ven <arjan@linux.intel.com>
    Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
    Signed-off-by: default avatarDave Airlie <airlied@linux.ie>
    fcea424d
ioremap.c 11.5 KB