• Dave Hansen's avatar
    [PATCH] kill off highmem_start_page · 422e43d4
    Dave Hansen authored
    People love to do comparisons with highmem_start_page.  However, where
    CONFIG_HIGHMEM=y and there is no actual highmem, there's no real page at
    *highmem_start_page.
    
    That's usually not a problem, but CONFIG_NONLINEAR is a bit more strict and
    catches the bogus address tranlations. 
    
    There are about a gillion different ways to find out of a 'struct page' is
    highmem or not.  Why not just check page_flags?  Just use PageHighMem()
    wherever there used to be a highmem_start_page comparison.  Then, kill off
    highmem_start_page.
    
    This removes more code than it adds, and gets rid of some nasty
    #ifdefs in .c files.
    Signed-off-by: default avatarDave Hansen <haveblue@us.ibm.com>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    422e43d4
mem.c 7.79 KB