• Linus Torvalds's avatar
    get_user_pages: don't try to follow PFNMAP pages · 1ff80389
    Linus Torvalds authored
    Nick Piggin points out that a few drivers play games with VM_IO (why?
    who knows..) and thus a pfn-remapped area may not have that bit set even
    if remap_pfn_range() set it originally.
    
    So make it explicit in get_user_pages() that we don't follow VM_PFNMAP
    pages, since pretty much by definition they do not have a "struct page"
    associated with them.
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    1ff80389
memory.c 64 KB