[lkml]   [1998]   [Jul]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: Bug in ioremap: boundary case is wrong

    On Sun, 26 Jul 1998, Alan Cox wrote:

    > The x86 ioremap starts with
    > if(phys_addr < virt_to_phys(high_memory))
    > return phys_to_virt(phys_addr);
    > If you vremap an area whose end point is over the high_memory point your
    > memory mapping breaks. [...]

    this case is sick anyway, what does it mean to have a single mapping going
    across the end of memory? We should rather do:

    if(phys_addr < virt_to_phys(high_memory)) {
    if (phys_addr+size > high_memory)
    return phys_to_virt(phys_addr);

    -- mingo

    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    Please read the FAQ at

     \ /
      Last update: 2005-03-22 13:43    [W:0.019 / U:0.480 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site