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    SubjectRE: highmem deadlock fix [was Re: VM in 2.4.10(+tweaks) vs. 2.4.9 -ac14/15(+stuff)]
    Date


    > -----Original Message-----
    > From: Andrea Arcangeli [mailto:andrea@suse.de]
    > Sent: Thursday, September 27, 2001 5:13 PM
    > To: Macaulay, Robert
    > Cc: Rik van Riel; Craig Kulesa; linux-kernel@vger.kernel.org; Bob
    > Matthews; Marcelo Tosatti; Linus Torvalds
    > Subject: highmem deadlock fix [was Re: VM in 2.4.10(+tweaks) vs.
    > 2.4.9-ac14/15(+stuff)]
    >
    > @@ -2519,7 +2521,9 @@
    > int tryagain = 1;
    >
    > do {
    > - if (buffer_dirty(p) || buffer_locked(p)) {
    > + if (unlikely(buffer_pending_IO(p)))
    > + tryagain = 0;
    > + else if (buffer_dirty(p) || buffer_locked(p)) {
    > if (test_and_set_bit(BH_Wait_IO, &p->b_state)) {
    > if (buffer_dirty(p)) {
    > ll_rw_block(WRITE, 1, &p);
    >

    Im getting an undefined reference to the unlikely function in this patch.
    -
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