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    SubjectRe: [PATCH 2.6.25.10 1/2] libata: fix locking for kmap_atomic
    On Sun, 13 Jul 2008 01:27:36 +0200 "Jakub W. Jozwicki" <jozwicki@aster.pl> wrote:

    > Change locking surrounding kmap_atomic from local_irqsave to
    > local_irqsave_nort. This fixes issues with PREEMPT_RT.
    >

    I assume this is a -rt kernel patch.

    >
    > --- linux-2.6.25.10/drivers/ata/libata-core.c 2008-07-03 05:46:47.000000000
    > +0200
    > +++ linux-2.6.25.10-rt7/drivers/ata/libata-core.c 2008-07-12
    > 23:59:33.132140258 +0200
    > @@ -5157,14 +5157,14 @@
    > unsigned long flags;
    >
    > /* FIXME: use a bounce buffer */
    > - local_irq_save(flags);
    > + local_irq_save_nort(flags);

    eww. If we're going to have to do stuff like this in mainline then
    there might be a revolt.



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