Re: [PATCH] bug in 2.4 bh_kmap_irq() breaks IDE under preempt patch

Alan Cox (alan@lxorguk.ukuu.org.uk)
12 Mar 2003 23:27:28 +0000

On Wed, 2003-03-12 at 22:13, Joe Korty wrote:
> The bug is that bh_map_irq *conditionally* calls kmap_atomic (which
> disables preemption as one of its functions), while bh_unmap_irq
> *unconditionally* calls kunmap_atomic (which enables it). This

Thats a pre-empt bug ont a bh_map_irq bug. I'm glad you've found it
however. It explains a few things and will be useful for people wanting
pre-empt 2.4 .

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