Re: x86 rwsem in 2.4.4pre[234] are still buggy [was Re: rwsembenchmarks [Re: generic rwsem [Re: Alpha "process table hang"]]]

[Linus Torvalds]

On Sat, 21 Apr 2001, Russell King wrote:
>
> Erm, spin_lock()?  What if up_read or up_write gets called from interrupt
> context (is this allowed)?

Currently that is not allowed.

We allow it for regular semaphores, but not for rw-semaphores.

We may some day have to revisit that issue, but I suspect we won't have
much reason to.

                Linus

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