Re: x86 rwsem in 2.4.4pre[234] are still buggy [was Re: rwsem

Linus Torvalds (torvalds@transmeta.com)
Sat, 21 Apr 2001 10:18:06 -0700 (PDT)

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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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