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From
SubjectRe: 2.2.2 kernel is out
Date
Followup to:  <Pine.LNX.4.05.9902232346280.10520-100000@laser.random>
By author: Andrea Arcangeli <andrea@e-mind.com>
In newsgroup: linux.dev.kernel
>
> The only _unluky_ thing :( is that my first fix (the one in 2.2.2) has
> still a little window for a similar race again in down_interruptible() and
> down_trylock(), and I should have fixed it completly only in the last
> days. You can find my patch against 2.2.2-pre5 (or 2.2.2) on the list. The
> new patch is quite simple and the race won't have the time impact somebody
> in the meantime but it's still not perfect (even if closer). Excuse me.
>
> So I suggest all no-x86 arch developers to apply my latest semaphore patch
> before starting fixing semaphores.
>
> Also I don't know if it worth to move the semaphore-helper.h to
> include/linux. Doing that (using the spinlock everywhere) and so following
> the x86 semaphore implementation, it would be semi-trivial for no-x86
> maintainers to fix their trees without having to think (too much ;) about
> the races.
>

I guess it might have been preferrable to make a prepatch, ALERT all
the non-x86 arch maintainers, and give them a day or two to cough up
the patches? Obviously a timeout is necessary, but it'd make sense, I
believe.

-hpa
--
"Linux is a very complete and sophisticated operating system. There
are, and will be, large numbers of applications available for it."
-- Paul Maritz, Group Vice President for Platforms And Applications,
Microsoft Corporation [Reference at: http://www.kernel.org/~hpa/ms.html]

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