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FromArnd Bergmann <>
SubjectRe: [PATCH 3/8] ppc64: add a watchdog driver for rtas
DateWed, 18 May 2005 16:39:51 +0200
On Middeweken 18 Mai 2005 16:45, Nathan Lynch wrote:
> > > A semaphore would also be the wrong approach since we don't want
> > processes to block but instead to fail opening the watchdog twice.> > I should have been more explicit.  What I had in mind was using
> down_trylock and returning -EBUSY if it failed.

Well, that's also pointless. If the only operations you ever do
on a semaphore are down_trylock() and up(), you end up using
only the atomic variable in there while wasting a few bytes of
extra memory for storing the wait queue head ;-)

	Arnd <><
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