Messages in this thread | | | From | Arnd Bergmann <> | Subject | Re: [PATCH 3/8] ppc64: add a watchdog driver for rtas | Date | Wed, 18 May 2005 16:39:51 +0200 |
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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 ;-)
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