On Wed, 8 Jun 2011, Peter Zijlstra wrote: > On Wed, 2011-06-08 at 12:27 -0700, Linus Torvalds wrote: > > Make some kind of > > > > void atomic_down(); > > int atomic_down_trylock(); > > void atomic_up(); > > atomic_down() is a tad iffy, it would have to wait for an actual > semaphore owner, which might sleep etc.. So I skipped it. > > The other two are implemented here, and assume IRQs are disabled, we > could add _irq and _irqsave versions of both, but since there are no > users I avoided the effort. > > --- > include/linux/semaphore.h | 3 +++ > kernel/semaphore.c | 36 +++++++++++++++++++++++++++++++++++- Can we please confine this to kernel/printk.c ? I can see the creative abuse of this already. Thanks, tglx -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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