On Wed, May 09, 2007 at 12:29:27AM +0200, Nick Piggin wrote:
> On Tue, May 08, 2007 at 09:06:32AM -0600, Matthew Wilcox wrote:
> > On Tue, May 08, 2007 at 01:37:09PM +0200, Nick Piggin wrote:
> > > --
> > > Introduce test_and_set_bit_lock / clear_bit_unlock bitops with lock semantics.
> > > Add non-trivial for powerpc and ia64. Convert page lock, buffer lock,
> > > bit_spin_lock, tasklet locks to use the new locks.
> >
> > The names are a bit clumsy. How about naming them after the effect,
> > rather than the implementation? It struck me that really these things
> > are bit mutexes -- you can sleep while holding the lock. How about
> > calling them bit_mutex_trylock() and bit_mutex_unlock()?
>
> bit_spin_trylock / bit_spin_unlock be OK? ;)
We already have a bit_spin_trylock -- it keeps preempt disabled until
you bit_spin_unlock. Oh, and it only actually sets a bit if you've got
SMP or lock debugging on. Nice try though ;-)
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