Christian Ehrhardt wrote:
Really need that smp_mb__after_clear_bit ? AFAIK test_and_clear_bit
implies a barrier?
Well I agree that practically test_and_clear_bit has a barrier on
s390, but as far as I read Documentation/atomic_ops.txt at line
339-360 I think the interface does not imply it so I wanted to add it
explicitly. I would be happy if someone really knows the in depth
details here and corrects me :-)
IIUC rmw bitops are full memory barriers. The non-rmw (from the
caller's perspective), clear_bit() and set_bit(), are not.
--
error compiling committee.c: too many arguments to function
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