On Wed, Jul 31, 2013 at 09:19:13PM +0100, Andrei E. Warkentin wrote: > Hiya, > > I've noticed the AArch64 arch_spin_unlock is implemented with the > 'stlr' instruction. > > Shouldn't that be followed by a 'sev'? No. In ARMv8, When the exclusive is cleared for a processor, an event is generated. Will