On Mon, 24 Nov 2014, Daniel Thompson wrote: > I did want to remove the lock too. However when I reviewed this code I > concluded the lock was still required. Without it I think it is possible > for gic_raise_softirq() to raise an IPI on the old core *after* the code > to migrate pending IPIs has been run.
And I bet it took you quite some time to figure that out from that overly documented abuse of irq_controller_lock. See my other reply. Thanks, tglx -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/