On Mon, Sep 05, 2016 at 10:43:11AM +0100, Will Deacon wrote: > On Sat, Sep 03, 2016 at 12:16:29AM +0200, Peter Zijlstra wrote: > > Forgot to Cc Will. Will, does ARM64 need to make smp_mb__before_spinlock > > smp_mb() too? > > Yes, probably. Just to confirm, the test is something like: > > > CPU0 > ---- > > Wx=1 > smp_mb__before_spinlock() > LOCK(y) > Rz=0 > > CPU1 > ---- > > Wz=1 > smp_mb() > Rx=0 > > > and that should be forbidden? Indeed. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
