From: Andreas Larsson <[email protected]> Date: Wed, 5 Nov 2014 15:52:08 +0100
> Atomicity between xchg and cmpxchg cannot be guaranteed when xchg is > implemented with a swap and cmpxchg is implemented with locks. > Without this, e.g. mcs_spin_lock and mcs_spin_unlock are broken. > > Signed-off-by: Andreas Larsson <[email protected]> Unfortunate, but obviously necessary. Applied and queued up for -stable, thanks! -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
