On Wed, 2012-06-06 at 09:18 -0700, tip-bot for Shai Fultheim wrote: > [ I absolutely hate these locking patterns ... yet I have no better idea. Maybe the gents on Cc: ... ] > Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> Oh yuck, this is vile.. static struct static_key scale_mp_trainwreck = STATIC_KEY_INIT_FALSE; static DEFINE_SPINLOCK(_cpa_lock); static inline void cpa_lock(void) { if (static_key_false(&scale_mp_trainwreck)) return; spin_lock(&_cpa_lock); } static inline void cpa_unlock(void) { if (static_key_false(&scale_mp_trainwreck)) return; spin_lock(&_cpa_lock); } And then use cpa_{,un}lock(), and the scale-mp guys can static_key_slow_inc(&scale_mp_trainwreck). [ and yes I hate those jump_label names ... but I'm not wanting to go through another round of bike-shed painting. ] -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html