Andrew Morton wrote:

quoted

+	for_each_possible_cpu(cpu) {
+		rbdp = per_cpu(rcu_boost_dat, cpu);
+		for (i = 0; i < RCU_BOOST_ELEMENTS; i++) {
+			rbdp[i].rbs_mutex = SPIN_LOCK_UNLOCKED;

Doesn't this confound lockdep?   We're supposed to use spin_lock_init().

Andy, can we have a checkpatch rule for SPIN_LOCK_UNLOCKED please?  It's
basically always wrong.

ERROR: Use of SPIN_LOCK_UNLOCKED is deprecated: see
Documentation/spinlocks.txt
#58: FILE: Z17.c:55:
+       rbdp[i].rbs_mutex = SPIN_LOCK_UNLOCKED;

Also picks up the RW_LOCK_UNLOCKED version too.

-apw