diff options
| -rw-r--r-- | sys/kern/subr_witness.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sys/kern/subr_witness.c b/sys/kern/subr_witness.c index 53fbb96..ec98ba0 100644 --- a/sys/kern/subr_witness.c +++ b/sys/kern/subr_witness.c @@ -474,6 +474,11 @@ witness_lock(struct lock_object *lock, int flags, const char *file, int line) td = curthread; if (class->lc_flags & LC_SLEEPLOCK) { + /* + * Since spin locks include a critical section, this check + * impliclty enforces a lock order of all sleep locks before + * all spin locks. + */ if (td->td_critnest != 0 && (flags & LOP_TRYLOCK) == 0) panic("blockable sleep lock (%s) %s @ %s:%d", class->lc_name, lock->lo_name, file, line); |
