Return the highest priority waiter on a futex
struct futex_q * futex_top_waiter(struct futex_hash_bucket * hb, union futex_key * key);
hb
the hash bucket the futex_q's reside in
key
the futex key (to distinguish it from other futex futex_q's)
Must be called with the hb lock held.
Rusty Russell <[email protected]>
Author.