kernel/bpf/ringbuf.c

319 	cons_pos = smp_load_acquire(&rb->consumer_pos);
322 		over_pos = smp_load_acquire(&rb->overwrite_pos);
323 		prod_pos = smp_load_acquire(&rb->producer_pos);
326 		prod_pos = smp_load_acquire(&rb->producer_pos);
476 	cons_pos = smp_load_acquire(&rb->consumer_pos);
521 		 * after smp_load_acquire(r->producer_pos), the overwrite_pos
532 	/* pairs with consumer's smp_load_acquire() */
579 	cons_pos = smp_load_acquire(&rb->consumer_pos) & rb->mask;
653 		return smp_load_acquire(&rb->consumer_pos);
655 		return smp_load_acquire(&rb->producer_pos);
657 		return smp_load_acquire(&rb->overwrite_pos);
755 	prod_pos = smp_load_acquire(&rb->producer_pos);
760 	cons_pos = smp_load_acquire(&rb->consumer_pos);
766 	hdr_len = smp_load_acquire(hdr);
808 	/* Using smp_load_acquire() is unnecessary here, as the busy-bit
810 	 * by this task with smp_load_acquire() in __bpf_user_ringbuf_peek().
813 	 /* Synchronizes with smp_load_acquire() in user-space producer. */