Function gbincore_unlocked

freebsd/kern/vfs_subr.c:2436–2446

* Look up a buf using the buffer tries, without the bufobj lock. This relies * on SMR for safe lookup, and bufs being in a no-free zone to provide type * stability of the result. Like other lockless lookups, the found buf may * already be invalid by the time this function returns. */

 * already be invalid by the time this function returns.
 */
struct buf *
gbincore_unlocked(struct bufobj *bo, daddr_t lblkno)
{
	struct buf *bp;

	ASSERT_BO_UNLOCKED(bo);
	bp = BUF_PCTRIE_LOOKUP_UNLOCKED(&bo->bo_clean.bv_root, lblkno);
	if (bp != NULL)
		return (bp);
	return (BUF_PCTRIE_LOOKUP_UNLOCKED(&bo->bo_dirty.bv_root, lblkno));
}

/*
 * Associate a buffer with a vnode.