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Mon, 05 Oct 2026 02:33:06 -0700 (PDT) From: Yiwei Lin To: Andrew Morton , Peter Zijlstra Cc: Yiwei Lin , Ingo Molnar , Juri Lelli , Vincent Guittot , Davidlohr Bueso , Jon Maloy , netdev@vger.kernel.org, Jonathan Corbet , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 1/4] rbtree_test: use rb_add() and rb_add_cached() for the basic tests Date: Mon, 5 Oct 2026 17:32:33 +0800 Message-Id: <20261005093236.62702-2-s921975628@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20261005093236.62702-1-s921975628@gmail.com> References: <20261005093236.62702-1-s921975628@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit insert() and insert_cached() open-code exactly what the generic rb_add() and rb_add_cached() helpers do. Use the helpers instead. Besides removing duplicated code, this makes rbtree_test cover the helpers themselves, which is what most in-tree rbtree users call nowadays. Signed-off-by: Yiwei Lin Assisted-by: LLM --- lib/rbtree_test.c | 37 ++++++++----------------------------- 1 file changed, 8 insertions(+), 29 deletions(-) diff --git a/lib/rbtree_test.c b/lib/rbtree_test.c index 768c5e6453f37..c1386d328cfb1 100644 --- a/lib/rbtree_test.c +++ b/lib/rbtree_test.c @@ -30,41 +30,20 @@ static struct test_node *nodes = NULL; static struct rnd_state rnd; -static void insert(struct test_node *node, struct rb_root_cached *root) +static inline bool less(struct rb_node *a, const struct rb_node *b) { - struct rb_node **new = &root->rb_root.rb_node, *parent = NULL; - u32 key = node->key; - - while (*new) { - parent = *new; - if (key < rb_entry(parent, struct test_node, rb)->key) - new = &parent->rb_left; - else - new = &parent->rb_right; - } + return rb_entry(a, struct test_node, rb)->key < + rb_entry(b, struct test_node, rb)->key; +} - rb_link_node(&node->rb, parent, new); - rb_insert_color(&node->rb, &root->rb_root); +static void insert(struct test_node *node, struct rb_root_cached *root) +{ + rb_add(&node->rb, &root->rb_root, less); } static void insert_cached(struct test_node *node, struct rb_root_cached *root) { - struct rb_node **new = &root->rb_root.rb_node, *parent = NULL; - u32 key = node->key; - bool leftmost = true; - - while (*new) { - parent = *new; - if (key < rb_entry(parent, struct test_node, rb)->key) - new = &parent->rb_left; - else { - new = &parent->rb_right; - leftmost = false; - } - } - - rb_link_node(&node->rb, parent, new); - rb_insert_color_cached(&node->rb, root, leftmost); + rb_add_cached(&node->rb, root, less); } static inline void erase(struct test_node *node, struct rb_root_cached *root) -- 2.34.1