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[73.104.62.181]) by smtp.gmail.com with ESMTPSA id 956f58d0204a3-660d5f86e2csm11127434d50.5.2026.06.09.10.15.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 09 Jun 2026 10:15:46 -0700 (PDT) From: Yury Norov X-Google-Original-From: Yury Norov To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Felix Maurer , Sebastian Andrzej Siewior , Kexin Sun , Yury Norov , Quan Sun <2022090917019@std.uestc.edu.cn>, Luka Gejak , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] net: hsr: simplify fill_last_seq_nrs() Date: Tue, 9 Jun 2026 13:15:44 -0400 Message-ID: <20260609171545.1051322-1-ynorov@nvidia.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The function checks the HSR_PT_SLAVE_A and HSR_PT_SLAVE_B bitmaps for emptiness right before calling find_last_bit(). This pass may be avoided, because if the bitmap is empty, the find_last_bit() returns >= HSR_SEQ_BLOCK_SIZE Signed-off-by: Yury Norov --- net/hsr/hsr_framereg.c | 16 ++++++---------- 1 file changed, 6 insertions(+), 10 deletions(-) diff --git a/net/hsr/hsr_framereg.c b/net/hsr/hsr_framereg.c index 124619920d38..bf143b86999b 100644 --- a/net/hsr/hsr_framereg.c +++ b/net/hsr/hsr_framereg.c @@ -827,18 +827,14 @@ static void fill_last_seq_nrs(struct hsr_node *node, u16 *if1_seq, u16 *if2_seq) block_sz = hsr_seq_block_size(node); block = node->block_buf + block_off * block_sz; - if (!bitmap_empty(block->seq_nrs[HSR_PT_SLAVE_B - 1], - HSR_SEQ_BLOCK_SIZE)) { - seq_bit = find_last_bit(block->seq_nrs[HSR_PT_SLAVE_B - 1], - HSR_SEQ_BLOCK_SIZE); + seq_bit = find_last_bit(block->seq_nrs[HSR_PT_SLAVE_B - 1], HSR_SEQ_BLOCK_SIZE); + if (seq_bit < HSR_SEQ_BLOCK_SIZE) *if1_seq = (block->block_idx << HSR_SEQ_BLOCK_SHIFT) | seq_bit; - } - if (!bitmap_empty(block->seq_nrs[HSR_PT_SLAVE_A - 1], - HSR_SEQ_BLOCK_SIZE)) { - seq_bit = find_last_bit(block->seq_nrs[HSR_PT_SLAVE_A - 1], - HSR_SEQ_BLOCK_SIZE); + + seq_bit = find_last_bit(block->seq_nrs[HSR_PT_SLAVE_A - 1], HSR_SEQ_BLOCK_SIZE); + if (seq_bit < HSR_SEQ_BLOCK_SIZE) *if2_seq = (block->block_idx << HSR_SEQ_BLOCK_SHIFT) | seq_bit; - } + spin_unlock_bh(&node->seq_out_lock); } -- 2.53.0