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Howlett (Oracle)" To: Andrew Morton Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, maple-tree@lists.infradead.org, "Liam R. Howlett (Oracle)" Subject: [PATCH v3 08/19] maple_tree: Use prefetched value in mas_wr_store_type() Date: Fri, 21 Aug 2026 15:26:16 -0400 Message-ID: <20260821192627.4085470-9-liam@infradead.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260821192627.4085470-1-liam@infradead.org> References: <20260821192627.4085470-1-liam@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Stat-Signature: kojjsxi1twgu67wxooofkqaamjgfkxo3 X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: D1A4620009 X-HE-Tag: 1787340413-833062 X-HE-Meta: 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 pomJo8II oJ/DCrJQ0X/4FMMsyelv8AO7KSYsx9TE+idIwgFgPkyPoBya7lmuY8xcuBNTxqxhzqe6Tf9dgCqxgWsO0mQRLbuBmdusHAVunW1rnowavQU60EGgFHV+YBH5fpWLq9cZkPC64DgWOpF5b41N4QK0lq4uOIKNO6xl00fBFs0EFiS1U5ANqnbw4becCF+f2pG/CkdT8WeYxAtVRmNQFDEHoO6HIhBE4/t4IPl7nwYqAsM3RfPjkMhN/c7oEisAHFN6Ri4ZMydWrVYyEL83Iy2U8R/KJuRej3t6+HZ6qFtbgYkdGBGHxj7N5dI7QQgh/6HMleTDryiTc6pow1PJdh+4whVMTbQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: The slot contents exist in wr_mas->content, which has less overhead than reading the slot again. Signed-off-by: Liam R. Howlett (Oracle) --- lib/maple_tree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/maple_tree.c b/lib/maple_tree.c index baaaa128594c2..d5fa85bc7aab0 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -3280,7 +3280,7 @@ static inline void mas_wr_slot_store(struct ma_wr_state *wr_mas) void __rcu **slots = wr_mas->slots; bool gap = false; - gap |= !mt_slot_locked(mas->tree, slots, offset); + gap |= !wr_mas->content; gap |= !mt_slot_locked(mas->tree, slots, offset + 1); if (wr_mas->offset_end - offset == 1) { -- 2.47.3