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d=linuxfoundation.org; s=korg; t=1681287228; bh=bwGFO+6I4Gkh7d44vzEgly0I4VhqYvnKlmGD6UXFvLY=; h=Subject:To:Cc:From:Date:In-Reply-To:From; b=M32effEfwqryXRmrVkGUavLnKNgNTAoR5L85Ea3zdoh8pbQNtZx5KOg8x+0H8pOhO hH7PmlXt1mBeElLi6nNP5bQxt9zfbR5OQJFCXbKTlSuXw3xiFrsNwN8Aa2VWnFrwao L4GfuaAJsu89vv7Lxol8xmjQJYMdG1AnNUHDNs3E= Subject: Patch "maple_tree: remove extra smp_wmb() from mas_dead_leaves()" has been added to the 6.1-stable tree To: Liam.Howlett@Oracle.com,Liam.Howlett@oracle.com,gregkh@linuxfoundation.org,linux-mm@kvack.org,maple-tree@lists.infradead.org Cc: From: Date: Wed, 12 Apr 2023 10:13:29 +0200 In-Reply-To: <20230411151055.2910579-12-Liam.Howlett@oracle.com> Message-ID: <2023041228-magnetic-phonics-4912@gregkh> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit X-stable: commit X-Patchwork-Hint: ignore X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: C318A8000F X-Stat-Signature: ocwj75jys5ti7upmhs34g65q1jhcm45h X-HE-Tag: 1681287229-131450 X-HE-Meta: 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 3ltKMIps 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: This is a note to let you know that I've just added the patch titled maple_tree: remove extra smp_wmb() from mas_dead_leaves() to the 6.1-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: maple_tree-remove-extra-smp_wmb-from-mas_dead_leaves.patch and it can be found in the queue-6.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >From stable-owner@vger.kernel.org Tue Apr 11 17:13:37 2023 From: "Liam R. Howlett" Date: Tue, 11 Apr 2023 11:10:52 -0400 Subject: maple_tree: remove extra smp_wmb() from mas_dead_leaves() To: Greg Kroah-Hartman , stable@vger.kernel.org Cc: maple-tree@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Liam R. Howlett" , Liam Howlett Message-ID: <20230411151055.2910579-12-Liam.Howlett@oracle.com> From: "Liam R. Howlett" commit 8372f4d83f96f35915106093cde4565836587123 upstream. The call to mte_set_dead_node() before the smp_wmb() already calls smp_wmb() so this is not needed. This is an optimization for the RCU mode of the maple tree. Link: https://lkml.kernel.org/r/20230227173632.3292573-5-surenb@google.com Fixes: 54a611b60590 ("Maple Tree: add new data structure") Cc: stable@vger.kernel.org Signed-off-by: Liam Howlett Signed-off-by: Greg Kroah-Hartman --- lib/maple_tree.c | 1 - 1 file changed, 1 deletion(-) --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -5495,7 +5495,6 @@ unsigned char mas_dead_leaves(struct ma_ break; mte_set_node_dead(entry); - smp_wmb(); /* Needed for RCU */ node->type = type; rcu_assign_pointer(slots[offset], node); } Patches currently in stable-queue which might be from stable-owner@vger.kernel.org are queue-6.1/maple_tree-fix-potential-rcu-issue.patch queue-6.1/maple_tree-add-smp_rmb-to-dead-node-detection.patch queue-6.1/maple_tree-add-rcu-lock-checking-to-rcu-callback-functions.patch queue-6.1/maple_tree-fix-handle-of-invalidated-state-in-mas_wr_store_setup.patch queue-6.1/maple_tree-reduce-user-error-potential.patch queue-6.1/maple_tree-fix-mas_prev-and-mas_find-state-handling.patch queue-6.1/maple_tree-remove-gfp_zero-from-kmem_cache_alloc-and-kmem_cache_alloc_bulk.patch queue-6.1/maple_tree-be-more-cautious-about-dead-nodes.patch queue-6.1/mm-enable-maple-tree-rcu-mode-by-default.patch queue-6.1/maple_tree-detect-dead-nodes-in-mas_start.patch queue-6.1/maple_tree-fix-freeing-of-nodes-in-rcu-mode.patch queue-6.1/maple_tree-remove-extra-smp_wmb-from-mas_dead_leaves.patch queue-6.1/maple_tree-refine-ma_state-init-from-mas_start.patch