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d=linuxfoundation.org; s=korg; t=1681287157; bh=ZVLtk05QZb3/68EPqshIV8BqfLScwfSTzkHderHn3+Q=; h=Subject:To:Cc:From:Date:In-Reply-To:From; b=hDlte4Rf975Ty0NYpdWiBedFgkAwA6HwuhimgLvf4gQKwPCGUvhS6lnJHGyqAz6RK J6EbmO9Mh2L8XY01sLuFyBMqLRMAY7ABAYNtQ7mGLt+DQPY3sbmMmfc2yPpvqKkHHE Zylp4k3g3fE5+ZO72UOZiVLRLS7UVEe0uCRuR9kY= Subject: Patch "maple_tree: remove extra smp_wmb() from mas_dead_leaves()" has been added to the 6.2-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 10:12:10 +0200 In-Reply-To: <20230411151055.2910579-12-Liam.Howlett@oracle.com> Message-ID: <2023041210-economic-thirsting-9129@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-Rspamd-Queue-Id: CF68A4001C X-Stat-Signature: 9eis14fnquiw8xxdrpokh1s1s654bmyc X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1681287158-132265 X-HE-Meta: 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 bOjIDjQM 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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 6.2-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-6.2 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 @@ -5500,7 +5500,6 @@ 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-6.2/maple_tree-fix-potential-rcu-issue.patch queue-6.2/maple_tree-add-smp_rmb-to-dead-node-detection.patch queue-6.2/maple_tree-add-rcu-lock-checking-to-rcu-callback-functions.patch queue-6.2/maple_tree-fix-handle-of-invalidated-state-in-mas_wr_store_setup.patch queue-6.2/maple_tree-reduce-user-error-potential.patch queue-6.2/maple_tree-fix-mas_prev-and-mas_find-state-handling.patch queue-6.2/maple_tree-remove-gfp_zero-from-kmem_cache_alloc-and-kmem_cache_alloc_bulk.patch queue-6.2/maple_tree-be-more-cautious-about-dead-nodes.patch queue-6.2/mm-enable-maple-tree-rcu-mode-by-default.patch queue-6.2/maple_tree-detect-dead-nodes-in-mas_start.patch queue-6.2/maple_tree-fix-freeing-of-nodes-in-rcu-mode.patch queue-6.2/maple_tree-remove-extra-smp_wmb-from-mas_dead_leaves.patch queue-6.2/maple_tree-refine-ma_state-init-from-mas_start.patch