From nobody Mon Nov 25 23:48:36 2024 Received: from dggsgout11.his.huawei.com (dggsgout11.his.huawei.com [45.249.212.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1E18B1E00BE; Thu, 24 Oct 2024 13:22:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.51 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729776182; cv=none; b=QB7PQro2UhsGVcFRyvxyIPWH//x38ctLxHCJSify9hs65EGyunuZjhstGp5HE1VupazST6HnrpUuGM04lEdnYQ7+LE+N1m4dGg1lmnTplIyUw35rxo989klWtFUHvI+0m4p6mqI8kVABXdR0oQj6DIWnYG4aXGvkpxvkuAIHZgA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729776182; c=relaxed/simple; bh=K15QmUllidiKHjx67YroLVQovfDjxuq272evyjwHcnI=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=SOIZYHRj4F0LSkT/Xd6GVs7mwP5BPKCWJcR0HKYoDyElBo08KIl14kLd1B4uTd5VDY/jvLn/OkwqcwmMqswYmUH0J73iAPjb2ZUYvg/X+UCehlWnvnnPgV31RWJ+Jnj42qnIjqxN+WUJ4Ts6ps58VSP1EMkrNMDAZ7+JXXtOMo8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com; spf=pass smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=45.249.212.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.19.163.216]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4XZ66D47R5z4f3kp7; Thu, 24 Oct 2024 21:22:44 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.128]) by mail.maildlp.com (Postfix) with ESMTP id E7FA51A0194; Thu, 24 Oct 2024 21:22:56 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.104.67]) by APP4 (Coremail) with SMTP id gCh0CgCHusYpShpn7tb6Ew--.444S6; Thu, 24 Oct 2024 21:22:56 +0800 (CST) From: Yu Kuai To: stable@vger.kernel.org, gregkh@linuxfoundation.org, harry.wentland@amd.com, sunpeng.li@amd.com, Rodrigo.Siqueira@amd.com, alexander.deucher@amd.com, christian.koenig@amd.com, Xinhui.Pan@amd.com, airlied@gmail.com, daniel@ffwll.ch, viro@zeniv.linux.org.uk, brauner@kernel.org, Liam.Howlett@oracle.com, akpm@linux-foundation.org, hughd@google.com, willy@infradead.org, sashal@kernel.org, srinivasan.shanmugam@amd.com, chiahsuan.chung@amd.com, mingo@kernel.org, mgorman@techsingularity.net, yukuai3@huawei.com, chengming.zhou@linux.dev, zhangpeng.00@bytedance.com, chuck.lever@oracle.com Cc: amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, maple-tree@lists.infradead.org, linux-mm@kvack.org, yukuai1@huaweicloud.com, yi.zhang@huawei.com, yangerkun@huawei.com Subject: [PATCH 6.6 02/28] maple_tree: introduce {mtree,mas}_lock_nested() Date: Thu, 24 Oct 2024 21:19:43 +0800 Message-Id: <20241024132009.2267260-3-yukuai1@huaweicloud.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20241024132009.2267260-1-yukuai1@huaweicloud.com> References: <20241024132009.2267260-1-yukuai1@huaweicloud.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: gCh0CgCHusYpShpn7tb6Ew--.444S6 X-Coremail-Antispam: 1UD129KBjvJXoWxAFW8GryrKF1xCF4UXw1fWFg_yoW5XrWxpF yDWrZxJF1xXr1xu3yvk3Wj9FW7Xw4UWF1Ut3sFqr18ZFWUKwsagws29FW3Zr1vvFsrKFs8 GF1jg39ak398Zr7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUmI14x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_Jryl82xGYIkIc2 x26xkF7I0E14v26ryj6s0DM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2z4x0 Y4vE2Ix0cI8IcVAFwI0_Ar0_tr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJw A2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oVCq3wAS 0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2 IY67AKxVWUGVWUXwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0 Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x02628vn2kIc2 xKxwCY1x0262kKe7AKxVWrXVW3AwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWU JVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67 kF1VAFwI0_Wrv_Gr1UMIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_JFI_Gr1lIxAI cVC0I7IYx2IY6xkF7I0E14v26r4UJVWxJr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMI IF0xvEx4A2jsIE14v26r4j6F4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr1j6F4UJbIYCTnI WIevJa73UjIFyTuYvjTRC2NtUUUUU X-CM-SenderInfo: 51xn3trlr6x35dzhxuhorxvhhfrp/ Content-Type: text/plain; charset="utf-8" From: Peng Zhang commit b2472efe4316b2687c153919c1513a098bd82c17 upstream. In some cases, nested locks may be needed, so {mtree,mas}_lock_nested is introduced. For example, when duplicating maple tree, we need to hold the locks of two trees, in which case nested locks are needed. At the same time, add the definition of spin_lock_nested() in tools for testing. Link: https://lkml.kernel.org/r/20231027033845.90608-3-zhangpeng.00@bytedan= ce.com Signed-off-by: Peng Zhang Reviewed-by: Liam R. Howlett Cc: Christian Brauner Cc: Jonathan Corbet Cc: Mateusz Guzik Cc: Mathieu Desnoyers Cc: Matthew Wilcox Cc: Michael S. Tsirkin Cc: Mike Christie Cc: Nicholas Piggin Cc: Peter Zijlstra Cc: Suren Baghdasaryan Signed-off-by: Andrew Morton Signed-off-by: Yu Kuai --- include/linux/maple_tree.h | 4 ++++ tools/include/linux/spinlock.h | 1 + 2 files changed, 5 insertions(+) diff --git a/include/linux/maple_tree.h b/include/linux/maple_tree.h index d01e850b570f..f91dbc7fe091 100644 --- a/include/linux/maple_tree.h +++ b/include/linux/maple_tree.h @@ -256,6 +256,8 @@ struct maple_tree { struct maple_tree name =3D MTREE_INIT(name, 0) =20 #define mtree_lock(mt) spin_lock((&(mt)->ma_lock)) +#define mtree_lock_nested(mas, subclass) \ + spin_lock_nested((&(mt)->ma_lock), subclass) #define mtree_unlock(mt) spin_unlock((&(mt)->ma_lock)) =20 /* @@ -406,6 +408,8 @@ struct ma_wr_state { }; =20 #define mas_lock(mas) spin_lock(&((mas)->tree->ma_lock)) +#define mas_lock_nested(mas, subclass) \ + spin_lock_nested(&((mas)->tree->ma_lock), subclass) #define mas_unlock(mas) spin_unlock(&((mas)->tree->ma_lock)) =20 =20 diff --git a/tools/include/linux/spinlock.h b/tools/include/linux/spinlock.h index 622266b197d0..a6cdf25b6b9d 100644 --- a/tools/include/linux/spinlock.h +++ b/tools/include/linux/spinlock.h @@ -11,6 +11,7 @@ #define spin_lock_init(x) pthread_mutex_init(x, NULL) =20 #define spin_lock(x) pthread_mutex_lock(x) +#define spin_lock_nested(x, subclass) pthread_mutex_lock(x) #define spin_unlock(x) pthread_mutex_unlock(x) #define spin_lock_bh(x) pthread_mutex_lock(x) #define spin_unlock_bh(x) pthread_mutex_unlock(x) --=20 2.39.2