From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E0996C43458 for ; Mon, 6 Jul 2026 06:21:20 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 70ACC6B00D9; Mon, 6 Jul 2026 02:20:44 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 6E2076B00DB; Mon, 6 Jul 2026 02:20:44 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 55B906B00DC; Mon, 6 Jul 2026 02:20:44 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 29DA06B00D9 for ; Mon, 6 Jul 2026 02:20:44 -0400 (EDT) Received: from smtpin02.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 94332402B7 for ; Mon, 6 Jul 2026 06:20:43 +0000 (UTC) X-FDA: 84957353166.02.A508602 Received: from invmail4.hynix.com (exvmail4.skhynix.com [166.125.252.92]) by imf13.hostedemail.com (Postfix) with ESMTP id 97BED20009 for ; Mon, 6 Jul 2026 06:20:41 +0000 (UTC) Authentication-Results: imf13.hostedemail.com; dkim=none; dmarc=pass (policy=none) header.from=sk.com; spf=pass (imf13.hostedemail.com: domain of byungchul@sk.com designates 166.125.252.92 as permitted sender) smtp.mailfrom=byungchul@sk.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1783318842; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:content-type: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=R4/2pM852PDcO3szkWpMNfFRg+W3nM4E1Vu9ZcLRWDk=; b=3Bl/OjRsiEgcnW9YfGF+SzKACd87ThuUf4ny5niQL/TRT2QAoJYyJSJPH4PkF0aIsZLiT7 eNaQ7UmkdlK5RBR5DkRLYqV41ZB5OGnrn6a38xEoAzxRxA47iBonjjlg2zbmwj0YFvEe7Z W9fO8mn9smytJcs1w9sKxKAE88s8XpI= ARC-Authentication-Results: i=1; imf13.hostedemail.com; dkim=none; dmarc=pass (policy=none) header.from=sk.com; spf=pass (imf13.hostedemail.com: domain of byungchul@sk.com designates 166.125.252.92 as permitted sender) smtp.mailfrom=byungchul@sk.com ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1783318842; b=Gz8HZISKBttQHi8uFwhx+eb5RHFEQp0hgmpq6Boe4boLOy/weH1JfVojuj4/SuqYnMW9bw rgleJMP3l2n5A2OcJr3ZXMHvEWJocNWoIG8mBMB4xQYHL6aMp9GLAVyBQM0upH0ypAOWLi 3vVvzULXpnGoBTtIuATM2ecZy3Zm2+M= X-AuditID: a67dfc5b-c45ff70000001609-1c-6a4b4903b9ee From: Byungchul Park To: linux-kernel@vger.kernel.org Cc: max.byungchul.park@gmail.com, kernel_team@skhynix.com, torvalds@linux-foundation.org, damien.lemoal@opensource.wdc.com, linux-ide@vger.kernel.org, adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, mingo@redhat.com, peterz@infradead.org, will@kernel.org, tglx@linutronix.de, rostedt@goodmis.org, joel@joelfernandes.org, sashal@kernel.org, daniel.vetter@ffwll.ch, duyuyang@gmail.com, johannes.berg@intel.com, tj@kernel.org, tytso@mit.edu, willy@infradead.org, david@fromorbit.com, amir73il@gmail.com, gregkh@linuxfoundation.org, kernel-team@lge.com, linux-mm@kvack.org, akpm@linux-foundation.org, mhocko@kernel.org, minchan@kernel.org, hannes@cmpxchg.org, vdavydov.dev@gmail.com, sj@kernel.org, jglisse@redhat.com, dennis@kernel.org, cl@linux.com, penberg@kernel.org, rientjes@google.com, vbabka@suse.cz, ngupta@vflare.org, linux-block@vger.kernel.org, josef@toxicpanda.com, linux-fsdevel@vger.kernel.org, jack@suse.cz, jlayton@kernel.org, dan.j.williams@intel.com, hch@infradead.org, djwong@kernel.org, dri-devel@lists.freedesktop.org, rodrigosiqueiramelo@gmail.com, melissa.srw@gmail.com, hamohammed.sa@gmail.com, harry.yoo@oracle.com, chris.p.wilson@intel.com, gwan-gyeong.mun@intel.com, boqun.feng@gmail.com, longman@redhat.com, yunseong.kim@ericsson.com, ysk@kzalloc.com, yeoreum.yun@arm.com, netdev@vger.kernel.org, matthew.brost@intel.com, her0gyugyu@gmail.com, corbet@lwn.net, catalin.marinas@arm.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, luto@kernel.org, sumit.semwal@linaro.org, gustavo@padovan.org, christian.koenig@amd.com, andi.shyti@kernel.org, arnd@arndb.de, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, rppt@kernel.org, surenb@google.com, mcgrof@kernel.org, petr.pavlu@suse.com, da.gomez@kernel.org, samitolvanen@google.com, paulmck@kernel.org, frederic@kernel.org, neeraj.upadhyay@kernel.org, joelagnelf@nvidia.com, josh@joshtriplett.org, urezki@gmail.com, mathieu.desnoyers@efficios.com, jiangshanlai@gmail.com, qiang.zhang@linux.dev, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, vschneid@redhat.com, chuck.lever@oracle.com, neil@brown.name, okorniev@redhat.com, Dai.Ngo@oracle.com, tom@talpey.com, trondmy@kernel.org, anna@kernel.org, kees@kernel.org, bigeasy@linutronix.de, clrkwllms@kernel.org, mark.rutland@arm.com, ada.coupriediaz@arm.com, kristina.martsenko@arm.com, wangkefeng.wang@huawei.com, broonie@kernel.org, kevin.brodsky@arm.com, dwmw@amazon.co.uk, shakeel.butt@linux.dev, ast@kernel.org, ziy@nvidia.com, yuzhao@google.com, baolin.wang@linux.alibaba.com, usamaarif642@gmail.com, joel.granados@kernel.org, richard.weiyang@gmail.com, geert+renesas@glider.be, tim.c.chen@linux.intel.com, linux@treblig.org, alexander.shishkin@linux.intel.com, lillian@star-ark.net, chenhuacai@kernel.org, francesco@valla.it, guoweikang.kernel@gmail.com, link@vivo.com, jpoimboe@kernel.org, masahiroy@kernel.org, brauner@kernel.org, thomas.weissschuh@linutronix.de, oleg@redhat.com, mjguzik@gmail.com, andrii@kernel.org, wangfushuai@baidu.com, linux-doc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org, linux-i2c@vger.kernel.org, linux-arch@vger.kernel.org, linux-modules@vger.kernel.org, rcu@vger.kernel.org, linux-nfs@vger.kernel.org, linux-rt-devel@lists.linux.dev, 2407018371@qq.com, dakr@kernel.org, miguel.ojeda.sandonis@gmail.com, neilb@ownmail.net, bagasdotme@gmail.com, wsa+renesas@sang-engineering.com, dave.hansen@intel.com, geert@linux-m68k.org, ojeda@kernel.org, alex.gaynor@gmail.com, gary@garyguo.net, bjorn3_gh@protonmail.com, lossin@kernel.org, a.hindborg@kernel.org, aliceryhl@google.com, tmgross@umich.edu, rust-for-linux@vger.kernel.org Subject: [PATCH v19 24/40] locking/lockdep: prevent various lockdep assertions when lockdep_off()'ed Date: Mon, 6 Jul 2026 15:19:12 +0900 Message-Id: <20260706061928.66713-25-byungchul@sk.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20260706061928.66713-1-byungchul@sk.com> References: <20260706061928.66713-1-byungchul@sk.com> X-Brightmail-Tracker: H4sIAAAAAAAAAzWSbUxTdxTG97/3f1/a0ezasXHVD5gmqCPBuUXnyeIW4mK4ypaZ+fJhGKXa m7UIhbSKssWsIJ0VRREHBOqQF9M05UVsgwixruLAF0LoVkzaorYQrJAGMR3FICC2GL+c/PI8 z3mSkxyWlPupVaxGe1TUaZW5ClqKpVMJjWl4R2bOxif1EjAZf4fHgXEKojMmDIvmLgZM9loK 3O0tCIzdSzGtsp+BmbkRBrzuv0n4v+MNDeG7EQRVo+M01EwWY5i2nEMw2ZcB467TCBarj0C4 +iUN84NDJNRUuRFEJoMInNYSGp5VdJIwHJ2m4UHVWRqm/r1MQMjvJOBU8zUauoM9DAQsIQwD FU1ErJyG6utJYK45RcTGBAEWQwqYBz0UjFnrGFhqyIf+lucMhEOVNATu/UFBlyHIgN3Xh2Bm eJQAU08UQ239YxpuOR9gMC3OIPD0XKbhaesSBQbzq9ilrgEKrj33EjDQfx/DyOAFBoZ62igY DXopaHvRRMOlFyEElug0A/+5GggovtOM01XCK+N5LNgcNwihtb4VCfOvK5FQ6jgudNc9YYTS 235GaLAfE0r/maIEhzVVaL41SQiNkSgl+MPfCHbbGVqwRyoZoXF+gtyV9rN0q0rM1RSKus+/ zZaqWxZ8VIFvxYnZJj9hQJaPyhDL8twm3mpMK0OSZTT1ldBxprl1vNc7R8Y5kVvDO8pDVBmS siTnSebPWcpx3PiYU/H9vrblEOZS+PmrD4k4y7iv+JGSKeZdaTLf0uFazkhievvCX8sZObeZ H5m+h+OlPHdFwrsfTlDvFlbyd6xeXIFkDegDG5JrtIV5Sk3upg3qIq3mxIbD+Xl2FPs4y8mF rJso4t7dizgWKRJkkL4zR04pC/VFeb2IZ0lFomzt+swcuUylLPpV1OUf1B3LFfW9aDWLFUmy L2ePq+TcL8qj4hFRLBB1712ClawyoE8+JMs3SrYmlvHnbb72/TvrMjLO3k3forYbO3+4en9P QcC+8tNocM7c2/fbvpdWjw0l/bRDr87UF6eMov2pr5+6kuUGx9o3n9VvUw9v/86pm7Nk30hy /nlo9sxFx0nl3vRw1oGusUfur4kmz3jtUPDH9houCxd2XNFWfJ9ABCRjCqxXK79IJXV65VvG SGIPbQMAAA== X-Brightmail-Tracker: H4sIAAAAAAAAAzWSWUwTcRDG/f93u12q1bWCrvoAaeIRE6gmaibxwhjDCtHok9eDNrKRcqcV EBW1xWpVUGzSEqkoVGm0oCDFA0ljUwIiXtSqgFCRpBa5xChHoEUsGF8m38z3my/zMDQheSpY QitSj/HKVHmylBKRol0bciPRjrjE1bqeMNBpz0Bnl1cAn9QOEkaGdSTcqKygYNL0RAi66usC aGrVkNDyoBxB14gOwZjfRIC2doqESX2jEIbHO4RgUCOYsjciMLr0BLS1PCegokaN4XfVHwr6 638hMHR7KSjsVZMwZMlDUOQzCaG3IQYGu+oEMOXpwdA6OoDA4v2Dweu4gGDSmAS3zLbguvEn Bf437wgoNLQgKO32EPCr9yuCmsYvCOx3NRR8K3hEgNs7Fz6MDFHw0nCZgkHXDQw/qigo0dgF 4Hrdj6DYpEfg+2zHkHu7kgJjcTUJtV+fCcHVH8DQadRjKK/eCV0WHwmvCsw4eG6QergITIW5 OFi+YzDcr8MwbrEKo8sQN6a9QnJW22PMad9PUlzFzQrE+Sf0iBsuyyU4bUGwrR8YIrhztiyu 7NUAxU2MfKQ4+2gJyTWbWe7OxQnMXXsTydUWeYS7tx4QbYznkxWZvFK2+bAooTzQLkhvn398 1PwZn0WWeZdQCM0ya1ldg4aa1hSzgm1rGyemdSgTwdryfYJLSEQTjDuczbPkk9PGAiaebWy/ PwORzDLWf6cZT2sxs57t0AwK/4WGs+VVjhkmJDh/ECieYSTMOrZj6AVZgEQlaJYVhSpSM1Pk iuR1UaqkhOxUxfGoI2kp1Sj4T5acwLWnaNgd40QMjaRzxBAdmygRyDNV2SlOxNKENFS8fGVc okQcL88+wSvTDikzknmVEy2lSekicexe/rCEOSo/xifxfDqv/O9iOmTJWZR/MnDryLy+0zhs ftJYSd76TVZ8hc36Ltvc0Fm6Xfuxx20mbFnnn2yL89S6dy683uw692xLd2xlmG9FpPOUsWjr qNP6yL+nN73uXloP3fdT2SSbnXOw+NPiWQRTE1DLbE2uiGUx+xXRUB8+eDqq9KrN0WSPWDzm cQT2ybQZbwkpqUqQr1lFKFXyv5jOPbtLAwAA X-CFilter-Loop: Reflected X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 97BED20009 X-Stat-Signature: dunzr3s4fta6a3c9swd93sky9ogc3srk X-HE-Tag: 1783318841-102655 X-HE-Meta: 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 pMZUpUCO Psu//+AU5jxv99HTmZRwccjIIdWq99lht/t3ErA/KiiZr2VPF1oOV9WqOgNiXNzk/t2coPfr6SGsPd26vGKqMNHl0cRpOuZpFd4GQ0z9oOH9OQl3RBH1ljxWiASWrShEl+OgtO3I7GQfkCHtcKhCE4HNsAeocTGXyDe4AKGvEpsAu514fABAT07ODvfcfaVUof917+AUV1BFGTlPDPLtgETcxAA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: lockdep provides APIs for assertion only if lockdep is enabled at the moment asserting to avoid unnecessary confusion, using the following condition, debug_locks && !this_cpu_read(lockdep_recursion). However, lockdep_{off,on}() are also used for disabling and enabling lockdep for a simular purpose. Add !lockdep_recursing(current) that is updated by lockdep_{off,on}() to the condition so that the assertions are aware of !__lockdep_enabled if lockdep_off()'ed. Signed-off-by: Byungchul Park --- include/linux/lockdep.h | 3 ++- kernel/locking/lockdep.c | 10 ++++++++++ 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h index 60b17a2ff555..5113b7053b62 100644 --- a/include/linux/lockdep.h +++ b/include/linux/lockdep.h @@ -303,6 +303,7 @@ extern void lock_unpin_lock(struct lockdep_map *lock, struct pin_cookie); lockdep_assert_once(!current->lockdep_depth) #define lockdep_recursing(tsk) ((tsk)->lockdep_recursion) +extern bool lockdep_recursing_current(void); #define lockdep_pin_lock(l) lock_pin_lock(&(l)->dep_map) #define lockdep_repin_lock(l,c) lock_repin_lock(&(l)->dep_map, (c)) @@ -630,7 +631,7 @@ DECLARE_PER_CPU(int, hardirqs_enabled); DECLARE_PER_CPU(int, hardirq_context); DECLARE_PER_CPU(unsigned int, lockdep_recursion); -#define __lockdep_enabled (debug_locks && !this_cpu_read(lockdep_recursion)) +#define __lockdep_enabled (debug_locks && !this_cpu_read(lockdep_recursion) && !lockdep_recursing_current()) #define lockdep_assert_irqs_enabled() \ do { \ diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c index dc97f2753ef8..39b9e3e27c0b 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -6900,3 +6900,13 @@ void lockdep_rcu_suspicious(const char *file, const int line, const char *s) warn_rcu_exit(rcu); } EXPORT_SYMBOL_GPL(lockdep_rcu_suspicious); + +/* + * For avoiding header dependency when using (struct task_struct *)current + * and lockdep_recursing() at the same time. + */ +noinstr bool lockdep_recursing_current(void) +{ + return lockdep_recursing(current); +} +EXPORT_SYMBOL_GPL(lockdep_recursing_current); -- 2.17.1