From nobody Wed Dec 17 17:45:47 2025 Received: from invmail4.hynix.com (exvmail4.skhynix.com [166.125.252.92]) by smtp.subspace.kernel.org (Postfix) with ESMTP id D6AA83126C4; Thu, 2 Oct 2025 08:14:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=166.125.252.92 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759392857; cv=none; b=gipc70xUmmCH2U7MGBVcZtcQrtdZlv2CVxHdRsH7wXQZdOkgT61dg814AqmSUkPqRoU95kzFYbHGlXpyVkTCT2hhIzMvqDBKpflA2v4KiP0F1f2SOW2YExgO9ZpbmtkGGb6zmZ7uORy79G/2iXFn3HI4hWimf0vJ4+L/fV/EUAk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759392857; c=relaxed/simple; bh=Maxqvp8M2/Mbhj5qDNZmaX54vuIa2E/KjRgY0LGmkyY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References; b=ebxvb2q40nYY6zZgawJQ9xP5KUNmG1tvLAdzZD8aSojXRkuCebS5s0E4bSgIT6Sg9HlnauGya4B1joSTUVfkGa3ZrUMFx0OHcnMjfw+ra0ZiUDCt4kx5mx6p+NvojmrWcA4c4AYTegAmiED0+t/sDv8m6gfeieWsyPeVdliTBCg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sk.com; spf=pass smtp.mailfrom=sk.com; arc=none smtp.client-ip=166.125.252.92 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sk.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sk.com X-AuditID: a67dfc5b-c2dff70000001609-95-68de341581f1 From: Byungchul Park To: linux-kernel@vger.kernel.org Cc: 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, max.byungchul.park@gmail.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, dave.hansen@linux.intel.com, 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 Subject: [PATCH v17 42/47] dept: call dept_hardirqs_off() in local_irq_*() regardless of irq state Date: Thu, 2 Oct 2025 17:12:42 +0900 Message-Id: <20251002081247.51255-43-byungchul@sk.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20251002081247.51255-1-byungchul@sk.com> References: <20251002081247.51255-1-byungchul@sk.com> X-Brightmail-Tracker: H4sIAAAAAAAAAzWSa0xTZxjHed9z6Wmh7FDdPOqMpAma6IY31GeZm8vi5XxZYjKzeYta5cQ2 3FwLCE6TgqtDA7M2sUbKEKirXalaW2AodqkoKDbGVgxjysVOrBroGitCOihdwfjlyS+///95 Pj0MIfuLmseo8gsFdb4iV05LSEkopf7TD7MGlMvbWj+HnjIPCTVX7DT4LjciGHxbgWB8wkSA 7lqchJihUwSj0SciiLs7ERj9BgLsTWUY3jimaBi+FUEQtlQiqA6aRPCqYzOEBtsosAxNYRjy /IwgZsyB8w0uGibuPyDgpSOhmjoHELit5TQ81zcT0D2UCiF/DYZ/HTTUlbspOGa+QoN/eBJD n9GAodH5DQxagiR49Q0YjFfngOnsMZwYLzGcudSGIWqxicCizQDT/W4K/rFWi2AysALidQVw OfSAgq6BHgoG7xyn4A/tUxE4/+5AMPoogMFeGSTA+SyRnqvto+GGu4uEitgogu7rNTRUOpop GLDHKdCaxinwebwUPGz0kdBV/Tv5VTY/rvuF5G2uFszrHsZo3l5rR/zEfwbE6/QJujUSJvjf vCM0f6+B469V94v4OmcR77Iu4c03XmG+PvKW4h8Pf8E7bSfoLZk7JOuyhVxVsaBe9uVeiTLu aaIOln1QomuLkFoUSj6JxAzHZnHmC0bRe669GKammWYXc729UWKaZ7PpnKsqOOMJ1vsx1+P/ 5CRimFnsPs4WUE5rks3gzJdCM3Upu4a7fecZfndyIdfo8Mx4ccJ3B7zkNMvY1Zwu/FOiI0l0 Loq5532niHcLc7mb1l5Sj6R1KMmGZKr84jyFKjcrU1maryrJ3F+Q50SJd7McndzZiiK+b9sR yyB5itSX0a+UUYpiTWleO+IYQj5butfap5RJsxWlhwV1wR51Ua6gaUfzGVI+R7py7FC2jD2g KBRyBOGgoH6fYkY8T4vmBr67voH5vkMZPv1DC/rxTdqmVdvd9bX3xrA3WvokLTl6xBaQrhX0 mrztG2Wfra+v+tqflRr3nygsutvsxynlI4t3Gla/2Pxrk2SR5KmcWLCyWByTuyq2JbUGx460 XK2ZSt/9UU7Va3e/+c9IWtJQ8rpU5Ce3Hj+0dNsILtmVkyYnNUrFiiWEWqP4H3kUzzhqAwAA X-Brightmail-Tracker: H4sIAAAAAAAAAzWSW0xTaRSF/c/5z4WOlTMdMp4oidqEkMwgagJmZ2qMzosnRo0ao4kvUvA4 rdxMiwwYTbg1EEaUNrZEqlghFqSACGjEWiSg9YIItSPgQGWqHbxArVGQIIVOwfiys/a3VnbW w2ZJ2Q1qBavOyBI1Gco0OS3Bkl2KwrVRCS9V659bEmEgvxPD1GQJhgvXGmgoaTlPQX+TDcHo VAmC6VkzCbr2EIY5g5OByZlhBkIOJwKTy0BCQ1s+AZ+b52kY7/6EwOj10VDxLh9DwHoaQeWY mYF397eBf9ROQcjzhoDBLxMIrL55AnydxQjmTKlwqbqVhtnePhIqjP0ILns9JLxtDpttzpcI HHUFNPxXfoMEt28Z/D0VoOGR8S8a/K4LBHxopsFS4KDgotmAoLDmGg2miy0Y2v+9zYBrPEjA iMlAgK1lJ4xaxzD0lFcT4X7h1PXlYK4oJMLjLQHGRjsBM9Z6Bp7UjGCw5sWAuddNwau6SgaC 3g0QsmSC0/aGAc9ZI4Ymfx+1xYiEad0ZLNS33iQE3bM5WmioakDC7FcDEiavFJKCrjy8dk8E SKGo9U/hSs8ELXydek4Lji8WLDyu5gV971qhvdLDCEUd/zC7fzso2XRYTFNni5p1m5MkqlBn G3UsPzJHZ/+E85D/h1IUwfJcAl9VG6AWNM3F8kNDM+SCjuJW861lY4uc5Hqi+QFXXCli2Z+4 ZL7eq1rAmIvhaxr9i3Ept5G/9+A18e3kKt7W3LnII8Lc7e3BC1rGJfK6QBFRjiQWtKQeRakz stOV6rTEeG2qKjdDnROfkpnegsLPZD0V1N9Ck+5tXYhjkXyp1BXjUckoZbY2N70L8Swpj5Im 1Y2oZNLDytwToibzkOZ4mqjtQitZLF8u3X5ATJJxfyizxFRRPCZqvrsEG7EiD+XK++ePDA25 dt8sS0k5nfJsP467e3lHxL41YvKDvuBt51XFj47pO9EF9u2xOabk8TNPi4cteved4sFh/b5V 8ZEKf+T10ljS1ntu696f4371lH2kqjpifFxAR++piHcpqj+4DO83js09VKjHT9b+3mTX9ye8 aHwaLe4J7tVlzcQelWOtSrnhF1KjVf4P8xIkJkgDAAA= X-CFilter-Loop: Reflected Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" For dept to function properly, dept_task()->hardirqs_enabled must be set correctly. If it fails to set this value to false, for example, dept may mistakenly think irq is still enabled even when it's not. Do dept_hardirqs_off() regardless of irq state not to miss any unexpected cases by any chance e.g. changes of the state by asm code. Signed-off-by: Byungchul Park --- include/linux/irqflags.h | 14 ++++++++++++++ kernel/dependency/dept.c | 1 + 2 files changed, 15 insertions(+) diff --git a/include/linux/irqflags.h b/include/linux/irqflags.h index d8b9cf093f83..586f5bad4da7 100644 --- a/include/linux/irqflags.h +++ b/include/linux/irqflags.h @@ -214,6 +214,13 @@ extern void warn_bogus_irq_restore(void); raw_local_irq_disable(); \ if (!was_disabled) \ trace_hardirqs_off(); \ + /* \ + * Just in case that C code has missed \ + * trace_hardirqs_off() at the first \ + * place e.g. disabling irq at asm code.\ + */ \ + else \ + dept_hardirqs_off(); \ } while (0) =20 #define local_irq_save(flags) \ @@ -221,6 +228,13 @@ extern void warn_bogus_irq_restore(void); raw_local_irq_save(flags); \ if (!raw_irqs_disabled_flags(flags)) \ trace_hardirqs_off(); \ + /* \ + * Just in case that C code has missed \ + * trace_hardirqs_off() at the first \ + * place e.g. disabling irq at asm code.\ + */ \ + else \ + dept_hardirqs_off(); \ } while (0) =20 #define local_irq_restore(flags) \ diff --git a/kernel/dependency/dept.c b/kernel/dependency/dept.c index 0f4464657288..a17b185d6a6a 100644 --- a/kernel/dependency/dept.c +++ b/kernel/dependency/dept.c @@ -2248,6 +2248,7 @@ void noinstr dept_hardirqs_off(void) */ dept_task()->hardirqs_enabled =3D false; } +EXPORT_SYMBOL_GPL(dept_hardirqs_off); =20 void noinstr dept_update_cxt(void) { --=20 2.17.1