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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-a9-693287725a35 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, 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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 v18 31/42] dept: assign unique dept_key to each distinct wait_for_completion() caller Date: Fri, 5 Dec 2025 16:18:44 +0900 Message-Id: <20251205071855.72743-32-byungchul@sk.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20251205071855.72743-1-byungchul@sk.com> References: <20251205071855.72743-1-byungchul@sk.com> X-Brightmail-Tracker: H4sIAAAAAAAAAzWSa2xTZRjHfc/lPWeFykklejZUTKPBSJjdRHw+eCEx6BsSE4aJQdBgw07s Cd3F7q4SNhGoyxjLdCBrxzrZ2m2njNpC2BYGu8gER1lxCUxkN53DrV2npSt264bdCN9+z/O/ PF8entbcZpN4OTNXMmXqjVqsYlTTK+s2mA6nyrrodCqYD+6H2bCZAesZJ4YFy3kOzO4TLPha FAQjs2YE9+ctNCxU9nLgPFtCwfHJEgZm7GUI7OOLFNT+4MHgP/YPhnlvPw11Y0M0dDR+heGv inM0BF0Y2kbbObjhj1GguN+DqL2ZA4t3gIXYWAoMHa1ioGW6nwX/RCWG88WjHLh/u4zAWTYR 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cFhS3kAvZVWabFGrUaoVjJSSbt9giNMWrlPF64PRWGQ8ji99fhqf6T0UBgNFFJbV1TIYtv8m wSLnBRrv9xRQ2Hm9BtAXLAKcmLKTaGycpTBsaZNgIPRCglY94Ky7DdDmtZDY23mHxNobegLH 6mcYHGoZBbT2+xksGdRTOOI4DVg6YJfgYOs2fOO7TeNs3z8E9owPAzr8MwT6PYWAYVs6Xqpw RcZt7xicetxBYom1E/Byfx+Jo4OvAG+0/QnovlrA4GvzTRK7/J/g0+AIgw+spxh84y0j8G09 g+UFbhq97UOAF+0WwIHnbgINlXUM2i46KWx81SRB79A0gS9tFgJrnEnocwxQ+MhcQUTOjaR+ XYz2EgMRKf8SaL12m8CQo1qyuQqECWMxJVS7GgjB+CTMCLU/14IwNWkBIVBlIAWjOdK2DI+Q wgnXUaHq0TAjTAa7GcE9Xk4JDyt44ZeTk4Rw7nGc0FjaJ0ne8o10Y6qoVuWI2jVf7Jem+e07 MwNZuaErLZAPt1JMEMXyXALvn71LzTHDfc739obIOY7hPuVdZwZoE0hZkutazheGiueNRZzI D56fJkzAshS3gm+/w8zJMi6R9z08Df/vXM7X1Hvm41ER3dozOc9ybj1/yTRBm0FaDguqIUal yclQqtTrV+vS0/I0qtzVBw5nOCHyTY5j0+duQaBrWzNwLCgWyjxH16rktDJHl5fRDDxLKmJk w+p4lVyWqsz7VtQe3qc9ohZ1zbCMpRSLZV/uEffLuUPKbDFdFDNF7UeXYKOW5oPnr1U5sTu/ Sk6YjsvMuLqk25TkOBDX6j20bGvxovjPDl5rqOmhHe3v1/zd9GP//U27i0+0JTSGL+9KMU+d nSBWPogeiSmVVHCpv+c2hG1fS2PH/qhckLwjv+77687vQGro+GHvhqyzPzXdbO2eubeSTPyv ObZMt+egP8mVaH79VFOgyFJQujTl2lhSq1N+AFdBCE5JAwAA 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" wait_for_completion() can be used at various points in the code and it's very hard to distinguish wait_for_completion()s between different usages. Using a single dept_key for all the wait_for_completion()s could trigger false positive reports. Assign unique dept_key to each distinct wait_for_completion() caller to avoid false positive reports. While at it, add a rust helper for wait_for_completion() to avoid build errors. Signed-off-by: Byungchul Park --- include/linux/completion.h | 100 +++++++++++++++++++++++++++++++------ kernel/sched/completion.c | 60 +++++++++++----------- rust/helpers/completion.c | 5 ++ 3 files changed, 120 insertions(+), 45 deletions(-) diff --git a/include/linux/completion.h b/include/linux/completion.h index 3200b741de28..4d8fb1d95c0a 100644 --- a/include/linux/completion.h +++ b/include/linux/completion.h @@ -27,12 +27,10 @@ struct completion { unsigned int done; struct swait_queue_head wait; - struct dept_map dmap; }; =20 #define init_completion(x) \ do { \ - sdt_map_init(&(x)->dmap); \ __init_completion(x); \ } while (0) =20 @@ -43,17 +41,14 @@ do { \ =20 static inline void complete_acquire(struct completion *x, long timeout) { - sdt_might_sleep_start_timeout(&x->dmap, timeout); } =20 static inline void complete_release(struct completion *x) { - sdt_might_sleep_end(); } =20 #define COMPLETION_INITIALIZER(work) \ - { 0, __SWAIT_QUEUE_HEAD_INITIALIZER((work).wait), \ - .dmap =3D DEPT_MAP_INITIALIZER(work, NULL), } + { 0, __SWAIT_QUEUE_HEAD_INITIALIZER((work).wait), } =20 #define COMPLETION_INITIALIZER_ONSTACK_MAP(work, map) \ (*({ init_completion_map(&(work), &(map)); &(work); })) @@ -119,18 +114,18 @@ static inline void reinit_completion(struct completio= n *x) x->done =3D 0; } =20 -extern void wait_for_completion(struct completion *); -extern void wait_for_completion_io(struct completion *); -extern int wait_for_completion_interruptible(struct completion *x); -extern int wait_for_completion_killable(struct completion *x); -extern int wait_for_completion_state(struct completion *x, unsigned int st= ate); -extern unsigned long wait_for_completion_timeout(struct completion *x, +extern void __wait_for_completion(struct completion *); +extern void __wait_for_completion_io(struct completion *); +extern int __wait_for_completion_interruptible(struct completion *x); +extern int __wait_for_completion_killable(struct completion *x); +extern int __wait_for_completion_state(struct completion *x, unsigned int = state); +extern unsigned long __wait_for_completion_timeout(struct completion *x, unsigned long timeout); -extern unsigned long wait_for_completion_io_timeout(struct completion *x, +extern unsigned long __wait_for_completion_io_timeout(struct completion *x, unsigned long timeout); -extern long wait_for_completion_interruptible_timeout( +extern long __wait_for_completion_interruptible_timeout( struct completion *x, unsigned long timeout); -extern long wait_for_completion_killable_timeout( +extern long __wait_for_completion_killable_timeout( struct completion *x, unsigned long timeout); extern bool try_wait_for_completion(struct completion *x); extern bool completion_done(struct completion *x); @@ -139,4 +134,79 @@ extern void complete(struct completion *); extern void complete_on_current_cpu(struct completion *x); extern void complete_all(struct completion *); =20 +#define wait_for_completion(x) \ +({ \ + sdt_might_sleep_start_timeout(NULL, -1L); \ + __wait_for_completion(x); \ + sdt_might_sleep_end(); \ +}) +#define wait_for_completion_io(x) \ +({ \ + sdt_might_sleep_start_timeout(NULL, -1L); \ + __wait_for_completion_io(x); \ + sdt_might_sleep_end(); \ +}) +#define wait_for_completion_interruptible(x) \ +({ \ + int __ret; \ + \ + sdt_might_sleep_start_timeout(NULL, -1L); \ + __ret =3D __wait_for_completion_interruptible(x); \ + sdt_might_sleep_end(); \ + __ret; \ +}) +#define wait_for_completion_killable(x) \ +({ \ + int __ret; \ + \ + sdt_might_sleep_start_timeout(NULL, -1L); \ + __ret =3D __wait_for_completion_killable(x); \ + sdt_might_sleep_end(); \ + __ret; \ +}) +#define wait_for_completion_state(x, s) \ +({ \ + int __ret; \ + \ + sdt_might_sleep_start_timeout(NULL, -1L); \ + __ret =3D __wait_for_completion_state(x, s); \ + sdt_might_sleep_end(); \ + __ret; \ +}) +#define wait_for_completion_timeout(x, t) \ +({ \ + unsigned long __ret; \ + \ + sdt_might_sleep_start_timeout(NULL, t); \ + __ret =3D __wait_for_completion_timeout(x, t); \ + sdt_might_sleep_end(); \ + __ret; \ +}) +#define wait_for_completion_io_timeout(x, t) \ +({ \ + unsigned long __ret; \ + \ + sdt_might_sleep_start_timeout(NULL, t); \ + __ret =3D __wait_for_completion_io_timeout(x, t); \ + sdt_might_sleep_end(); \ + __ret; \ +}) +#define wait_for_completion_interruptible_timeout(x, t) \ +({ \ + long __ret; \ + \ + sdt_might_sleep_start_timeout(NULL, t); \ + __ret =3D __wait_for_completion_interruptible_timeout(x, t); \ + sdt_might_sleep_end(); \ + __ret; \ +}) +#define wait_for_completion_killable_timeout(x, t) \ +({ \ + long __ret; \ + \ + sdt_might_sleep_start_timeout(NULL, t); \ + __ret =3D __wait_for_completion_killable_timeout(x, t); \ + sdt_might_sleep_end(); \ + __ret; \ +}) #endif diff --git a/kernel/sched/completion.c b/kernel/sched/completion.c index 5e45a60ff7b3..7262000db114 100644 --- a/kernel/sched/completion.c +++ b/kernel/sched/completion.c @@ -4,7 +4,7 @@ * Generic wait-for-completion handler; * * It differs from semaphores in that their default case is the opposite, - * wait_for_completion default blocks whereas semaphore default non-block.= The + * __wait_for_completion default blocks whereas semaphore default non-bloc= k. The * interface also makes it easy to 'complete' multiple waiting threads, * something which isn't entirely natural for semaphores. * @@ -42,7 +42,7 @@ void complete_on_current_cpu(struct completion *x) * This will wake up a single thread waiting on this completion. Threads w= ill be * awakened in the same order in which they were queued. * - * See also complete_all(), wait_for_completion() and related routines. + * See also complete_all(), __wait_for_completion() and related routines. * * If this function wakes up a task, it executes a full memory barrier bef= ore * accessing the task state. @@ -139,23 +139,23 @@ wait_for_common_io(struct completion *x, long timeout= , int state) } =20 /** - * wait_for_completion: - waits for completion of a task + * __wait_for_completion: - waits for completion of a task * @x: holds the state of this particular completion * * This waits to be signaled for completion of a specific task. It is NOT * interruptible and there is no timeout. * - * See also similar routines (i.e. wait_for_completion_timeout()) with tim= eout + * See also similar routines (i.e. __wait_for_completion_timeout()) with t= imeout * and interrupt capability. Also see complete(). */ -void __sched wait_for_completion(struct completion *x) +void __sched __wait_for_completion(struct completion *x) { wait_for_common(x, MAX_SCHEDULE_TIMEOUT, TASK_UNINTERRUPTIBLE); } -EXPORT_SYMBOL(wait_for_completion); +EXPORT_SYMBOL(__wait_for_completion); =20 /** - * wait_for_completion_timeout: - waits for completion of a task (w/timeou= t) + * __wait_for_completion_timeout: - waits for completion of a task (w/time= out) * @x: holds the state of this particular completion * @timeout: timeout value in jiffies * @@ -167,28 +167,28 @@ EXPORT_SYMBOL(wait_for_completion); * till timeout) if completed. */ unsigned long __sched -wait_for_completion_timeout(struct completion *x, unsigned long timeout) +__wait_for_completion_timeout(struct completion *x, unsigned long timeout) { return wait_for_common(x, timeout, TASK_UNINTERRUPTIBLE); } -EXPORT_SYMBOL(wait_for_completion_timeout); +EXPORT_SYMBOL(__wait_for_completion_timeout); =20 /** - * wait_for_completion_io: - waits for completion of a task + * __wait_for_completion_io: - waits for completion of a task * @x: holds the state of this particular completion * * This waits to be signaled for completion of a specific task. It is NOT * interruptible and there is no timeout. The caller is accounted as waiti= ng * for IO (which traditionally means blkio only). */ -void __sched wait_for_completion_io(struct completion *x) +void __sched __wait_for_completion_io(struct completion *x) { wait_for_common_io(x, MAX_SCHEDULE_TIMEOUT, TASK_UNINTERRUPTIBLE); } -EXPORT_SYMBOL(wait_for_completion_io); +EXPORT_SYMBOL(__wait_for_completion_io); =20 /** - * wait_for_completion_io_timeout: - waits for completion of a task (w/tim= eout) + * __wait_for_completion_io_timeout: - waits for completion of a task (w/t= imeout) * @x: holds the state of this particular completion * @timeout: timeout value in jiffies * @@ -201,14 +201,14 @@ EXPORT_SYMBOL(wait_for_completion_io); * till timeout) if completed. */ unsigned long __sched -wait_for_completion_io_timeout(struct completion *x, unsigned long timeout) +__wait_for_completion_io_timeout(struct completion *x, unsigned long timeo= ut) { return wait_for_common_io(x, timeout, TASK_UNINTERRUPTIBLE); } -EXPORT_SYMBOL(wait_for_completion_io_timeout); +EXPORT_SYMBOL(__wait_for_completion_io_timeout); =20 /** - * wait_for_completion_interruptible: - waits for completion of a task (w/= intr) + * __wait_for_completion_interruptible: - waits for completion of a task (= w/intr) * @x: holds the state of this particular completion * * This waits for completion of a specific task to be signaled. It is @@ -216,7 +216,7 @@ EXPORT_SYMBOL(wait_for_completion_io_timeout); * * Return: -ERESTARTSYS if interrupted, 0 if completed. */ -int __sched wait_for_completion_interruptible(struct completion *x) +int __sched __wait_for_completion_interruptible(struct completion *x) { long t =3D wait_for_common(x, MAX_SCHEDULE_TIMEOUT, TASK_INTERRUPTIBLE); =20 @@ -224,10 +224,10 @@ int __sched wait_for_completion_interruptible(struct = completion *x) return t; return 0; } -EXPORT_SYMBOL(wait_for_completion_interruptible); +EXPORT_SYMBOL(__wait_for_completion_interruptible); =20 /** - * wait_for_completion_interruptible_timeout: - waits for completion (w/(t= o,intr)) + * __wait_for_completion_interruptible_timeout: - waits for completion (w/= (to,intr)) * @x: holds the state of this particular completion * @timeout: timeout value in jiffies * @@ -238,15 +238,15 @@ EXPORT_SYMBOL(wait_for_completion_interruptible); * or number of jiffies left till timeout) if completed. */ long __sched -wait_for_completion_interruptible_timeout(struct completion *x, +__wait_for_completion_interruptible_timeout(struct completion *x, unsigned long timeout) { return wait_for_common(x, timeout, TASK_INTERRUPTIBLE); } -EXPORT_SYMBOL(wait_for_completion_interruptible_timeout); +EXPORT_SYMBOL(__wait_for_completion_interruptible_timeout); =20 /** - * wait_for_completion_killable: - waits for completion of a task (killabl= e) + * __wait_for_completion_killable: - waits for completion of a task (killa= ble) * @x: holds the state of this particular completion * * This waits to be signaled for completion of a specific task. It can be @@ -254,7 +254,7 @@ EXPORT_SYMBOL(wait_for_completion_interruptible_timeout= ); * * Return: -ERESTARTSYS if interrupted, 0 if completed. */ -int __sched wait_for_completion_killable(struct completion *x) +int __sched __wait_for_completion_killable(struct completion *x) { long t =3D wait_for_common(x, MAX_SCHEDULE_TIMEOUT, TASK_KILLABLE); =20 @@ -262,9 +262,9 @@ int __sched wait_for_completion_killable(struct complet= ion *x) return t; return 0; } -EXPORT_SYMBOL(wait_for_completion_killable); +EXPORT_SYMBOL(__wait_for_completion_killable); =20 -int __sched wait_for_completion_state(struct completion *x, unsigned int s= tate) +int __sched __wait_for_completion_state(struct completion *x, unsigned int= state) { long t =3D wait_for_common(x, MAX_SCHEDULE_TIMEOUT, state); =20 @@ -272,10 +272,10 @@ int __sched wait_for_completion_state(struct completi= on *x, unsigned int state) return t; return 0; } -EXPORT_SYMBOL(wait_for_completion_state); +EXPORT_SYMBOL(__wait_for_completion_state); =20 /** - * wait_for_completion_killable_timeout: - waits for completion of a task = (w/(to,killable)) + * __wait_for_completion_killable_timeout: - waits for completion of a tas= k (w/(to,killable)) * @x: holds the state of this particular completion * @timeout: timeout value in jiffies * @@ -287,12 +287,12 @@ EXPORT_SYMBOL(wait_for_completion_state); * or number of jiffies left till timeout) if completed. */ long __sched -wait_for_completion_killable_timeout(struct completion *x, +__wait_for_completion_killable_timeout(struct completion *x, unsigned long timeout) { return wait_for_common(x, timeout, TASK_KILLABLE); } -EXPORT_SYMBOL(wait_for_completion_killable_timeout); +EXPORT_SYMBOL(__wait_for_completion_killable_timeout); =20 /** * try_wait_for_completion - try to decrement a completion without blocking @@ -334,7 +334,7 @@ EXPORT_SYMBOL(try_wait_for_completion); * completion_done - Test to see if a completion has any waiters * @x: completion structure * - * Return: 0 if there are waiters (wait_for_completion() in progress) + * Return: 0 if there are waiters (__wait_for_completion() in progress) * 1 if there are no waiters. * * Note, this will always return true if complete_all() was called on @X. diff --git a/rust/helpers/completion.c b/rust/helpers/completion.c index b2443262a2ae..5bae5e749def 100644 --- a/rust/helpers/completion.c +++ b/rust/helpers/completion.c @@ -6,3 +6,8 @@ void rust_helper_init_completion(struct completion *x) { init_completion(x); } + +void rust_helper_wait_for_completion(struct completion *x) +{ + wait_for_completion(x); +} --=20 2.17.1