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* doc: Remove references to arrayRCU.rstZenghui Yu2024-04-091-3/+3
| | | | | | | | | | arrayRCU.rst has been removed since commit ef2555cf68c3 ("doc: Remove arrayRCU.rst") but is still referenced by whatisRCU.rst. Update it to reflect the current state of the documentation. Signed-off-by: Zenghui Yu <zenghui.yu@linux.dev> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
* Merge tag 'docs-6.9' of git://git.lwn.net/linuxLinus Torvalds2024-03-121-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull documentation updates from Jonathan Corbet: "A moderatly busy cycle for development this time around. - Some cleanup of the main index page for easier navigation - Rework some of the other top-level pages for better readability and, with luck, fewer merge conflicts in the future. - Submit-checklist improvements, hopefully the first of many. - New Italian translations - A fair number of kernel-doc fixes and improvements. We have also dropped the recommendation to use an old version of Sphinx. - A new document from Thorsten on bisection ... and lots of fixes and updates" * tag 'docs-6.9' of git://git.lwn.net/linux: (54 commits) docs: verify/bisect: fixes, finetuning, and support for Arch docs: Makefile: Add dependency to $(YNL_INDEX) for targets other than htmldocs docs: Move ja_JP/howto.rst to ja_JP/process/howto.rst docs: submit-checklist: use subheadings docs: submit-checklist: structure by category docs: new text on bisecting which also covers bug validation docs: drop the version constraints for sphinx and dependencies docs: kerneldoc-preamble.sty: Remove code for Sphinx <2.4 docs: Restore "smart quotes" for quotes docs/zh_CN: accurate translation of "function" docs: Include simplified link titles in main index docs: Correct formatting of title in admin-guide/index.rst docs: kernel_feat.py: fix build error for missing files MAINTAINERS: Set the field name for subsystem profile section kasan: Add documentation for CONFIG_KASAN_EXTRA_INFO Fixed case issue with 'fault-injection' in documentation kernel-doc: handle #if in enums as well Documentation: update mailing list addresses doc: kerneldoc.py: fix indentation scripts/kernel-doc: simplify signature printing ...
| * doc:it_IT: first translation for locking/Federico Vaga2024-01-301-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To begin with: - locking/index.rst - locking/lockdep-design.rst - locking/lockstat.rst - locking/lockturture.rst - locking/locktypes.rst And RCU/torture.rst to avoid broken references. Signed-off-by: Federico Vaga <federico.vaga@vaga.pv.it> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240106233820.30454-1-federico.vaga@vaga.pv.it
* | doc: Update checklist.rst discussion of callback executionPaul E. McKenney2024-02-141-10/+11
| | | | | | | | | | | | | | | | | | This commit completes the list of call_rcu*() functions that are not guaranteed to have their callbacks executing on the same CPU. While in the area, fix an unrelated typo. Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
* | doc: Clarify use of slab constructors and SLAB_TYPESAFE_BY_RCUPaul E. McKenney2024-02-141-2/+2
| | | | | | | | | | | | | | | | This commit explicitly states that you should initialize any locks to be used by readers in your SLAB_TYPESAFE_BY_RCU constructor. Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
* | doc: Add CONFIG_RCU_STRICT_GRACE_PERIOD to checklist.rstPaul E. McKenney2024-02-141-0/+6
| | | | | | | | | | | | | | | | This commit adds CONFIG_RCU_STRICT_GRACE_PERIOD to the list of debugging Kconfig options in checklist.rst. Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
* | doc: Make checklist.rst note that spinlocks are implied RCU readersPaul E. McKenney2024-02-141-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | In kernels built with CONFIG_PREEMPT_RT=n, spinlock critical sections are RCU readers because they disable preemption. However, they are also RCU readers in CONFIG_PREEMPT_RT=y because in that case the locking primitives contain rcu_read_lock() and rcu_read_unlock(). Therefore, upgrade checklist.rst to document this non-obvious case. While in the area, fix a typo by changing "read-side critical" to "read-side critical section". Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
* | doc: Make whatisRCU.rst note that spinlocks are RCU readersPaul E. McKenney2024-02-141-2/+13
| | | | | | | | | | | | | | | | | | | | | | In kernels built with CONFIG_PREEMPT_RT=n, spinlock critical sections are RCU readers because they disable preemption. However, they are also RCU readers in CONFIG_PREEMPT_RT=y because in that case the locking primitives contain rcu_read_lock() and rcu_read_unlock(). Therefore, upgrade whatisRCU.rst to document this non-obvious case. Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
* | doc: Spinlocks are implied RCU readersPaul E. McKenney2024-02-141-1/+4
|/ | | | | | | | | | | | | In kernels built with CONFIG_PREEMPT_RT=n, spinlock critical sections are RCU readers because they disable preemption. However, they are also RCU readers in CONFIG_PREEMPT_RT=y because the -rt locking primitives contain rcu_read_lock() and rcu_read_unlock(). Therefore, upgrade rcu_dereference.rst to document this non-obvious case. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Closes: https://lore.kernel.org/lkml/CAHk-=whGKvjHCtJ6W4pQ0_h_k9fiFQ8V2GpM=BqYnB2X=SJ+XQ@mail.gmail.com/ Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
* doc: Mention address and data dependencies in rcu_dereference.rstPaul E. McKenney2023-12-141-7/+20
| | | | | | | | | | | | This commit adds discussion of address and data dependencies to the beginning of rcu_dereference.rst in order to enable readers to more easily make the connection to the Linux-kernel memory model in general and to memory-barriers.txt in particular. Reported-by: Jonas Oberhauser <jonas.oberhauser@huaweicloud.com> Reported-by: Akira Yokosawa <akiyks@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Neeraj Upadhyay (AMD) <neeraj.iitr10@gmail.com>
* doc: Clarify RCU Tasks reader/updater checklistPaul E. McKenney2023-12-141-9/+16
| | | | | | | | | | | | | | | Currently, the reader/updater compatibility rules for the three RCU Tasks flavors are squished together in a single paragraph, which can result in confusion. This commit therefore splits them out into a list, clearly showing the distinction between these flavors. Link: https://lore.kernel.org/all/20231002211936.5948253e@gandalf.local.home/ Reported-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org> Signed-off-by: Neeraj Upadhyay (AMD) <neeraj.iitr10@gmail.com>
* Documentation: RCU: Remove repeated word in commentsCharles Han2023-12-141-1/+1
| | | | | | | | Remove the repeated word "of" in comments. Signed-off-by: Charles Han <hanchunchao@inspur.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Neeraj Upadhyay (AMD) <neeraj.iitr10@gmail.com>
*-. Merge branches 'rcu/torture', 'rcu/fixes', 'rcu/docs', 'rcu/refscale', ↵Frederic Weisbecker2023-10-238-29/+20
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 'rcu/tasks' and 'rcu/stall' into rcu/next rcu/torture: RCU torture, locktorture and generic torture infrastructure rcu/fixes: Generic and misc fixes rcu/docs: RCU documentation updates rcu/refscale: RCU reference scalability test updates rcu/tasks: RCU tasks updates rcu/stall: Stall detection updates
| | * rcu: Remove references to rcu_migrate_callbacks() from diagramsFrederic Weisbecker2023-10-042-18/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | This function is gone since: 53b46303da84 (rcu: Remove rsp parameter from rcu_boot_init_percpu_data() and friends) Reviewed-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
| | * rcu: Describe listRCU read-side guaranteesMatthew Wilcox (Oracle)2023-09-111-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | More explicitly state what is, and what is not guaranteed to those who iterate a list while protected by RCU. [ paulmck: Apply Joel Fernandes feedback. ] Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
| | * Documentation: RCU: Fix section numbers after adding Section 7 in whatisRCU.rstWei Zhang2023-09-111-2/+2
| |/ |/| | | | | | | | | | | Signed-off-by: Wei Zhang <zhangweilst@gmail.com> Reviewed-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
| * rcu: Standardize explicit CPU-hotplug callsFrederic Weisbecker2023-10-045-9/+9
|/ | | | | | | | | | | | | | | rcu_report_dead() and rcutree_migrate_callbacks() have their headers in rcupdate.h while those are pure rcutree calls, like the other CPU-hotplug functions. Also rcu_cpu_starting() and rcu_report_dead() have different naming conventions while they mirror each other's effects. Fix the headers and propose a naming that relates both functions and aligns with the prefix of other rcutree CPU-hotplug functions. Reviewed-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
* Docs/RCU/rculist_nulls: Fix text about atomic_set_release()SeongJae Park2023-07-141-2/+4
| | | | | | | | | | The document says we can avoid extra _release() in insert function when hlist_nulls is used, but that's not true[1]. Drop it. [1] https://lore.kernel.org/rcu/46440869-644a-4982-b790-b71b43976c66@paulmck-laptop/ Signed-off-by: SeongJae Park <sj@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* Docs/RCU/rculist_nulls: Fix hlist_[nulls]_head field names of 'obj'SeongJae Park2023-07-141-4/+4
| | | | | | | | | | | The example code snippets on rculist_nulls.rst are assuming 'obj' to have the 'hlist_head' or 'hlist_nulls_head' field named 'obj_node', but a sentence and some code snippets are wrongly calling 'obj->obj_node.next' as 'obj->obj_next', or 'obj->obj_node' as 'member'. Fix it. Signed-off-by: SeongJae Park <sj@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* Docs/RCU/rculist_nulls: Specify type of the object in examplesSeongJae Park2023-07-141-1/+13
| | | | | | | | | | The type of 'obj' in example code of rculist_nulls.rst is implicit. Provide the specific type of it before the example code. Suggested-by: Paul E. McKenney <paulmck@kernel.org> Link: https://lore.kernel.org/rcu/43943609-f80c-4b6a-9844-994eef800757@paulmck-laptop/ Signed-off-by: SeongJae Park <sj@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* Docs/RCU/rculist_nulls: Assign 'obj' before use from the examplesSeongJae Park2023-07-141-2/+2
| | | | | | | | | Lookup example code snippets in rculist_nulls.rst are using 'obj' without assignment. Fix the code to assign it properly. Signed-off-by: SeongJae Park <sj@kernel.org> Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* Docs/RCU/rculist_nulls: Fix trivial coding styleSeongJae Park2023-07-141-3/+3
| | | | | | | | | | | Lookup example of non-hlist_nulls management is missing a semicolon, and having inconsistent indentation (one line is using single space indentation while others are using two spaces indentation). Fix the trivial issues. Signed-off-by: SeongJae Park <sj@kernel.org> Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* docs/RCU: Add the missing rcu_read_unlock()Alan Huang2023-07-141-1/+3
| | | | | | | We should exit the RCU read-side critical section before re-entering. Signed-off-by: Alan Huang <mmpgouride@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* documentation/rcu: Fix typoTycho Andersen2023-07-141-1/+1
| | | | | | | s/slat/splat/ Signed-off-by: Tycho Andersen <tandersen@netflix.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* rcu: Remove RCU_NONIDLE()Peter Zijlstra2023-05-112-36/+1
| | | | | | | | | | | | Since there are now exactly _zero_ users of RCU_NONIDLE(), make it go away before someone else decides to (ab)use it. [ paulmck: Remove extraneous whitespace. ] Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Frederic Weisbecker <frederic@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* doc: Update whatisRCU.rstUladzislau Rezki (Sony)2023-04-051-3/+3
| | | | | | | | | | The kfree_rcu() macro is deprecated. Rename it to its new kfree_rcu_mightsleep() name in this documentation. Acked-by: Joel Fernandes (Google) <joel@joelfernandes.org> Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
* Documentation: RCU: Correct spellingRandy Dunlap2023-04-056-14/+14
| | | | | | | | | | | | | | | | | | | | | Correct spelling problems for Documentation/RCU/ as reported by codespell. Note: in RTFP.txt, there are other misspellings that are left as is since they were used that way in email Subject: lines or in LWN.net articles. [preemptable, Preemptable, synchonisation] Acked-by: Joel Fernandes (Google) <joel@joelfernandes.org> Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: linux-doc@vger.kernel.org Cc: "Paul E. McKenney" <paulmck@kernel.org> Cc: Frederic Weisbecker <frederic@kernel.org> Cc: Neeraj Upadhyay <quic_neeraju@quicinc.com> Cc: Josh Triplett <josh@joshtriplett.org> Cc: rcu@vger.kernel.org Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
* Documentation/RCU: s/not/note/ in checklist.rstQiuxu Zhuo2023-04-051-1/+1
| | | | | | | | | | "Please not that you *cannot* rely..." has a typo. Fix it. Acked-by: Joel Fernandes (Google) <joel@joelfernandes.org> Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
* doc: Fix htmldocs build warnings of stallwarn.rstZhen Lei2023-01-051-26/+30
| | | | | | | | | | | | | | | | | | | | | | Documentation/RCU/stallwarn.rst: 401: WARNING: Literal block expected; none found. 428: WARNING: Literal block expected; none found. 445: WARNING: Literal block expected; none found. 459: WARNING: Literal block expected; none found. 468: WARNING: Literal block expected; none found. The literal block needs to be indented, so this commit adds two spaces to each line. In addition, ':', which is used as a boundary in the literal block, is replaced by '|'. Link: https://lore.kernel.org/linux-next/20221123163255.48653674@canb.auug.org.au/ Fixes: 3d2788ba4573 ("doc: Document CONFIG_RCU_CPU_STALL_CPUTIME=y stall information") Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> Tested-by: Akira Yokosawa <akiyks@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* docs/RCU/rcubarrier: Right-adjust line numbers in code snippetsAkira Yokosawa2023-01-051-84/+84
| | | | | | | | | | | | | | | | | | | Line numbers in code snippets in rcubarrier.rst have beed left adjusted since commit 4af498306ffd ("doc: Convert to rcubarrier.txt to ReST"). This might have been because right adjusting them had confused Sphinx. The rules around a literal block in reST are: - Need a blank line above it. - A line with the same indent level as the line above it is regarded as the end of it. Those line numbers can be right adjusted by keeping indents at two- digit numbers. While at it, add some spaces between the column of line numbers and the code area for better readability. Signed-off-by: Akira Yokosawa <akiyks@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* docs/RCU/rcubarrier: Adjust 'Answer' parts of QQs as definition-listsAkira Yokosawa2023-01-051-3/+6
| | | | | | | | | | | The "Answer" parts of QQs divert from proper format of definition-lists as described at [1] and are not rendered as such. Adjust them. Link: [1] https://docutils.sourceforge.io/docs/ref/rst/restructuredtext.html#definition-lists Signed-off-by: Akira Yokosawa <akiyks@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* doc: Document CONFIG_RCU_CPU_STALL_CPUTIME=y stall informationZhen Lei2023-01-051-0/+88
| | | | | | | | | | | | This commit documents the additional RCU CPU stall warning output produced by kernels built with CONFIG_RCU_CPU_STALL_CPUTIME=y or booted with rcupdate.rcu_cpu_stall_cputime=1. [ paulmck: Apply wordsmithing. ] Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> Reviewed-by: Frederic Weisbecker <frederic@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* doc: Update whatisRCU.rstPaul E. McKenney2023-01-051-68/+125
| | | | | | | This commit updates whatisRCU.rst with wordsmithing and updates provokes by the passage of time. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* doc: Update rcu.rst URL to RCU publicationsPaul E. McKenney2023-01-051-1/+2
| | | | | | Also add the more recent thicket of Google Documents. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* doc: Update UP.rstPaul E. McKenney2023-01-051-2/+11
| | | | | | | This commit updates UP.rst to reflect changes over the past few years, including the advent of userspace RCU libraries for constrained systems. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* doc: Update torture.rstPaul E. McKenney2023-01-051-4/+85
| | | | | | | This commit updates torture.rst with wordsmithing and the addition of a few more scripts. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* doc: Update stallwarn.rstPaul E. McKenney2023-01-051-18/+25
| | | | | | | This commit updates stallwarn.rst to reflect RCU additions and changes over the past few years. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* doc: Update rcu.rstPaul E. McKenney2023-01-051-1/+2
| | | | | | | This commit provides a couple of updates based on the inexorable passage of time. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* doc: Update and wordsmith rculist_nulls.rstPaul E. McKenney2023-01-051-55/+54
| | | | | | Do some wordsmithing and breaking up of RCU readers. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* doc: Update rcu_dereference.rstPaul E. McKenney2023-01-031-5/+16
| | | | | | | This commit updates rcu_dereference.rst to reflect RCU additions and changes over the past few years Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* doc: Update rcubarrier.rstPaul E. McKenney2023-01-031-86/+110
| | | | | | | | | This commit updates rcubarrier.txt to reflect RCU additions and changes over the past few years. [ paulmck: Apply Stephen Rothwell feedback. ] Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* doc: Update NMI-RCU.rstPaul E. McKenney2023-01-031-2/+2
| | | | | | | This commit updates NMI-RCU.rst to highlight the ancient heritage of the example code and to discourage wanton compiler "optimizations". Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* doc: Further updates to RCU's lockdep.rstPaul E. McKenney2023-01-031-7/+6
| | | | | | This commit wordsmiths RCU's lockdep.rst. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* Merge tag 'timers-core-2022-12-10' of ↵Linus Torvalds2022-12-121-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer updates from Thomas Gleixner: "Updates for timers, timekeeping and drivers: Core: - The timer_shutdown[_sync]() infrastructure: Tearing down timers can be tedious when there are circular dependencies to other things which need to be torn down. A prime example is timer and workqueue where the timer schedules work and the work arms the timer. What needs to prevented is that pending work which is drained via destroy_workqueue() does not rearm the previously shutdown timer. Nothing in that shutdown sequence relies on the timer being functional. The conclusion was that the semantics of timer_shutdown_sync() should be: - timer is not enqueued - timer callback is not running - timer cannot be rearmed Preventing the rearming of shutdown timers is done by discarding rearm attempts silently. A warning for the case that a rearm attempt of a shutdown timer is detected would not be really helpful because it's entirely unclear how it should be acted upon. The only way to address such a case is to add 'if (in_shutdown)' conditionals all over the place. This is error prone and in most cases of teardown not required all. - The real fix for the bluetooth HCI teardown based on timer_shutdown_sync(). A larger scale conversion to timer_shutdown_sync() is work in progress. - Consolidation of VDSO time namespace helper functions - Small fixes for timer and timerqueue Drivers: - Prevent integer overflow on the XGene-1 TVAL register which causes an never ending interrupt storm. - The usual set of new device tree bindings - Small fixes and improvements all over the place" * tag 'timers-core-2022-12-10' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (34 commits) dt-bindings: timer: renesas,cmt: Add r8a779g0 CMT support dt-bindings: timer: renesas,tmu: Add r8a779g0 support clocksource/drivers/arm_arch_timer: Use kstrtobool() instead of strtobool() clocksource/drivers/timer-ti-dm: Fix missing clk_disable_unprepare in dmtimer_systimer_init_clock() clocksource/drivers/timer-ti-dm: Clear settings on probe and free clocksource/drivers/timer-ti-dm: Make timer_get_irq static clocksource/drivers/timer-ti-dm: Fix warning for omap_timer_match clocksource/drivers/arm_arch_timer: Fix XGene-1 TVAL register math error clocksource/drivers/timer-npcm7xx: Enable timer 1 clock before use dt-bindings: timer: nuvoton,npcm7xx-timer: Allow specifying all clocks dt-bindings: timer: rockchip: Add rockchip,rk3128-timer clockevents: Repair kernel-doc for clockevent_delta2ns() clocksource/drivers/ingenic-ost: Define pm functions properly in platform_driver struct clocksource/drivers/sh_cmt: Access registers according to spec vdso/timens: Refactor copy-pasted find_timens_vvar_page() helper into one copy Bluetooth: hci_qca: Fix the teardown problem for real timers: Update the documentation to reflect on the new timer_shutdown() API timers: Provide timer_shutdown[_sync]() timers: Add shutdown mechanism to the internal functions timers: Split [try_to_]del_timer[_sync]() to prepare for shutdown mode ...
| * timers: Update the documentation to reflect on the new timer_shutdown() APISteven Rostedt (Google)2022-11-241-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In order to make sure that a timer is not re-armed after it is stopped before freeing, a new shutdown state is added to the timer code. The API timer_shutdown_sync() and timer_shutdown() must be called before the object that holds the timer can be freed. Update the documentation to reflect this new workflow. [ tglx: Updated to the new semantics and updated the zh_CN version ] Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Jacob Keller <jacob.e.keller@intel.com> Reviewed-by: Anna-Maria Behnsen <anna-maria@linutronix.de> Link: https://lore.kernel.org/r/20221110064147.712934793@goodmis.org Link: https://lore.kernel.org/r/20221123201625.375284489@linutronix.de
| * Documentation: Replace del_timer/del_timer_sync()Thomas Gleixner2022-11-241-1/+1
| | | | | | | | | | | | | | | | | | | | | | Adjust to the new preferred function names. Suggested-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Jacob Keller <jacob.e.keller@intel.com> Reviewed-by: Anna-Maria Behnsen <anna-maria@linutronix.de> Link: https://lore.kernel.org/r/20221123201625.075320635@linutronix.de
* | doc: Update RCU's lockdep.rstPaul E. McKenney2022-10-201-0/+4
| | | | | | | | | | | | This commit adds a couple of new functions to the documentation. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* | doc: Update listRCU.rstPaul E. McKenney2022-10-201-71/+103
| | | | | | | | | | | | | | | | | | This commit updates listRCU.txt to reflect RCU additions and changes over the past few years. [ paulmck: Apply kernel test robot feedback. ] Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* | doc: Update checklist.txtPaul E. McKenney2022-10-181-101/+143
| | | | | | | | | | | | | | This commit updates checklist.txt to reflect RCU additions and changes over the past few years. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* | doc: Remove arrayRCU.rstPaul E. McKenney2022-10-182-166/+0
|/ | | | | | | | | | | | | | | | | | | | | Although RCU can in theory be used to protect array indexes in a manner similar to the way it protects pointers, doing so is extremely risky because of the huge number of optimizations that modern compilers can apply to integral types. For but one example, if your code can be configured such that your array contains only a single element, then indexing that array with any integer other than zero invokes undefined behavior, which in turn means that the compiler is within its rights to assume (without checking!) that any integer used as an index to that array has the value zero. Therefore, the compiler can index the array with the constant zero, which breaks any dependencies that might have otherwise existed between the time the actual value was loaded and the time that the array was indexed. This commit therefore removes the arrayRCU.rst file that describes how to go about carrying dependencies through array indexes. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
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