linux-kernel - [PATCH 0/9] Lock ordering documentation and annotation for lockdep

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Date:   Fri, 13 Mar 2020 18:46:52 +0100
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     linux-kernel@...r.kernel.org
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>, Will Deacon <will@...nel.org>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        Joel Fernandes <joel@...lfernandes.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH 0/9] Lock ordering documentation and annotation for lockdep

The first patch introduces the long asked locking documentation
regarding spinlock_t vs raw_spinlock_t (and other locking primitives).
Followed by updates to obey the rules including a change to completions
to use struct swait_queue_head instead of wait_queue_head_t.

It ends with lockdep updates to recognize the "bad" lock nesting. This
new lockdep feature is activated by CONFIG_PROVE_RAW_LOCK_NESTING. Once
enabled it will report for instance printk, the memory allocator or the
workqueue implementation. This is known and it is worked on.

Sebastian