linux-kernel - [PATCH-tip 0/3] locking/lockdep: Cleaning up lockdep code

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Message-Id: <20200212153828.346-1-longman@redhat.com>
Date:   Wed, 12 Feb 2020 10:38:25 -0500
From:   Waiman Long <longman@...hat.com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Will Deacon <will.deacon@....com>
Cc:     linux-kernel@...r.kernel.org, Bart Van Assche <bvanassche@....org>,
        Waiman Long <longman@...hat.com>
Subject: [PATCH-tip 0/3] locking/lockdep: Cleaning up lockdep code

The following conditional compilation macros are used throughout the
lockdep code making it hard to understand.
 - CONFIG_PROVE_LOCKING
 - CONFIG_LOCK_STAT
 - CONFIG_DEBUG_LOCKDEP
 - CONFIG_LOCKDEP_SMALL
 - CONFIG_TRACE_IRQFLAGS

In particular, almost half of the code is for CONFIG_PROVE_LOCKING and
there are several blocks of them in lockdep.c. It is very hard to see if
a function is for CONFIG_PROVE_LOCKING or not.

This patchset cleans up this mess by putting all the CONFIG_PROVE_LOCKING
functions into a separate lockdep_prove.c file making it easier to know
what they are for. It also consolidates the CONFIG_DEBUG_LOCKDEP code
to a certain extend.

This is a code relocation patchset. There is no functional change.

Waiman Long (3):
  locking/lockdep: Make remove_class_from_lock_chains() depend on
    CONFIG_PROVE_LOCKING
  locking/lockdep: Extract CONFIG_PROVE_LOCKING code out to
    lockdep_prove.c
  locking/lockdep: Consolidate CONFIG_DEBUG_LOCKDEP code

 kernel/locking/lockdep.c       | 3300 +++-----------------------------
 kernel/locking/lockdep_prove.c | 2820 +++++++++++++++++++++++++++
 2 files changed, 3066 insertions(+), 3054 deletions(-)
 create mode 100644 kernel/locking/lockdep_prove.c

-- 
2.18.1