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Subject[tip:locking/core] Documentation/locking/lockdep: Update info about states
Commit-ID:  e5684bbfc3f03480d6ba2150f133630fb510d3eb
Gitweb: https://git.kernel.org/tip/e5684bbfc3f03480d6ba2150f133630fb510d3eb
Author: Juri Lelli <juri.lelli@redhat.com>
AuthorDate: Tue, 13 Feb 2018 19:55:18 +0100
Committer: Ingo Molnar <mingo@kernel.org>
CommitDate: Wed, 14 Feb 2018 12:01:22 +0100

Documentation/locking/lockdep: Update info about states

Commit:

d92a8cfcb37e ("locking/lockdep: Rework FS_RECLAIM annotation")

removed the 'reclaim_fs' lockdep STATE.

Reflect the change in the documentation.

While we are at it, also clarify the formula to calculate the number of state bits.

Signed-off-by: Juri Lelli <juri.lelli@redhat.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-doc@vger.kernel.org
Link: http://lkml.kernel.org/r/20180213185519.18186-2-juri.lelli@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
Documentation/locking/lockdep-design.txt | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/locking/lockdep-design.txt b/Documentation/locking/lockdep-design.txt
index 9de1c15..e341c2f 100644
--- a/Documentation/locking/lockdep-design.txt
+++ b/Documentation/locking/lockdep-design.txt
@@ -27,7 +27,8 @@ lock-class.
State
-----

-The validator tracks lock-class usage history into 4n + 1 separate state bits:
+The validator tracks lock-class usage history into 4 * nSTATEs + 1 separate
+state bits:

- 'ever held in STATE context'
- 'ever held as readlock in STATE context'
@@ -37,7 +38,6 @@ The validator tracks lock-class usage history into 4n + 1 separate state bits:
Where STATE can be either one of (kernel/locking/lockdep_states.h)
- hardirq
- softirq
- - reclaim_fs

- 'ever used' [ == !unused ]

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