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Commit e5684bbf authored by Juri Lelli's avatar Juri Lelli Committed by Ingo Molnar
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Documentation/locking/lockdep: Update info about states 



Commit:

  d92a8cfc ("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: default avatarJuri Lelli <juri.lelli@redhat.com>
Acked-by: default avatarPeter 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: default avatarIngo Molnar <mingo@kernel.org>
parent 7246a966

Documentation/locking/lockdep-design.txt

+2 −2
Original line number Diff line number Diff line
@@ -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        ]