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locking/lockdep,doc: Improve readability of the block matrix 

The block condition matrix is using 'E' as the writer notation,
however, the writer reminder below the matrix is using 'W', to make
them consistent and make the matrix more readable, we'd better to use
'W' to represent writer.

Suggested-by: Waiman Long <llong@redhat.com>
Suggested-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Xiongwei Song <sxwjean@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Boqun Feng <boqun.feng@gmail.com>
Link: https://lkml.kernel.org/r/1621868745-23311-1-git-send-email-sxwjean@me.com
This commit is contained in:
Xiongwei Song 2021-05-24 23:05:45 +08:00 committed by Peter Zijlstra
parent bccf1ec369
commit fab6216faf
1 changed files with 2 additions and 2 deletions
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4
Documentation/locking/lockdep-design.rst
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@ -453,9 +453,9 @@ There are simply four block conditions:
Block condition matrix, Y means the row blocks the column, and N means otherwise.
+---+---+---+---+
| | E | r | R |
| | W | r | R |
+---+---+---+---+
| E | Y | Y | Y |
| W | Y | Y | Y |
+---+---+---+---+
| r | Y | Y | N |
+---+---+---+---+