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authorMing Lei <tom.leiming@gmail.com>2009-04-24 11:10:06 -0400
committerIngo Molnar <mingo@elte.hu>2009-04-26 12:21:24 -0400
commit992d7ced75322307035a0e94074eb7188612a680 (patch)
treecbbe759b02e48c379ee711ad0654965a17bcbcf2 /Documentation
parentb48ccb095a0c9257241261ec2bd1cbb1bdabc48b (diff)
locking: Documentation: lockdep-design.txt, fix note of state bits
From source code of get_usage_char(), the previous note is not correct, so fix it. static char get_usage_char(struct lock_class *class, enum lock_usage_bit bit) { char c = '.'; if (class->usage_mask & lock_flag(bit + 2))/*LOCK_ENABLED_##STATE*/ c = '+'; if (class->usage_mask & lock_flag(bit)) {/*LOCK_USED_IN_##STATE*/ c = '-'; if (class->usage_mask & lock_flag(bit + 2)) c = '?'; } return c; } note: 1) The 'bit' parameter always is passed as LOCK_USED_IN_##STATE or LOCK_USED_IN_##STATE_READ , from get_usage_chars(). Signed-off-by: Ming Lei <tom.leiming@gmail.com> LKML-Reference: <1240585806-5744-1-git-send-email-tom.leiming@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/lockdep-design.txt6
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/lockdep-design.txt b/Documentation/lockdep-design.txt
index 938ea22f2cc0..e20d913d5914 100644
--- a/Documentation/lockdep-design.txt
+++ b/Documentation/lockdep-design.txt
@@ -54,9 +54,9 @@ locking error messages, inside curlies. A contrived example:
54The bit position indicates STATE, STATE-read, for each of the states listed 54The bit position indicates STATE, STATE-read, for each of the states listed
55above, and the character displayed in each indicates: 55above, and the character displayed in each indicates:
56 56
57 '.' acquired while irqs disabled 57 '.' acquired while irqs disabled and not in irq context
58 '+' acquired in irq context 58 '-' acquired in irq context
59 '-' acquired with irqs enabled 59 '+' acquired with irqs enabled
60 '?' acquired in irq context with irqs enabled. 60 '?' acquired in irq context with irqs enabled.
61 61
62Unused mutexes cannot be part of the cause of an error. 62Unused mutexes cannot be part of the cause of an error.