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| author | Ming Lei <tom.leiming@gmail.com> | 2009-04-24 23:10:06 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-04-26 18:21:24 +0200 |
| commit | 992d7ced75322307035a0e94074eb7188612a680 (patch) | |
| tree | cbbe759b02e48c379ee711ad0654965a17bcbcf2 /Documentation/lockdep-design.txt | |
| parent | b48ccb095a0c9257241261ec2bd1cbb1bdabc48b (diff) | |
| download | linux-992d7ced75322307035a0e94074eb7188612a680.tar.gz | |
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/lockdep-design.txt')
| -rw-r--r-- | Documentation/lockdep-design.txt | 6 |
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: The bit position indicates STATE, STATE-read, for each of the states listed above, and the character displayed in each indicates: - '.' acquired while irqs disabled - '+' acquired in irq context - '-' acquired with irqs enabled + '.' acquired while irqs disabled and not in irq context + '-' acquired in irq context + '+' acquired with irqs enabled '?' acquired in irq context with irqs enabled. Unused mutexes cannot be part of the cause of an error. |