Commit 5fcce743 authored by Aneesh Kumar's avatar Aneesh Kumar Committed by Linus Torvalds
Browse files

[PATCH] fix lockdep-design.txt

I was looking at lockdep-desing.txt and i guess i am confused with the
changes with respect to fd7bcea3

. It
says

+   '.'  acquired while irqs enabled
+   '+'  acquired in irq context
+   '-'  acquired in process context with irqs disabled
+   '?'  read-acquired both with irqs enabled and in irq context
+

But the get_usage_chars() function does this for '-'
 if (class->usage_mask & LOCKF_ENABLED_HARDIRQS)
                        *c1 = '-';

So i guess what would be correct would be
'.'  acquired while irqs disabled
'+'  acquired in irq context
'-'  acquired with irqs enabled
'?' read acquired in irq context with irqs enabled.

Acked-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 3dc3099a
...@@ -50,10 +50,10 @@ The bit position indicates hardirq, softirq, hardirq-read, ...@@ -50,10 +50,10 @@ The bit position indicates hardirq, softirq, hardirq-read,
softirq-read respectively, and the character displayed in each softirq-read respectively, and the character displayed in each
indicates: indicates:
'.' acquired while irqs enabled '.' acquired while irqs disabled
'+' acquired in irq context '+' acquired in irq context
'-' acquired in process context with irqs disabled '-' acquired with irqs enabled
'?' read-acquired both with irqs enabled and in irq context '?' read acquired in irq context with irqs enabled.
Unused mutexes cannot be part of the cause of an error. Unused mutexes cannot be part of the cause of an error.
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