linux-toradex.git/Documentation/lockdep-design.txt, branch v3.4.45

lockdep: Update documentation for lock-class leak detection

2011-12-11T18:31:23+00:00

There are a number of bugs that can leak or overuse lock classes,
which can cause the maximum number of lock classes (currently 8191)
to be exceeded.  However, the documentation does not tell you how to
track down these problems.  This commit addresses this shortcoming.

Signed-off-by: Paul E. McKenney

lockdep: Fix typos in documentation

2009-08-07T10:03:46+00:00

s/head/held

Signed-off-by: Li Zefan 
Cc: Peter Zijlstra 
LKML-Reference: <4A7BD37E.9060806@cn.fujitsu.com>
Signed-off-by: Ingo Molnar

locking: Documentation: lockdep-design.txt, fix note of state bits

2009-04-26T16:21:24+00:00

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 
LKML-Reference: <1240585806-5744-1-git-send-email-tom.leiming@gmail.com>
Signed-off-by: Ingo Molnar

lockdep: get_user_chars() redo

2009-02-14T22:28:22+00:00

Generic, states independent, get_user_chars().

Signed-off-by: Peter Zijlstra 
Signed-off-by: Ingo Molnar

[PATCH] fix lockdep-design.txt

2006-10-11T18:14:24+00:00

I was looking at lockdep-desing.txt and i guess i am confused with the
changes with respect to fd7bcea35e7efb108c34ee2b3840942a3749cadb. 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: Ingo Molnar 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Fix typos in Documentation/: 'N'-'P'

2006-10-03T20:52:05+00:00

This patch fixes typos in various Documentation txts. The patch addresses
some words starting with the letters 'N'-'P'.

Signed-off-by: Matt LaPlante 
Acked-by: Randy Dunlap 
Signed-off-by: Adrian Bunk

Fix typos in Documentation/: 'H'-'M'

2006-10-03T20:50:39+00:00

This patch fixes typos in various Documentation txts. The patch addresses
some words starting with the letters 'H'-'M'.

Signed-off-by: Matt LaPlante 
Acked-by: Randy Dunlap 
Signed-off-by: Adrian Bunk

Fix typos in Documentation/: 'F'-'G'

2006-10-03T20:49:15+00:00

This patch fixes typos in various Documentation txts. The patch addresses
some words starting with the letters 'F'-'G'.

Signed-off-by: Matt LaPlante 
Signed-off-by: Adrian Bunk

[PATCH] Doc/lockdep-design: explain display of {state-bits}

2006-10-01T07:39:21+00:00

Signed-off-by: Jim Cromie 
Cc: Ingo Molnar 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] lockdep: design docs

2006-07-03T22:27:04+00:00

Lock validator design documentation.

Signed-off-by: Ingo Molnar 
Signed-off-by: Arjan van de Ven 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds