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locking/lockdep: Update obsolete struct field description

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The lock_chain struct definition has outdated comment, update it and add
struct member description.

Signed-off-by: Yuyang Du <duyuyang@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: bvanassche@acm.org
Cc: frederic@kernel.org
Cc: ming.lei@redhat.com
Cc: will.deacon@arm.com
Link: https://lkml.kernel.org/r/20190506081939.74287-7-duyuyang@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Yuyang Du 2019-05-06 16:19:22 +08:00 committed by Ingo Molnar
parent 834494b280
commit d16dbd1b8a
1 changed files with 9 additions and 3 deletions
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12
include/linux/lockdep.h
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@ -203,11 +203,17 @@ struct lock_list {
struct lock_list *parent;
};
/*
* We record lock dependency chains, so that we can cache them:
/**
* struct lock_chain - lock dependency chain record
*
* @irq_context: the same as irq_context in held_lock below
* @depth: the number of held locks in this chain
* @base: the index in chain_hlocks for this chain
* @entry: the collided lock chains in lock_chain hash list
* @chain_key: the hash key of this lock_chain
*/
struct lock_chain {
/* see BUILD_BUG_ON()s in lookup_chain_cache() */
/* see BUILD_BUG_ON()s in add_chain_cache() */
unsigned int irq_context : 2,
depth : 6,
base : 24;