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locking/lockdep: Factor out the validate_held_lock() helper function 

Behaviour should not change.

Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1486053497-9948-2-git-send-email-hooanon05g@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
J. R. Okajima 2017-02-03 01:38:16 +09:00 committed by Ingo Molnar
parent 41c2c5b86a
commit e969970be0
1 changed files with 22 additions and 18 deletions
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40
kernel/locking/lockdep.c
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@ -3473,6 +3473,24 @@ static struct held_lock *find_held_lock(struct task_struct *curr,
return ret;
}
static int reacquire_held_locks(struct task_struct *curr, unsigned int depth,
int idx)
{
struct held_lock *hlock;
for (hlock = curr->held_locks + idx; idx < depth; idx++, hlock++) {
if (!__lock_acquire(hlock->instance,
hlock_class(hlock)->subclass,
hlock->trylock,
hlock->read, hlock->check,
hlock->hardirqs_off,
hlock->nest_lock, hlock->acquire_ip,
hlock->references, hlock->pin_count))
return 1;
}
return 0;
}
static int
__lock_set_class(struct lockdep_map *lock, const char *name,
struct lock_class_key *key, unsigned int subclass,
@ -3503,15 +3521,8 @@ __lock_set_class(struct lockdep_map *lock, const char *name,
curr->lockdep_depth = i;
curr->curr_chain_key = hlock->prev_chain_key;
for (; i < depth; i++) {
hlock = curr->held_locks + i;
if (!__lock_acquire(hlock->instance,
hlock_class(hlock)->subclass, hlock->trylock,
hlock->read, hlock->check, hlock->hardirqs_off,
hlock->nest_lock, hlock->acquire_ip,
hlock->references, hlock->pin_count))
return 0;
}
if (reacquire_held_locks(curr, depth, i))
return 0;
/*
* I took it apart and put it back together again, except now I have
@ -3582,15 +3593,8 @@ __lock_release(struct lockdep_map *lock, int nested, unsigned long ip)
curr->lockdep_depth = i;
curr->curr_chain_key = hlock->prev_chain_key;
for (i++; i < depth; i++) {
hlock = curr->held_locks + i;
if (!__lock_acquire(hlock->instance,
hlock_class(hlock)->subclass, hlock->trylock,
hlock->read, hlock->check, hlock->hardirqs_off,
hlock->nest_lock, hlock->acquire_ip,
hlock->references, hlock->pin_count))
return 0;
}
if (reacquire_held_locks(curr, depth, i + 1))
return 0;
/*
* We had N bottles of beer on the wall, we drank one, but now