diff options
author | Bart Van Assche <bvanassche@acm.org> | 2019-02-14 15:00:48 -0800 |
---|---|---|
committer | Ingo Molnar <mingo@kernel.org> | 2019-02-28 07:55:44 +0100 |
commit | 2212684adff79e2704a2792ff46682afb9246fc8 (patch) | |
tree | 1231355762643529210b01070bb095922968b826 /kernel/locking/lockdep.c | |
parent | ace35a7ac493d4284a57ad807579011bebba891c (diff) |
locking/lockdep: Introduce lockdep_next_lockchain() and lock_chain_count()
This patch does not change any functionality but makes the next patch in
this series easier to read.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Johannes Berg <johannes@sipsolutions.net>
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>
Cc: Waiman Long <longman@redhat.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: johannes.berg@intel.com
Cc: tj@kernel.org
Link: https://lkml.kernel.org/r/20190214230058.196511-14-bvanassche@acm.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/locking/lockdep.c')
-rw-r--r-- | kernel/locking/lockdep.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c index 2c6d0b67e7b6..753a9b758266 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -2096,7 +2096,7 @@ out_bug: return 0; } -unsigned long nr_lock_chains; +static unsigned long nr_lock_chains; struct lock_chain lock_chains[MAX_LOCKDEP_CHAINS]; int nr_chain_hlocks; static u16 chain_hlocks[MAX_LOCKDEP_CHAIN_HLOCKS]; @@ -2231,6 +2231,20 @@ static int check_no_collision(struct task_struct *curr, } /* + * Given an index that is >= -1, return the index of the next lock chain. + * Return -2 if there is no next lock chain. + */ +long lockdep_next_lockchain(long i) +{ + return i + 1 < nr_lock_chains ? i + 1 : -2; +} + +unsigned long lock_chain_count(void) +{ + return nr_lock_chains; +} + +/* * Adds a dependency chain into chain hashtable. And must be called with * graph_lock held. * |