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Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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Pull locking fix from Ingo Molnar:
 "A single fix for a locking statistics bug"

* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking/lockdep: Fix lock used or unused stats error
This commit is contained in:
Linus Torvalds 2019-07-14 11:39:21 -07:00
commit 0c85ce1354
1 changed files with 3 additions and 2 deletions
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5
kernel/locking/lockdep_proc.c
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@ -210,6 +210,7 @@ static int lockdep_stats_show(struct seq_file *m, void *v)
nr_hardirq_read_safe = 0, nr_hardirq_read_unsafe = 0,
sum_forward_deps = 0;
#ifdef CONFIG_PROVE_LOCKING
list_for_each_entry(class, &all_lock_classes, lock_entry) {
if (class->usage_mask == 0)
@ -241,12 +242,12 @@ static int lockdep_stats_show(struct seq_file *m, void *v)
if (class->usage_mask & LOCKF_ENABLED_HARDIRQ_READ)
nr_hardirq_read_unsafe++;
#ifdef CONFIG_PROVE_LOCKING
sum_forward_deps += lockdep_count_forward_deps(class);
#endif
}
#ifdef CONFIG_DEBUG_LOCKDEP
DEBUG_LOCKS_WARN_ON(debug_atomic_read(nr_unused_locks) != nr_unused);
#endif
#endif
seq_printf(m, " lock-classes: %11lu [max: %lu]\n",
nr_lock_classes, MAX_LOCKDEP_KEYS);