lockdep: fix build if CONFIG_PROVE_LOCKING not defined
Stephen Hemminger [Fri, 15 Aug 2008 16:33:05 +0000 (09:33 -0700)]
If CONFIG_PROVE_LOCKING not defined, then no dependency information
is available.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

kernel/lockdep_proc.c

index fa19aee..4b194d3 100644 (file)
@@ -82,7 +82,6 @@ static void print_name(struct seq_file *m, struct lock_class *class)
 
 static int l_show(struct seq_file *m, void *v)
 {
-       unsigned long nr_forward_deps, nr_backward_deps;
        struct lock_class *class = v;
        struct lock_list *entry;
        char c1, c2, c3, c4;
@@ -96,11 +95,10 @@ static int l_show(struct seq_file *m, void *v)
 #ifdef CONFIG_DEBUG_LOCKDEP
        seq_printf(m, " OPS:%8ld", class->ops);
 #endif
-       nr_forward_deps = lockdep_count_forward_deps(class);
-       seq_printf(m, " FD:%5ld", nr_forward_deps);
-
-       nr_backward_deps = lockdep_count_backward_deps(class);
-       seq_printf(m, " BD:%5ld", nr_backward_deps);
+#ifdef CONFIG_PROVE_LOCKING
+       seq_printf(m, " FD:%5ld", lockdep_count_forward_deps(class));
+       seq_printf(m, " BD:%5ld", lockdep_count_backward_deps(class));
+#endif
 
        get_usage_chars(class, &c1, &c2, &c3, &c4);
        seq_printf(m, " %c%c%c%c", c1, c2, c3, c4);
@@ -325,7 +323,9 @@ static int lockdep_stats_show(struct seq_file *m, void *v)
                if (class->usage_mask & LOCKF_ENABLED_HARDIRQS_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);