Merge master.kernel.org:/home/rmk/linux-2.6-arm

[linux-2.6] / kernel / lockdep_proc.c

diff --git a/kernel/lockdep_proc.c b/kernel/lockdep_proc.c
index 14d052c8a83538114faf68b166e99d6733ac7068..fa19aee604c28233822701ac5f86bcb288ffe239 100644 (file)
--- a/kernel/lockdep_proc.c
+++ b/kernel/lockdep_proc.c
@@ -63,34 +63,6 @@ static void l_stop(struct seq_file *m, void *v)
 {
 }
 
-static unsigned long count_forward_deps(struct lock_class *class)
-{
-       struct lock_list *entry;
-       unsigned long ret = 1;
-
-       /*
-        * Recurse this class's dependency list:
-        */
-       list_for_each_entry(entry, &class->locks_after, entry)
-               ret += count_forward_deps(entry->class);
-
-       return ret;
-}
-
-static unsigned long count_backward_deps(struct lock_class *class)
-{
-       struct lock_list *entry;
-       unsigned long ret = 1;
-
-       /*
-        * Recurse this class's dependency list:
-        */
-       list_for_each_entry(entry, &class->locks_before, entry)
-               ret += count_backward_deps(entry->class);
-
-       return ret;
-}
-
 static void print_name(struct seq_file *m, struct lock_class *class)
 {
        char str[128];
@@ -124,10 +96,10 @@ 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 = count_forward_deps(class);
+       nr_forward_deps = lockdep_count_forward_deps(class);
        seq_printf(m, " FD:%5ld", nr_forward_deps);
 
-       nr_backward_deps = count_backward_deps(class);
+       nr_backward_deps = lockdep_count_backward_deps(class);
        seq_printf(m, " BD:%5ld", nr_backward_deps);
 
        get_usage_chars(class, &c1, &c2, &c3, &c4);
@@ -178,6 +150,7 @@ static const struct file_operations proc_lockdep_operations = {
        .release        = seq_release,
 };
 
+#ifdef CONFIG_PROVE_LOCKING
 static void *lc_next(struct seq_file *m, void *v, loff_t *pos)
 {
        struct lock_chain *chain;
@@ -228,6 +201,9 @@ static int lc_show(struct seq_file *m, void *v)
 
        for (i = 0; i < chain->depth; i++) {
                class = lock_chain_get_class(chain, i);
+               if (!class->key)
+                       continue;
+
                seq_printf(m, "[%p] ", class->key);
                print_name(m, class);
                seq_puts(m, "\n");
@@ -264,6 +240,7 @@ static const struct file_operations proc_lockdep_chains_operations = {
        .llseek         = seq_lseek,
        .release        = seq_release,
 };
+#endif /* CONFIG_PROVE_LOCKING */
 
 static void lockdep_stats_debug_show(struct seq_file *m)
 {
@@ -348,7 +325,7 @@ static int lockdep_stats_show(struct seq_file *m, void *v)
                if (class->usage_mask & LOCKF_ENABLED_HARDIRQS_READ)
                        nr_hardirq_read_unsafe++;
 
-               sum_forward_deps += count_forward_deps(class);
+               sum_forward_deps += lockdep_count_forward_deps(class);
        }
 #ifdef CONFIG_DEBUG_LOCKDEP
        DEBUG_LOCKS_WARN_ON(debug_atomic_read(&nr_unused_locks) != nr_unused);
@@ -382,7 +359,7 @@ static int lockdep_stats_show(struct seq_file *m, void *v)
        seq_printf(m, " dependency chains:             %11lu [max: %lu]\n",
                        nr_lock_chains, MAX_LOCKDEP_CHAINS);
        seq_printf(m, " dependency chain hlocks:       %11d [max: %lu]\n",
-                       atomic_read(&nr_chain_hlocks), MAX_LOCKDEP_CHAIN_HLOCKS);
+                       nr_chain_hlocks, MAX_LOCKDEP_CHAIN_HLOCKS);
 #endif
 
 #ifdef CONFIG_TRACE_IRQFLAGS
@@ -750,8 +727,10 @@ static const struct file_operations proc_lock_stat_operations = {
 static int __init lockdep_proc_init(void)
 {
        proc_create("lockdep", S_IRUSR, NULL, &proc_lockdep_operations);
+#ifdef CONFIG_PROVE_LOCKING
        proc_create("lockdep_chains", S_IRUSR, NULL,
                    &proc_lockdep_chains_operations);
+#endif
        proc_create("lockdep_stats", S_IRUSR, NULL,
                    &proc_lockdep_stats_operations);