V4L/DVB (8960): drivers/media/video/cafe_ccic.c needs mm.h

[linux-2.6-omap-h63xx.git] / kernel / lockdep_proc.c

diff --git a/kernel/lockdep_proc.c b/kernel/lockdep_proc.c
index dc5d29648d852ccadd88ea79a91decc93653fa8b..20dbcbf9c7dd2cf34486f3e9f307f1e3cf8a97bc 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];
@@ -110,7 +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;
@@ -124,11 +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 = count_forward_deps(class);
-       seq_printf(m, " FD:%5ld", nr_forward_deps);
-
-       nr_backward_deps = 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);
@@ -139,7 +109,7 @@ static int l_show(struct seq_file *m, void *v)
 
        list_for_each_entry(entry, &class->locks_after, entry) {
                if (entry->distance == 1) {
-                       seq_printf(m, " -> [%p] ", entry->class);
+                       seq_printf(m, " -> [%p] ", entry->class->key);
                        print_name(m, entry->class);
                        seq_puts(m, "\n");
                }
@@ -178,6 +148,98 @@ 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;
+
+       (*pos)++;
+
+       if (v == SEQ_START_TOKEN)
+               chain = m->private;
+       else {
+               chain = v;
+
+               if (*pos < nr_lock_chains)
+                       chain = lock_chains + *pos;
+               else
+                       chain = NULL;
+       }
+
+       return chain;
+}
+
+static void *lc_start(struct seq_file *m, loff_t *pos)
+{
+       if (*pos == 0)
+               return SEQ_START_TOKEN;
+
+       if (*pos < nr_lock_chains)
+               return lock_chains + *pos;
+
+       return NULL;
+}
+
+static void lc_stop(struct seq_file *m, void *v)
+{
+}
+
+static int lc_show(struct seq_file *m, void *v)
+{
+       struct lock_chain *chain = v;
+       struct lock_class *class;
+       int i;
+
+       if (v == SEQ_START_TOKEN) {
+               seq_printf(m, "all lock chains:\n");
+               return 0;
+       }
+
+       seq_printf(m, "irq_context: %d\n", chain->irq_context);
+
+       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");
+       }
+       seq_puts(m, "\n");
+
+       return 0;
+}
+
+static const struct seq_operations lockdep_chains_ops = {
+       .start  = lc_start,
+       .next   = lc_next,
+       .stop   = lc_stop,
+       .show   = lc_show,
+};
+
+static int lockdep_chains_open(struct inode *inode, struct file *file)
+{
+       int res = seq_open(file, &lockdep_chains_ops);
+       if (!res) {
+               struct seq_file *m = file->private_data;
+
+               if (nr_lock_chains)
+                       m->private = lock_chains;
+               else
+                       m->private = NULL;
+       }
+       return res;
+}
+
+static const struct file_operations proc_lockdep_chains_operations = {
+       .open           = lockdep_chains_open,
+       .read           = seq_read,
+       .llseek         = seq_lseek,
+       .release        = seq_release,
+};
+#endif /* CONFIG_PROVE_LOCKING */
+
 static void lockdep_stats_debug_show(struct seq_file *m)
 {
 #ifdef CONFIG_DEBUG_LOCKDEP
@@ -261,7 +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++;
 
-               sum_forward_deps += count_forward_deps(class);
+#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);
@@ -294,6 +358,8 @@ static int lockdep_stats_show(struct seq_file *m, void *v)
 #ifdef CONFIG_PROVE_LOCKING
        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",
+                       nr_chain_hlocks, MAX_LOCKDEP_CHAIN_HLOCKS);
 #endif
 
 #ifdef CONFIG_TRACE_IRQFLAGS
@@ -406,8 +472,9 @@ static void snprint_time(char *buf, size_t bufsiz, s64 nr)
 {
        unsigned long rem;
 
+       nr += 5; /* for display rounding */
        rem = do_div(nr, 1000); /* XXX: do_div_signed */
-       snprintf(buf, bufsiz, "%lld.%02d", (long long)nr, ((int)rem+5)/10);
+       snprintf(buf, bufsiz, "%lld.%02d", (long long)nr, (int)rem/10);
 }
 
 static void seq_time(struct seq_file *m, s64 time)
@@ -661,6 +728,10 @@ 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);