Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6
[linux-2.6.git] / lib / dynamic_debug.c
index a687d90..3094318 100644 (file)
 #include <linux/dynamic_debug.h>
 #include <linux/debugfs.h>
 #include <linux/slab.h>
+#include <linux/jump_label.h>
 
 extern struct _ddebug __start___verbose[];
 extern struct _ddebug __stop___verbose[];
 
-/* dynamic_debug_enabled, and dynamic_debug_enabled2 are bitmasks in which
- * bit n is set to 1 if any modname hashes into the bucket n, 0 otherwise. They
- * use independent hash functions, to reduce the chance of false positives.
- */
-long long dynamic_debug_enabled;
-EXPORT_SYMBOL_GPL(dynamic_debug_enabled);
-long long dynamic_debug_enabled2;
-EXPORT_SYMBOL_GPL(dynamic_debug_enabled2);
-
 struct ddebug_table {
        struct list_head link;
        char *mod_name;
@@ -88,26 +80,6 @@ static char *ddebug_describe_flags(struct _ddebug *dp, char *buf,
 }
 
 /*
- * must be called with ddebug_lock held
- */
-
-static int disabled_hash(char hash, bool first_table)
-{
-       struct ddebug_table *dt;
-       char table_hash_value;
-
-       list_for_each_entry(dt, &ddebug_tables, link) {
-               if (first_table)
-                       table_hash_value = dt->ddebugs->primary_hash;
-               else
-                       table_hash_value = dt->ddebugs->secondary_hash;
-               if (dt->num_enabled && (hash == table_hash_value))
-                       return 0;
-       }
-       return 1;
-}
-
-/*
  * Search the tables for _ddebug's which match the given
  * `query' and apply the `flags' and `mask' to them.  Tells
  * the user which ddebug's were changed, or whether none
@@ -170,17 +142,9 @@ static void ddebug_change(const struct ddebug_query *query,
                                dt->num_enabled++;
                        dp->flags = newflags;
                        if (newflags) {
-                               dynamic_debug_enabled |=
-                                               (1LL << dp->primary_hash);
-                               dynamic_debug_enabled2 |=
-                                               (1LL << dp->secondary_hash);
+                               jump_label_enable(&dp->enabled);
                        } else {
-                               if (disabled_hash(dp->primary_hash, true))
-                                       dynamic_debug_enabled &=
-                                               ~(1LL << dp->primary_hash);
-                               if (disabled_hash(dp->secondary_hash, false))
-                                       dynamic_debug_enabled2 &=
-                                               ~(1LL << dp->secondary_hash);
+                               jump_label_disable(&dp->enabled);
                        }
                        if (verbose)
                                printk(KERN_INFO