|author||Paul E. McKenney <firstname.lastname@example.org>||2010-04-02 16:17:17 -0700|
|committer||Paul E. McKenney <email@example.com>||2010-05-10 11:08:34 -0700|
rcu: slim down rcutiny by removing rcu_scheduler_active and friends
TINY_RCU does not need rcu_scheduler_active unless CONFIG_DEBUG_LOCK_ALLOC. So conditionally compile rcu_scheduler_active in order to slim down rcutiny a bit more. Also gets rid of an EXPORT_SYMBOL_GPL, which is responsible for most of the slimming. Signed-off-by: Paul E. McKenney <firstname.lastname@example.org>
Diffstat (limited to 'kernel/rcutiny_plugin.h')
1 files changed, 39 insertions, 0 deletions
diff --git a/kernel/rcutiny_plugin.h b/kernel/rcutiny_plugin.h
new file mode 100644
@@ -0,0 +1,39 @@
+ * Read-Copy Update mechanism for mutual exclusion (tree-based version)
+ * Internal non-public definitions that provide either classic
+ * or preemptable semantics.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * Copyright IBM Corporation, 2009
+ * Author: Paul E. McKenney <email@example.com>
+ * During boot, we forgive RCU lockdep issues. After this function is
+ * invoked, we start taking RCU lockdep issues seriously.
+ WARN_ON(nr_context_switches() > 0);
+ rcu_scheduler_active = 1;
+#endif /* #ifdef CONFIG_DEBUG_LOCK_ALLOC */