X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=kernel%2Frcupdate.c;h=f436993bd590a4b0bb145d4402d52cb2aaeb7c76;hb=826509f8110049663799bc20f2b5b6170e2f78ca;hp=ad497722f04ff0c95fa65eb01917cd7b21bd08ec;hpb=66cf8f1443301a1d5bc9c21709e4264e6919a3e1;p=linux-2.6-omap-h63xx.git

diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c
index ad497722f04..f436993bd59 100644
--- a/kernel/rcupdate.c
+++ b/kernel/rcupdate.c
@@ -444,15 +444,18 @@ static void wakeme_after_rcu(struct rcu_head  *head)
 }
 
 /**
- * synchronize_kernel - wait until a grace period has elapsed.
+ * synchronize_rcu - wait until a grace period has elapsed.
  *
  * Control will return to the caller some time after a full grace
  * period has elapsed, in other words after all currently executing RCU
  * read-side critical sections have completed.  RCU read-side critical
  * sections are delimited by rcu_read_lock() and rcu_read_unlock(),
  * and may be nested.
+ *
+ * If your read-side code is not protected by rcu_read_lock(), do -not-
+ * use synchronize_rcu().
  */
-void synchronize_kernel(void)
+void synchronize_rcu(void)
 {
 	struct rcu_synchronize rcu;
 
@@ -464,7 +467,16 @@ void synchronize_kernel(void)
 	wait_for_completion(&rcu.completion);
 }
 
+/*
+ * Deprecated, use synchronize_rcu() or synchronize_sched() instead.
+ */
+void synchronize_kernel(void)
+{
+	synchronize_rcu();
+}
+
 module_param(maxbatch, int, 0);
 EXPORT_SYMBOL(call_rcu);  /* WARNING: GPL-only in April 2006. */
 EXPORT_SYMBOL(call_rcu_bh);  /* WARNING: GPL-only in April 2006. */
+EXPORT_SYMBOL_GPL(synchronize_rcu);
 EXPORT_SYMBOL(synchronize_kernel);  /* WARNING: GPL-only in April 2006. */