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yaml --- r: 19669 b: refs/heads/master c: bb3b9cf h: refs/heads/master i: 19667: 1d148cf v: v3
git-mirror · Feb 3, 2006 · 652f085 · 652f085
1 parent 193511e
commit 652f085
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Showing 2 changed files with 5 additions and 2 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 9d9c0531c91755a90b646b27bb722d59ee3eb46d
+refs/heads/master: bb3b9cf122eb097ed9fe8ae50e1b0dbba9bbe447
diff --git a/trunk/include/linux/rcupdate.h b/trunk/include/linux/rcupdate.h
@@ -240,11 +240,14 @@ extern int rcu_pending(int cpu);
  * This means that all preempt_disable code sequences, including NMI and
  * hardware-interrupt handlers, in progress on entry will have completed
  * before this primitive returns.  However, this does not guarantee that
- * softirq handlers will have completed, since in some kernels
+ * softirq handlers will have completed, since in some kernels, these
+ * handlers can run in process context, and can block.
  *
  * This primitive provides the guarantees made by the (deprecated)
  * synchronize_kernel() API.  In contrast, synchronize_rcu() only
  * guarantees that rcu_read_lock() sections will have completed.
+ * In "classic RCU", these two guarantees happen to be one and
+ * the same, but can differ in realtime RCU implementations.
  */
 #define synchronize_sched() synchronize_rcu()