aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorPaul E. McKenney <paulmck@us.ibm.com>2006-02-03 03:04:38 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-03 08:32:09 -0800
commitbb3b9cf122eb097ed9fe8ae50e1b0dbba9bbe447 (patch)
tree4032cc19712ff78f532d2071f15a317e026da15b
parent9d9c0531c91755a90b646b27bb722d59ee3eb46d (diff)
[PATCH] Fix comment to synchronize_sched()
Fix to broken comment to synchronize_rcu() noted by Keith Owens. Also add sentence noting that synchronize_sched() and synchronize_rcu() are not necessarily identical. Signed-off-by: Paul E. McKenney <paulmck@us.ibm.com> Cc: Keith Owens <kaos@sgi.com> Cc: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--include/linux/rcupdate.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index 981f9aa4335..b87aefa082e 100644
--- a/include/linux/rcupdate.h
+++ b/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()