From: Paul E. McKenney Date: Fri, 3 Feb 2006 11:04:38 +0000 (-0800) Subject: [PATCH] Fix comment to synchronize_sched() X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=bb3b9cf122eb097ed9fe8ae50e1b0dbba9bbe447;p=openwrt%2Fstaging%2Fblogic.git [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 Cc: Keith Owens Cc: Stephen Hemminger Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h index 981f9aa43353..b87aefa082e2 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()