[tip:core/rcu] rcu: Make rcupreempt_trace.c look at offline CPUs

[tip-bot for Paul E. McKenney]

Commit-ID:  b612ba804b8a656333013ad2ee96fb2377df5dbb
Gitweb:     http://git.kernel.org/tip/b612ba804b8a656333013ad2ee96fb2377df5dbb
Author:     Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
AuthorDate: Sat, 15 Aug 2009 09:53:50 -0700
Committer:  Ingo Molnar <mingo@xxxxxxx>
CommitDate: Sat, 15 Aug 2009 19:02:09 +0200

rcu: Make rcupreempt_trace.c look at offline CPUs

Given that offline CPUs can now have non-zero counters, we need
to dump counters for offline CPUs as well as for online CPUs.

Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Cc: laijs@xxxxxxxxxxxxxx
Cc: dipankar@xxxxxxxxxx
Cc: josht@xxxxxxxxxxxxxxxxxx
Cc: akpm@xxxxxxxxxxxxxxxxxxxx
Cc: mathieu.desnoyers@xxxxxxxxxx
Cc: dvhltc@xxxxxxxxxx
Cc: niv@xxxxxxxxxx
Cc: peterz@xxxxxxxxxxxxx
Cc: rostedt@xxxxxxxxxxx
Cc: hugh.dickins@xxxxxxxxxxxxx
Cc: benh@xxxxxxxxxxxxxxxxxxx
LKML-Reference: <12503552313921-git-send-email->
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>


---
 kernel/rcupreempt_trace.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/kernel/rcupreempt_trace.c b/kernel/rcupreempt_trace.c
index 7c2665c..1164034 100644
--- a/kernel/rcupreempt_trace.c
+++ b/kernel/rcupreempt_trace.c
@@ -236,12 +236,13 @@ static ssize_t rcuctrs_read(struct file *filp, char __user *buffer,
 
 	cnt += snprintf(&rcupreempt_trace_buf[cnt], RCUPREEMPT_TRACE_BUF_SIZE,
 				"CPU last cur F M\n");
-	for_each_online_cpu(cpu) {
+	for_each_possible_cpu(cpu) {
 		long *flipctr = rcupreempt_flipctr(cpu);
 		cnt += snprintf(&rcupreempt_trace_buf[cnt],
 				RCUPREEMPT_TRACE_BUF_SIZE - cnt,
-					"%3d %4ld %3ld %d %d\n",
+					"%3d%c %4ld %3ld %d %d\n",
 			       cpu,
+			       cpu_is_offline(cpu) ? '!' : ' ',
 			       flipctr[!f],
 			       flipctr[f],
 			       rcupreempt_flip_flag(cpu),
--
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