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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2013-08-31 19:23:29 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2013-09-23 09:15:27 -0700
commit289828e62de0334a0d01c0f65df91cd47d3a9e05 (patch)
tree8bda5b11aa9e8bfcd2e176b7e12b365bfa7b79fe /kernel
parentc9d4b0af9e0609cc525c55de18229fde7c926d61 (diff)
downloadop-kernel-dev-289828e62de0334a0d01c0f65df91cd47d3a9e05.zip
op-kernel-dev-289828e62de0334a0d01c0f65df91cd47d3a9e05.tar.gz
rcu: Silence unused-variable warnings
The "idle" variable in both rcu_eqs_enter_common() and rcu_eqs_exit_common() is only used in a WARN_ON_ONCE(). If the kernel is built disabling WARN_ON_ONCE(), the compiler will complain (rightly) that "idle" is unused. This commit therefore adds a __maybe_unused to the declaration of both variables. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/rcutree.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index 8eb9cfd..e6f2e8f 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -371,7 +371,8 @@ static void rcu_eqs_enter_common(struct rcu_dynticks *rdtp, long long oldval,
{
trace_rcu_dyntick(TPS("Start"), oldval, rdtp->dynticks_nesting);
if (!user && !is_idle_task(current)) {
- struct task_struct *idle = idle_task(smp_processor_id());
+ struct task_struct *idle __maybe_unused =
+ idle_task(smp_processor_id());
trace_rcu_dyntick(TPS("Error on entry: not idle task"), oldval, 0);
ftrace_dump(DUMP_ORIG);
@@ -508,7 +509,8 @@ static void rcu_eqs_exit_common(struct rcu_dynticks *rdtp, long long oldval,
rcu_cleanup_after_idle(smp_processor_id());
trace_rcu_dyntick(TPS("End"), oldval, rdtp->dynticks_nesting);
if (!user && !is_idle_task(current)) {
- struct task_struct *idle = idle_task(smp_processor_id());
+ struct task_struct *idle __maybe_unused =
+ idle_task(smp_processor_id());
trace_rcu_dyntick(TPS("Error on exit: not idle task"),
oldval, rdtp->dynticks_nesting);
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