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authorPaul E. McKenney <paul.mckenney@linaro.org>2011-11-10 18:48:45 -0500
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2011-12-11 13:31:48 -0500
commit99745b6a83414006f5c1e83efaebb423b41b67ef (patch)
tree454ab3cf035a8d9a42f378066b166e8b2e6ba927 /kernel
parentc4f3060843506ba6d473ab9a0afe5bd5dc93a00d (diff)
rcu: Make RCU use the new is_idle_task() API
Change from direct comparison of ->pid with zero to is_idle_task(). Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/rcutiny.c4
-rw-r--r--kernel/rcutree.c4
2 files changed, 4 insertions, 4 deletions
diff --git a/kernel/rcutiny.c b/kernel/rcutiny.c
index 4e16ce36fa03..e5bd94954fa3 100644
--- a/kernel/rcutiny.c
+++ b/kernel/rcutiny.c
@@ -64,7 +64,7 @@ static void rcu_idle_enter_common(long long oldval)
64 return; 64 return;
65 } 65 }
66 RCU_TRACE(trace_rcu_dyntick("Start", oldval, rcu_dynticks_nesting)); 66 RCU_TRACE(trace_rcu_dyntick("Start", oldval, rcu_dynticks_nesting));
67 if (current->pid != 0) { 67 if (!is_idle_task(current)) {
68 struct task_struct *idle = idle_task(smp_processor_id()); 68 struct task_struct *idle = idle_task(smp_processor_id());
69 69
70 RCU_TRACE(trace_rcu_dyntick("Error on entry: not idle task", 70 RCU_TRACE(trace_rcu_dyntick("Error on entry: not idle task",
@@ -118,7 +118,7 @@ static void rcu_idle_exit_common(long long oldval)
118 return; 118 return;
119 } 119 }
120 RCU_TRACE(trace_rcu_dyntick("End", oldval, rcu_dynticks_nesting)); 120 RCU_TRACE(trace_rcu_dyntick("End", oldval, rcu_dynticks_nesting));
121 if (current->pid != 0) { 121 if (!is_idle_task(current)) {
122 struct task_struct *idle = idle_task(smp_processor_id()); 122 struct task_struct *idle = idle_task(smp_processor_id());
123 123
124 RCU_TRACE(trace_rcu_dyntick("Error on exit: not idle task", 124 RCU_TRACE(trace_rcu_dyntick("Error on exit: not idle task",
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index 49e0783fb200..7fb8b0e60811 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -355,7 +355,7 @@ static void rcu_idle_enter_common(struct rcu_dynticks *rdtp, long long oldval)
355 return; 355 return;
356 } 356 }
357 trace_rcu_dyntick("Start", oldval, rdtp->dynticks_nesting); 357 trace_rcu_dyntick("Start", oldval, rdtp->dynticks_nesting);
358 if (current->pid != 0) { 358 if (!is_idle_task(current)) {
359 struct task_struct *idle = idle_task(smp_processor_id()); 359 struct task_struct *idle = idle_task(smp_processor_id());
360 360
361 trace_rcu_dyntick("Error on entry: not idle task", 361 trace_rcu_dyntick("Error on entry: not idle task",
@@ -449,7 +449,7 @@ static void rcu_idle_exit_common(struct rcu_dynticks *rdtp, long long oldval)
449 smp_mb__after_atomic_inc(); /* See above. */ 449 smp_mb__after_atomic_inc(); /* See above. */
450 WARN_ON_ONCE(!(atomic_read(&rdtp->dynticks) & 0x1)); 450 WARN_ON_ONCE(!(atomic_read(&rdtp->dynticks) & 0x1));
451 trace_rcu_dyntick("End", oldval, rdtp->dynticks_nesting); 451 trace_rcu_dyntick("End", oldval, rdtp->dynticks_nesting);
452 if (current->pid != 0) { 452 if (!is_idle_task(current)) {
453 struct task_struct *idle = idle_task(smp_processor_id()); 453 struct task_struct *idle = idle_task(smp_processor_id());
454 454
455 trace_rcu_dyntick("Error on exit: not idle task", 455 trace_rcu_dyntick("Error on exit: not idle task",