From: Paul E. McKenney Date: Thu, 10 Nov 2011 23:48:45 +0000 (-0800) Subject: rcu: Make RCU use the new is_idle_task() API X-Git-Tag: next-20111215~27^2~6^2^2~30 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=99745b6a83414006f5c1e83efaebb423b41b67ef;p=karo-tx-linux.git 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 Signed-off-by: Paul E. McKenney Reviewed-by: Josh Triplett --- 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) return; } RCU_TRACE(trace_rcu_dyntick("Start", oldval, rcu_dynticks_nesting)); - if (current->pid != 0) { + if (!is_idle_task(current)) { struct task_struct *idle = idle_task(smp_processor_id()); RCU_TRACE(trace_rcu_dyntick("Error on entry: not idle task", @@ -118,7 +118,7 @@ static void rcu_idle_exit_common(long long oldval) return; } RCU_TRACE(trace_rcu_dyntick("End", oldval, rcu_dynticks_nesting)); - if (current->pid != 0) { + if (!is_idle_task(current)) { struct task_struct *idle = idle_task(smp_processor_id()); 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) return; } trace_rcu_dyntick("Start", oldval, rdtp->dynticks_nesting); - if (current->pid != 0) { + if (!is_idle_task(current)) { struct task_struct *idle = idle_task(smp_processor_id()); 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) smp_mb__after_atomic_inc(); /* See above. */ WARN_ON_ONCE(!(atomic_read(&rdtp->dynticks) & 0x1)); trace_rcu_dyntick("End", oldval, rdtp->dynticks_nesting); - if (current->pid != 0) { + if (!is_idle_task(current)) { struct task_struct *idle = idle_task(smp_processor_id()); trace_rcu_dyntick("Error on exit: not idle task",