sched: Introduce task_is_running()

Replace a bunch of 'p->state == TASK_RUNNING' with a new helper:
task_is_running(p).

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Davidlohr Bueso <dave@stgolabs.net>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20210611082838.222401495@infradead.org
diff --git a/kernel/kcsan/report.c b/kernel/kcsan/report.c
index 13dce3c..56016e8 100644
--- a/kernel/kcsan/report.c
+++ b/kernel/kcsan/report.c
@@ -460,7 +460,7 @@ static void set_other_info_task_blocking(unsigned long *flags,
 	 * We may be instrumenting a code-path where current->state is already
 	 * something other than TASK_RUNNING.
 	 */
-	const bool is_running = current->state == TASK_RUNNING;
+	const bool is_running = task_is_running(current);
 	/*
 	 * To avoid deadlock in case we are in an interrupt here and this is a
 	 * race with a task on the same CPU (KCSAN_INTERRUPT_WATCHER), provide a