sched: Use WARN_ONCE for the might_sleep() TASK_RUNNING test

In some cases this can trigger a true flood of output.

Requested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index b9f78f1..0cd34e6 100644 (file)
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -7301,7 +7301,7 @@ void __might_sleep(const char *file, int line, int preempt_offset)
         * since we will exit with TASK_RUNNING make sure we enter with it,
         * otherwise we will destroy state.
         */
-       if (WARN(current->state != TASK_RUNNING,
+       if (WARN_ONCE(current->state != TASK_RUNNING,
                        "do not call blocking ops when !TASK_RUNNING; "
                        "state=%lx set at [<%p>] %pS\n",
                        current->state,