Workqueue already provides concurrency control. By that, any wait in a work doesn't prevents events in other works with the control enabled. Thus, each work would better be considered a different context.
So let dept assign a different context id to each work.
Signed-off-by: Byungchul Park byungchul@sk.com --- kernel/workqueue.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/kernel/workqueue.c b/kernel/workqueue.c index c6ea96d5b716..4a4075d0697c 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -55,6 +55,7 @@ #include <linux/kvm_para.h> #include <linux/delay.h> #include <linux/irq_work.h> +#include <linux/dept.h>
#include "workqueue_internal.h"
@@ -3204,6 +3205,8 @@ __acquires(&pool->lock)
lockdep_copy_map(&lockdep_map, &work->lockdep_map); #endif + dept_update_cxt(); + /* ensure we're on the correct CPU */ WARN_ON_ONCE(!(pool->flags & POOL_DISASSOCIATED) && raw_smp_processor_id() != pool->cpu);