From: Paul E. McKenney Date: Thu, 2 Jul 2015 19:27:31 +0000 (-0700) Subject: rcu: Rename RCU_GP_DONE_FQS to RCU_GP_DOING_FQS X-Git-Tag: v4.3-rc1~142^2~1^2~1^2~2 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=32bb1c79996069ef9e4e53b428050749f9841c3f;p=karo-tx-linux.git rcu: Rename RCU_GP_DONE_FQS to RCU_GP_DOING_FQS The grace-period kthread sleeps waiting to do a force-quiescent-state scan, and when awakened sets rsp->gp_state to RCU_GP_DONE_FQS. However, this is confusing because the kthread has not done the force-quiescent-state, but is instead just starting to do it. This commit therefore renames RCU_GP_DONE_FQS to RCU_GP_DOING_FQS in order to make things a bit easier on reviewers. Reported-by: Peter Zijlstra Signed-off-by: Paul E. McKenney --- diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index b2803730ac13..f66f6e7730bc 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -2088,7 +2088,7 @@ static int __noreturn rcu_gp_kthread(void *arg) rsp->gp_state = RCU_GP_WAIT_FQS; ret = wait_event_interruptible_timeout(rsp->gp_wq, rcu_gp_fqs_check_wake(rsp, &gf), j); - rsp->gp_state = RCU_GP_DONE_FQS; + rsp->gp_state = RCU_GP_DOING_FQS; /* Locking provides needed memory barriers. */ /* If grace period done, leave loop. */ if (!READ_ONCE(rnp->qsmask) && diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h index b3ae8d3cffbc..543ba726396c 100644 --- a/kernel/rcu/tree.h +++ b/kernel/rcu/tree.h @@ -535,7 +535,7 @@ struct rcu_state { #define RCU_GP_WAIT_GPS 1 /* Wait for grace-period start. */ #define RCU_GP_DONE_GPS 2 /* Wait done for grace-period start. */ #define RCU_GP_WAIT_FQS 3 /* Wait for force-quiescent-state time. */ -#define RCU_GP_DONE_FQS 4 /* Wait done for force-quiescent-state time. */ +#define RCU_GP_DOING_FQS 4 /* Wait done for force-quiescent-state time. */ #define RCU_GP_CLEANUP 5 /* Grace-period cleanup started. */ #define RCU_GP_CLEANED 6 /* Grace-period cleanup complete. */