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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-08-05 05:32:07 +0200 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-08-31 01:03:53 +0200 |
| commit | 8d8a9d0e7eda9feeee4af7be31932e14b512d3ad (patch) | |
| tree | 16557e3a1cae13a1b288cda4ac92d6b906df352a /kernel/rcu | |
| parent | rcu: Switch ->dynticks to rcu_data structure, remove rcu_dynticks (diff) | |
| download | linux-8d8a9d0e7eda9feeee4af7be31932e14b512d3ad.tar.xz linux-8d8a9d0e7eda9feeee4af7be31932e14b512d3ad.zip | |
rcu: Remove obsolete ->dynticks_fqs and ->cond_resched_completed
The rcu_data structure's ->dynticks_fqs is incremented but never
accesses. Its ->cond_resched_completed field isn't used at all.
This commit therefore removes both fields.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/tree.c | 1 | ||||
| -rw-r--r-- | kernel/rcu/tree.h | 12 |
2 files changed, 3 insertions, 10 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 32f500fb24d3..85c2c2dc4c4a 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -1039,7 +1039,6 @@ static int rcu_implicit_dynticks_qs(struct rcu_data *rdp) */ if (rcu_dynticks_in_eqs_since(rdp, rdp->dynticks_snap)) { trace_rcu_fqs(rcu_state.name, rdp->gp_seq, rdp->cpu, TPS("dti")); - rdp->dynticks_fqs++; rcu_gpnum_ovf(rnp, rdp); return 1; } diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h index af8681fec23b..bfbf97a1c29d 100644 --- a/kernel/rcu/tree.h +++ b/kernel/rcu/tree.h @@ -203,17 +203,11 @@ struct rcu_data { int tick_nohz_enabled_snap; /* Previously seen value from sysfs. */ #endif /* #ifdef CONFIG_RCU_FAST_NO_HZ */ - /* 4) reasons this CPU needed to be kicked by force_quiescent_state */ - unsigned long dynticks_fqs; /* Kicked due to dynticks idle. */ - unsigned long cond_resched_completed; - /* Grace period that needs help */ - /* from cond_resched(). */ - - /* 5) rcu_barrier(), OOM callbacks, and expediting. */ + /* 4) rcu_barrier(), OOM callbacks, and expediting. */ struct rcu_head barrier_head; int exp_dynticks_snap; /* Double-check need for IPI. */ - /* 6) Callback offloading. */ + /* 5) Callback offloading. */ #ifdef CONFIG_RCU_NOCB_CPU struct rcu_head *nocb_head; /* CBs waiting for kthread. */ struct rcu_head **nocb_tail; @@ -240,7 +234,7 @@ struct rcu_data { /* Leader CPU takes GP-end wakeups. */ #endif /* #ifdef CONFIG_RCU_NOCB_CPU */ - /* 7) Diagnostic data, including RCU CPU stall warnings. */ + /* 6) Diagnostic data, including RCU CPU stall warnings. */ unsigned int softirq_snap; /* Snapshot of softirq activity. */ /* ->rcu_iw* fields protected by leaf rcu_node ->lock. */ struct irq_work rcu_iw; /* Check for non-irq activity. */ |