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| author |   Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2014-10-21 08:12:00 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2014-11-03 19:20:26 -0800 |
| commit | 86aea0e6e7d571a9452082a7198d0603cc5dd965 (patch) | |
| tree | 353941d11b01fdca6544ec7f18e231ab319a11a6 /kernel/rcu | |
| parent | rcu: Remove "cpu" argument to rcu_pending() (diff) | |
| download | linux-dev-86aea0e6e7d571a9452082a7198d0603cc5dd965.tar.xz linux-dev-86aea0e6e7d571a9452082a7198d0603cc5dd965.zip | |
rcu: Remove "cpu" argument to rcu_preempt_check_callbacks()
Because rcu_preempt_check_callbacks()'s argument is guaranteed to
always be the current CPU, drop the argument and replace per_cpu()
with __this_cpu_read().
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Pranith Kumar <bobby.prani@gmail.com>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/tree.c | 2 | ||||
| -rw-r--r-- | kernel/rcu/tree.h | 2 | ||||
| -rw-r--r-- | kernel/rcu/tree_plugin.h | 8 |
3 files changed, 6 insertions, 6 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 0670ba3a65d3..1af5e2cdcbeb 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -2420,7 +2420,7 @@ void rcu_check_callbacks(int user) rcu_bh_qs(); } - rcu_preempt_check_callbacks(smp_processor_id()); + rcu_preempt_check_callbacks(); if (rcu_pending()) invoke_rcu_core(); if (user) diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h index 8e90562010ec..94a26e330c1b 100644 --- a/kernel/rcu/tree.h +++ b/kernel/rcu/tree.h @@ -561,7 +561,7 @@ static int rcu_preempt_offline_tasks(struct rcu_state *rsp, struct rcu_node *rnp, struct rcu_data *rdp); #endif /* #ifdef CONFIG_HOTPLUG_CPU */ -static void rcu_preempt_check_callbacks(int cpu); +static void rcu_preempt_check_callbacks(void); void call_rcu(struct rcu_head *head, void (*func)(struct rcu_head *rcu)); #if defined(CONFIG_HOTPLUG_CPU) || defined(CONFIG_TREE_PREEMPT_RCU) static void rcu_report_exp_rnp(struct rcu_state *rsp, struct rcu_node *rnp, diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h index 09547143628a..7158814b7b4a 100644 --- a/kernel/rcu/tree_plugin.h +++ b/kernel/rcu/tree_plugin.h @@ -621,7 +621,7 @@ static int rcu_preempt_offline_tasks(struct rcu_state *rsp, * * Caller must disable hard irqs. */ -static void rcu_preempt_check_callbacks(int cpu) +static void rcu_preempt_check_callbacks(void) { struct task_struct *t = current; @@ -630,8 +630,8 @@ static void rcu_preempt_check_callbacks(int cpu) return; } if (t->rcu_read_lock_nesting > 0 && - per_cpu(rcu_preempt_data, cpu).qs_pending && - !per_cpu(rcu_preempt_data, cpu).passed_quiesce) + __this_cpu_read(rcu_preempt_data.qs_pending) && + !__this_cpu_read(rcu_preempt_data.passed_quiesce)) t->rcu_read_unlock_special.b.need_qs = true; } @@ -1017,7 +1017,7 @@ static int rcu_preempt_offline_tasks(struct rcu_state *rsp, * Because preemptible RCU does not exist, it never has any callbacks * to check. */ -static void rcu_preempt_check_callbacks(int cpu) +static void rcu_preempt_check_callbacks(void) { } |