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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2012-06-12 09:40:38 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2012-07-02 12:33:23 -0700 |
| commit | 1bca8cf1a2c3c6683b12ad28a3e826ca7a834978 (patch) | |
| tree | db7b56bd65c8ac7af376599febb44324698b53d4 | |
| parent | d7e187c8e9f30543f9cadfed094896ff414acb8f (diff) | |
| download | linux-1bca8cf1a2c3c6683b12ad28a3e826ca7a834978.tar.gz linux-1bca8cf1a2c3c6683b12ad28a3e826ca7a834978.tar.bz2 linux-1bca8cf1a2c3c6683b12ad28a3e826ca7a834978.zip | |
rcu: Remove unneeded __rcu_process_callbacks() argument
With the advent of __this_cpu_ptr(), it is no longer necessary to pass
both the rcu_state and rcu_data structures into __rcu_process_callbacks().
This commit therefore computes the rcu_data pointer from the rcu_state
pointer within __rcu_process_callbacks() so that callers can pass in
only the pointer to the rcu_state structure. This paves the way for
linking the rcu_state structures together and iterating over them.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
| -rw-r--r-- | kernel/rcutree.c | 8 | ||||
| -rw-r--r-- | kernel/rcutree_plugin.h | 3 |
2 files changed, 5 insertions, 6 deletions
diff --git a/kernel/rcutree.c b/kernel/rcutree.c index dda43d826504..5376a156be8a 100644 --- a/kernel/rcutree.c +++ b/kernel/rcutree.c @@ -1788,9 +1788,10 @@ unlock_fqs_ret: * whom the rdp belongs. */ static void -__rcu_process_callbacks(struct rcu_state *rsp, struct rcu_data *rdp) +__rcu_process_callbacks(struct rcu_state *rsp) { unsigned long flags; + struct rcu_data *rdp = __this_cpu_ptr(rsp->rda); WARN_ON_ONCE(rdp->beenonline == 0); @@ -1827,9 +1828,8 @@ __rcu_process_callbacks(struct rcu_state *rsp, struct rcu_data *rdp) static void rcu_process_callbacks(struct softirq_action *unused) { trace_rcu_utilization("Start RCU core"); - __rcu_process_callbacks(&rcu_sched_state, - &__get_cpu_var(rcu_sched_data)); - __rcu_process_callbacks(&rcu_bh_state, &__get_cpu_var(rcu_bh_data)); + __rcu_process_callbacks(&rcu_sched_state); + __rcu_process_callbacks(&rcu_bh_state); rcu_preempt_process_callbacks(); trace_rcu_utilization("End RCU core"); } diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h index 9cb3a68819fa..5a80cdd9a0a3 100644 --- a/kernel/rcutree_plugin.h +++ b/kernel/rcutree_plugin.h @@ -687,8 +687,7 @@ static void rcu_preempt_check_callbacks(int cpu) */ static void rcu_preempt_process_callbacks(void) { - __rcu_process_callbacks(&rcu_preempt_state, - &__get_cpu_var(rcu_preempt_data)); + __rcu_process_callbacks(&rcu_preempt_state); } #ifdef CONFIG_RCU_BOOST |