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rcu: Clean up code based on review feedback from Josh Triplett, part 2

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These issues identified during an old-fashioned face-to-face code
review extending over many hours.

o	Add comments for tricky parts of code, and correct comments
	that have passed their sell-by date.

o	Get rid of the vestiges of rcu_init_sched(), which is no
	longer needed now that PREEMPT_RCU is gone.

o	Move the #include of rcutree_plugin.h to the end of
	rcutree.c, which means that, rather than having a random
	collection of forward declarations, the new set of forward
	declarations document the set of plugins.  The new home for
	this #include also allows __rcu_init_preempt() to move into
	rcutree_plugin.h.

o	Fix rcu_preempt_check_callbacks() to be static.

Suggested-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: laijs@cn.fujitsu.com
Cc: dipankar@in.ibm.com
Cc: akpm@linux-foundation.org
Cc: mathieu.desnoyers@polymtl.ca
Cc: josh@joshtriplett.org
Cc: dvhltc@us.ibm.com
Cc: niv@us.ibm.com
Cc: peterz@infradead.org
Cc: rostedt@goodmis.org
Cc: Valdis.Kletnieks@vt.edu
Cc: dhowells@redhat.com
LKML-Reference: <12537246443924-git-send-email->
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Peter Zijlstra <peterz@infradead.org>
This commit is contained in:
Paul E. McKenney
2009-09-23 09:50:42 -07:00
committed by Ingo Molnar
parent fc2219d49e
commit 1eba8f8438
6 changed files with 82 additions and 55 deletions
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23
kernel/rcutree_plugin.h
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@@ -418,6 +418,18 @@ static void __cpuinit rcu_preempt_init_percpu_data(int cpu)
rcu_init_percpu_data(cpu, &rcu_preempt_state, 1);
}
/*
* Initialize preemptable RCU's state structures.
*/
static void __init __rcu_init_preempt(void)
{
int i; /* All used by RCU_INIT_FLAVOR(). */
int j;
struct rcu_node *rnp;
RCU_INIT_FLAVOR(&rcu_preempt_state, rcu_preempt_data);
}
/*
* Check for a task exiting while in a preemptable-RCU read-side
* critical section, clean up if so. No need to issue warnings,
@@ -518,7 +530,7 @@ static void rcu_preempt_offline_cpu(int cpu)
* Because preemptable RCU does not exist, it never has any callbacks
* to check.
*/
void rcu_preempt_check_callbacks(int cpu)
static void rcu_preempt_check_callbacks(int cpu)
{
}
@@ -526,7 +538,7 @@ void rcu_preempt_check_callbacks(int cpu)
* Because preemptable RCU does not exist, it never has any callbacks
* to process.
*/
void rcu_preempt_process_callbacks(void)
static void rcu_preempt_process_callbacks(void)
{
}
@@ -563,4 +575,11 @@ static void __cpuinit rcu_preempt_init_percpu_data(int cpu)
{
}
/*
* Because preemptable RCU does not exist, it need not be initialized.
*/
static void __init __rcu_init_preempt(void)
{
}
#endif /* #else #ifdef CONFIG_TREE_PREEMPT_RCU */