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rcu: eliminate synchronize_rcu_xxx macro

Browse source 
Impact: cleanup

Expand macro into two files.

The synchronize_rcu_xxx macro is quite ugly and it's only used by two
callers, so expand it instead.  This makes this code easier to change.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Paul E. McKenney 2009-01-04 13:03:02 -08:00 committed by Ingo Molnar
parent 90a4d2c010
commit ea7d3fef42
3 changed files with 19 additions and 15 deletions
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12
include/linux/rcupdate.h
View file

@ -204,18 +204,6 @@ struct rcu_synchronize {
extern void wakeme_after_rcu(struct rcu_head *head); extern void wakeme_after_rcu(struct rcu_head *head);
#define synchronize_rcu_xxx(name, func) \
void name(void) \
{ \
struct rcu_synchronize rcu; \
\
init_completion(&rcu.completion); \
/* Will wake me after RCU finished. */ \
func(&rcu.head, wakeme_after_rcu); \
/* Wait for it. */ \
wait_for_completion(&rcu.completion); \
}
/** /**
* synchronize_sched - block until all CPUs have exited any non-preemptive * synchronize_sched - block until all CPUs have exited any non-preemptive
* kernel code sequences. * kernel code sequences.

11
kernel/rcupdate.c
View file

@ -77,8 +77,15 @@ void wakeme_after_rcu(struct rcu_head *head)
* sections are delimited by rcu_read_lock() and rcu_read_unlock(), * sections are delimited by rcu_read_lock() and rcu_read_unlock(),
* and may be nested. * and may be nested.
*/ */
void synchronize_rcu(void); /* Makes kernel-doc tools happy */ void synchronize_rcu(void)
synchronize_rcu_xxx(synchronize_rcu, call_rcu) {
struct rcu_synchronize rcu;
init_completion(&rcu.completion);
/* Will wake me after RCU finished. */
call_rcu(&rcu.head, wakeme_after_rcu);
/* Wait for it. */
wait_for_completion(&rcu.completion);
}
EXPORT_SYMBOL_GPL(synchronize_rcu); EXPORT_SYMBOL_GPL(synchronize_rcu);
static void rcu_barrier_callback(struct rcu_head *notused) static void rcu_barrier_callback(struct rcu_head *notused)

11
kernel/rcupreempt.c
View file

@ -1177,7 +1177,16 @@ EXPORT_SYMBOL_GPL(call_rcu_sched);
* in -rt this does -not- necessarily result in all currently executing * in -rt this does -not- necessarily result in all currently executing
* interrupt -handlers- having completed. * interrupt -handlers- having completed.
*/ */
synchronize_rcu_xxx(__synchronize_sched, call_rcu_sched) void __synchronize_sched(void)
{
struct rcu_synchronize rcu;
init_completion(&rcu.completion);
/* Will wake me after RCU finished. */
call_rcu_sched(&rcu.head, wakeme_after_rcu);
/* Wait for it. */
wait_for_completion(&rcu.completion);
}
EXPORT_SYMBOL_GPL(__synchronize_sched); EXPORT_SYMBOL_GPL(__synchronize_sched);
/* /*