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rcu: Uninline multi-use function: finish_rcuwait() 

This is a rarely used function, so uninlining its 3 instructions
is probably a win or a wash - but the main motivation is to
make <linux/rcuwait.h> independent of task_struct details.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Ingo Molnar 2022-01-14 16:07:28 -08:00 committed by Paul E. McKenney
parent c099290310
commit 58d4292bd0
2 changed files with 8 additions and 5 deletions
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6
include/linux/rcuwait.h
View File

@ -47,11 +47,7 @@ static inline void prepare_to_rcuwait(struct rcuwait *w)
rcu_assign_pointer(w->task, current);
}
static inline void finish_rcuwait(struct rcuwait *w)
{
rcu_assign_pointer(w->task, NULL);
__set_current_state(TASK_RUNNING);
}
extern void finish_rcuwait(struct rcuwait *w);
#define rcuwait_wait_event(w, condition, state) \
({ \

7
kernel/rcu/update.c
View File

@ -407,6 +407,13 @@ void __wait_rcu_gp(bool checktiny, int n, call_rcu_func_t *crcu_array,
}
EXPORT_SYMBOL_GPL(__wait_rcu_gp);
void finish_rcuwait(struct rcuwait *w)
{
rcu_assign_pointer(w->task, NULL);
__set_current_state(TASK_RUNNING);
}
EXPORT_SYMBOL_GPL(finish_rcuwait);
#ifdef CONFIG_DEBUG_OBJECTS_RCU_HEAD
void init_rcu_head(struct rcu_head *head)
{