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rcu: Move rcu_head definition to types.h

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Take a first step towards untangling Linux kernel header files by
placing the struct rcu_head definition into include/linux/types.h
and including include/linux/types.h in include/linux/rcupdate.h
where struct rcu_head used to be defined.  The actual inclusion point
for include/linux/types.h is with the rest of the #include directives
rather than at the point where struct rcu_head used to be defined,
as suggested by Mathieu Desnoyers.

Once this is in place, then header files that need only rcu_head
can include types.h rather than rcupdate.h.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
This commit is contained in:
Paul E. McKenney 2011-05-31 21:03:55 -07:00
parent b3fbab0571
commit 990987511c
2 changed files with 11 additions and 10 deletions
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11
include/linux/rcupdate.h
View File

@ -33,6 +33,7 @@
#ifndef __LINUX_RCUPDATE_H
#define __LINUX_RCUPDATE_H
#include <linux/types.h>
#include <linux/cache.h>
#include <linux/spinlock.h>
#include <linux/threads.h>
@ -64,16 +65,6 @@ static inline void rcutorture_record_progress(unsigned long vernum)
#define ULONG_CMP_GE(a, b) (ULONG_MAX / 2 >= (a) - (b))
#define ULONG_CMP_LT(a, b) (ULONG_MAX / 2 < (a) - (b))
/**
* struct rcu_head - callback structure for use with RCU
* @next: next update requests in a list
* @func: actual update function to call after the grace period.
*/
struct rcu_head {
struct rcu_head *next;
void (*func)(struct rcu_head *head);
};
/* Exported common interfaces */
extern void call_rcu_sched(struct rcu_head *head,
void (*func)(struct rcu_head *rcu));

10
include/linux/types.h
View File

@ -238,6 +238,16 @@ struct ustat {
char f_fpack[6];
};
/**
* struct rcu_head - callback structure for use with RCU
* @next: next update requests in a list
* @func: actual update function to call after the grace period.
*/
struct rcu_head {
struct rcu_head *next;
void (*func)(struct rcu_head *head);
};
#endif /* __KERNEL__ */
#endif /* __ASSEMBLY__ */
#endif /* _LINUX_TYPES_H */