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Subject[PATCH tip/core/rcu 05/55] rcu: Move rcu_head definition to types.h
Date
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>
---
include/linux/rcupdate.h | 11 +----------
include/linux/types.h | 10 ++++++++++
2 files changed, 11 insertions(+), 10 deletions(-)

diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index 8be0433..2516555 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -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));
diff --git a/include/linux/types.h b/include/linux/types.h
index 176da8c..57a9723 100644
--- a/include/linux/types.h
+++ b/include/linux/types.h
@@ -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 */
--
1.7.3.2


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