rcu: Move rcu_head definition to types.h (99098751) · Commits · 戴 / test

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

+1 −10

Original line number	Diff line number	Diff line
		@@ -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));

include/linux/types.h

+10 −0

Original line number	Diff line number	Diff line
		@@ -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 */

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