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Commit a3dc3fb1 authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

rcu: repair code-duplication FIXMEs 



Combine the duplicate definitions of ULONG_CMP_GE(), ULONG_CMP_LT(),
and rcu_preempt_depth() into include/linux/rcupdate.h.

Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent 53d84e00

include/linux/rcupdate.h

+15 −0
Original line number Diff line number Diff line
@@ -47,6 +47,9 @@ 
extern int rcutorture_runnable; /* for sysctl */

#endif /* #ifdef CONFIG_RCU_TORTURE_TEST */



#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
@@ -66,6 +69,18 @@ extern int sched_expedited_torture_stats(char *page); 
/* Internal to kernel */

extern void rcu_init(void);



#ifdef CONFIG_PREEMPT_RCU



/*

 * Defined as a macro as it is a very low level header included from

 * areas that don't even know about current.  This gives the rcu_read_lock()

 * nesting depth, but makes sense only if CONFIG_PREEMPT_RCU -- in other

 * types of kernel builds, the rcu_read_lock() nesting depth is unknowable.

 */

#define rcu_preempt_depth() (current->rcu_read_lock_nesting)



#endif /* #ifdef CONFIG_PREEMPT_RCU */



#if defined(CONFIG_TREE_RCU) || defined(CONFIG_TREE_PREEMPT_RCU)

#include <linux/rcutree.h>

#elif defined(CONFIG_TINY_RCU) || defined(CONFIG_TINY_PREEMPT_RCU)

include/linux/rcutiny.h

+0 −7
Original line number Diff line number Diff line
@@ -133,13 +133,6 @@ static inline int rcu_needs_cpu(int cpu) 
	return rcu_preempt_needs_cpu();

}



/*

 * Defined as macro as it is a very low level header

 * included from areas that don't even know about current

 * FIXME: combine with include/linux/rcutree.h into rcupdate.h.

 */

#define rcu_preempt_depth() (current->rcu_read_lock_nesting)



#endif /* #else #ifdef CONFIG_TINY_RCU */



static inline void rcu_note_context_switch(int cpu)

include/linux/rcutree.h

+0 −6
Original line number Diff line number Diff line
@@ -45,12 +45,6 @@ extern void __rcu_read_unlock(void); 
extern void synchronize_rcu(void);

extern void exit_rcu(void);



/*

 * Defined as macro as it is a very low level header

 * included from areas that don't even know about current

 */

#define rcu_preempt_depth() (current->rcu_read_lock_nesting)



#else /* #ifdef CONFIG_TREE_PREEMPT_RCU */



static inline void __rcu_read_lock(void)

kernel/rcutiny_plugin.h

+0 −4
Original line number Diff line number Diff line
@@ -26,10 +26,6 @@ 


#include <linux/delay.h>



/* FIXME: merge with definitions in kernel/rcutree.h. */

#define ULONG_CMP_GE(a, b)	(ULONG_MAX / 2 >= (a) - (b))

#define ULONG_CMP_LT(a, b)	(ULONG_MAX / 2 < (a) - (b))



/* Global control variables for preemptible RCU. */

struct rcu_preempt_ctrlblk {

	struct rcu_ctrlblk rcb;	/* curtail: ->next ptr of last CB for GP. */

kernel/rcutree.h

+0 −3
Original line number Diff line number Diff line
@@ -272,9 +272,6 @@ struct rcu_data { 


#endif /* #ifdef CONFIG_RCU_CPU_STALL_DETECTOR */



#define ULONG_CMP_GE(a, b)	(ULONG_MAX / 2 >= (a) - (b))

#define ULONG_CMP_LT(a, b)	(ULONG_MAX / 2 < (a) - (b))



/*

 * RCU global state, including node hierarchy.  This hierarchy is

 * represented in "heap" form in a dense array.  The root (first level)