Commit 066123a5 authored by Tejun Heo's avatar Tejun Heo Committed by Ingo Molnar
Browse files

percpu: unbreak alpha percpu 



For the time being, move the generic percpu_*() accessors to
linux/percpu.h.

asm-generic/percpu.h is meant to carry generic stuff for low level
stuff - declarations, definitions and pointer offset calculation
and so on but not for generic interface.

Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 36cd3c9f

include/asm-generic/percpu.h

+0 −52
Original line number Diff line number Diff line
@@ -80,56 +80,4 @@ extern void setup_per_cpu_areas(void); 
#define DECLARE_PER_CPU(type, name) extern PER_CPU_ATTRIBUTES \

					__typeof__(type) per_cpu_var(name)



/*

 * Optional methods for optimized non-lvalue per-cpu variable access.

 *

 * @var can be a percpu variable or a field of it and its size should

 * equal char, int or long.  percpu_read() evaluates to a lvalue and

 * all others to void.

 *

 * These operations are guaranteed to be atomic w.r.t. preemption.

 * The generic versions use plain get/put_cpu_var().  Archs are

 * encouraged to implement single-instruction alternatives which don't

 * require preemption protection.

 */

#ifndef percpu_read

# define percpu_read(var)						\

  ({									\

	typeof(per_cpu_var(var)) __tmp_var__;				\

	__tmp_var__ = get_cpu_var(var);					\

	put_cpu_var(var);						\

	__tmp_var__;							\

  })

#endif



#define __percpu_generic_to_op(var, val, op)				\

do {									\

	get_cpu_var(var) op val;					\

	put_cpu_var(var);						\

} while (0)



#ifndef percpu_write

# define percpu_write(var, val)		__percpu_generic_to_op(var, (val), =)

#endif



#ifndef percpu_add

# define percpu_add(var, val)		__percpu_generic_to_op(var, (val), +=)

#endif



#ifndef percpu_sub

# define percpu_sub(var, val)		__percpu_generic_to_op(var, (val), -=)

#endif



#ifndef percpu_and

# define percpu_and(var, val)		__percpu_generic_to_op(var, (val), &=)

#endif



#ifndef percpu_or

# define percpu_or(var, val)		__percpu_generic_to_op(var, (val), |=)

#endif



#ifndef percpu_xor

# define percpu_xor(var, val)		__percpu_generic_to_op(var, (val), ^=)

#endif



#endif /* _ASM_GENERIC_PERCPU_H_ */

include/linux/percpu.h

+52 −0
Original line number Diff line number Diff line
@@ -168,4 +168,56 @@ static inline void free_percpu(void *p) 
#define alloc_percpu(type)	(type *)__alloc_percpu(sizeof(type), \

						       __alignof__(type))



/*

 * Optional methods for optimized non-lvalue per-cpu variable access.

 *

 * @var can be a percpu variable or a field of it and its size should

 * equal char, int or long.  percpu_read() evaluates to a lvalue and

 * all others to void.

 *

 * These operations are guaranteed to be atomic w.r.t. preemption.

 * The generic versions use plain get/put_cpu_var().  Archs are

 * encouraged to implement single-instruction alternatives which don't

 * require preemption protection.

 */

#ifndef percpu_read

# define percpu_read(var)						\

  ({									\

	typeof(per_cpu_var(var)) __tmp_var__;				\

	__tmp_var__ = get_cpu_var(var);					\

	put_cpu_var(var);						\

	__tmp_var__;							\

  })

#endif



#define __percpu_generic_to_op(var, val, op)				\

do {									\

	get_cpu_var(var) op val;					\

	put_cpu_var(var);						\

} while (0)



#ifndef percpu_write

# define percpu_write(var, val)		__percpu_generic_to_op(var, (val), =)

#endif



#ifndef percpu_add

# define percpu_add(var, val)		__percpu_generic_to_op(var, (val), +=)

#endif



#ifndef percpu_sub

# define percpu_sub(var, val)		__percpu_generic_to_op(var, (val), -=)

#endif



#ifndef percpu_and

# define percpu_and(var, val)		__percpu_generic_to_op(var, (val), &=)

#endif



#ifndef percpu_or

# define percpu_or(var, val)		__percpu_generic_to_op(var, (val), |=)

#endif



#ifndef percpu_xor

# define percpu_xor(var, val)		__percpu_generic_to_op(var, (val), ^=)

#endif



#endif /* __LINUX_PERCPU_H */

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