+++ /dev/null
-#ifndef _ARCH_POWERPC_LOCAL_H
-#define _ARCH_POWERPC_LOCAL_H
-
-#include <linux/percpu.h>
-#include <asm/atomic.h>
-
-typedef struct
-{
- atomic_long_t a;
-} local_t;
-
-#define LOCAL_INIT(i) { ATOMIC_LONG_INIT(i) }
-
-#define local_read(l) atomic_long_read(&(l)->a)
-#define local_set(l,i) atomic_long_set(&(l)->a, (i))
-
-#define local_add(i,l) atomic_long_add((i),(&(l)->a))
-#define local_sub(i,l) atomic_long_sub((i),(&(l)->a))
-#define local_inc(l) atomic_long_inc(&(l)->a)
-#define local_dec(l) atomic_long_dec(&(l)->a)
-
-static __inline__ long local_add_return(long a, local_t *l)
-{
- long t;
-
- __asm__ __volatile__(
-"1:" PPC_LLARX "%0,0,%2 # local_add_return\n\
- add %0,%1,%0\n"
- PPC405_ERR77(0,%2)
- PPC_STLCX "%0,0,%2 \n\
- bne- 1b"
- : "=&r" (t)
- : "r" (a), "r" (&(l->a.counter))
- : "cc", "memory");
-
- return t;
-}
-
-#define local_add_negative(a, l) (local_add_return((a), (l)) < 0)
-
-static __inline__ long local_sub_return(long a, local_t *l)
-{
- long t;
-
- __asm__ __volatile__(
-"1:" PPC_LLARX "%0,0,%2 # local_sub_return\n\
- subf %0,%1,%0\n"
- PPC405_ERR77(0,%2)
- PPC_STLCX "%0,0,%2 \n\
- bne- 1b"
- : "=&r" (t)
- : "r" (a), "r" (&(l->a.counter))
- : "cc", "memory");
-
- return t;
-}
-
-static __inline__ long local_inc_return(local_t *l)
-{
- long t;
-
- __asm__ __volatile__(
-"1:" PPC_LLARX "%0,0,%1 # local_inc_return\n\
- addic %0,%0,1\n"
- PPC405_ERR77(0,%1)
- PPC_STLCX "%0,0,%1 \n\
- bne- 1b"
- : "=&r" (t)
- : "r" (&(l->a.counter))
- : "cc", "memory");
-
- return t;
-}
-
-/*
- * local_inc_and_test - increment and test
- * @l: pointer of type local_t
- *
- * Atomically increments @l by 1
- * and returns true if the result is zero, or false for all
- * other cases.
- */
-#define local_inc_and_test(l) (local_inc_return(l) == 0)
-
-static __inline__ long local_dec_return(local_t *l)
-{
- long t;
-
- __asm__ __volatile__(
-"1:" PPC_LLARX "%0,0,%1 # local_dec_return\n\
- addic %0,%0,-1\n"
- PPC405_ERR77(0,%1)
- PPC_STLCX "%0,0,%1\n\
- bne- 1b"
- : "=&r" (t)
- : "r" (&(l->a.counter))
- : "cc", "memory");
-
- return t;
-}
-
-#define local_cmpxchg(l, o, n) \
- (cmpxchg_local(&((l)->a.counter), (o), (n)))
-#define local_xchg(l, n) (xchg_local(&((l)->a.counter), (n)))
-
-/**
- * local_add_unless - add unless the number is a given value
- * @l: pointer of type local_t
- * @a: the amount to add to v...
- * @u: ...unless v is equal to u.
- *
- * Atomically adds @a to @l, so long as it was not @u.
- * Returns non-zero if @l was not @u, and zero otherwise.
- */
-static __inline__ int local_add_unless(local_t *l, long a, long u)
-{
- long t;
-
- __asm__ __volatile__ (
-"1:" PPC_LLARX "%0,0,%1 # local_add_unless\n\
- cmpw 0,%0,%3 \n\
- beq- 2f \n\
- add %0,%2,%0 \n"
- PPC405_ERR77(0,%2)
- PPC_STLCX "%0,0,%1 \n\
- bne- 1b \n"
-" subf %0,%2,%0 \n\
-2:"
- : "=&r" (t)
- : "r" (&(l->a.counter)), "r" (a), "r" (u)
- : "cc", "memory");
-
- return t != u;
-}
-
-#define local_inc_not_zero(l) local_add_unless((l), 1, 0)
-
-#define local_sub_and_test(a, l) (local_sub_return((a), (l)) == 0)
-#define local_dec_and_test(l) (local_dec_return((l)) == 0)
-
-/*
- * Atomically test *l and decrement if it is greater than 0.
- * The function returns the old value of *l minus 1.
- */
-static __inline__ long local_dec_if_positive(local_t *l)
-{
- long t;
-
- __asm__ __volatile__(
-"1:" PPC_LLARX "%0,0,%1 # local_dec_if_positive\n\
- cmpwi %0,1\n\
- addi %0,%0,-1\n\
- blt- 2f\n"
- PPC405_ERR77(0,%1)
- PPC_STLCX "%0,0,%1\n\
- bne- 1b"
- "\n\
-2:" : "=&b" (t)
- : "r" (&(l->a.counter))
- : "cc", "memory");
-
- return t;
-}
-
-/* Use these for per-cpu local_t variables: on some archs they are
- * much more efficient than these naive implementations. Note they take
- * a variable, not an address.
- */
-
-#define __local_inc(l) ((l)->a.counter++)
-#define __local_dec(l) ((l)->a.counter++)
-#define __local_add(i,l) ((l)->a.counter+=(i))
-#define __local_sub(i,l) ((l)->a.counter-=(i))
-
-/* Need to disable preemption for the cpu local counters otherwise we could
- still access a variable of a previous CPU in a non atomic way. */
-#define cpu_local_wrap_v(l) \
- ({ local_t res__; \
- preempt_disable(); \
- res__ = (l); \
- preempt_enable(); \
- res__; })
-#define cpu_local_wrap(l) \
- ({ preempt_disable(); \
- l; \
- preempt_enable(); }) \
-
-#define cpu_local_read(l) cpu_local_wrap_v(local_read(&__get_cpu_var(l)))
-#define cpu_local_set(l, i) cpu_local_wrap(local_set(&__get_cpu_var(l), (i)))
-#define cpu_local_inc(l) cpu_local_wrap(local_inc(&__get_cpu_var(l)))
-#define cpu_local_dec(l) cpu_local_wrap(local_dec(&__get_cpu_var(l)))
-#define cpu_local_add(i, l) cpu_local_wrap(local_add((i), &__get_cpu_var(l)))
-#define cpu_local_sub(i, l) cpu_local_wrap(local_sub((i), &__get_cpu_var(l)))
-
-#define __cpu_local_inc(l) cpu_local_inc(l)
-#define __cpu_local_dec(l) cpu_local_dec(l)
-#define __cpu_local_add(i, l) cpu_local_add((i), (l))
-#define __cpu_local_sub(i, l) cpu_local_sub((i), (l))
-
-#endif /* _ARCH_POWERPC_LOCAL_H */
git.samba.org / sfrench / cifs-2.6.git / blobdiff