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@@ -6,6 +6,7 @@
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#define _ASM_PARISC_ATOMIC_H_
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#define _ASM_PARISC_ATOMIC_H_
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#include <linux/types.h>
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#include <linux/types.h>
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+#include <asm/cmpxchg.h>
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/*
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/*
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* Atomic operations that C can't guarantee us. Useful for
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* Atomic operations that C can't guarantee us. Useful for
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@@ -48,112 +49,6 @@ extern arch_spinlock_t __atomic_hash[ATOMIC_HASH_SIZE] __lock_aligned;
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# define _atomic_spin_unlock_irqrestore(l,f) do { local_irq_restore(f); } while (0)
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# define _atomic_spin_unlock_irqrestore(l,f) do { local_irq_restore(f); } while (0)
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#endif
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#endif
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-/* This should get optimized out since it's never called.
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-** Or get a link error if xchg is used "wrong".
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-*/
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-extern void __xchg_called_with_bad_pointer(void);
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-
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-
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-/* __xchg32/64 defined in arch/parisc/lib/bitops.c */
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-extern unsigned long __xchg8(char, char *);
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-extern unsigned long __xchg32(int, int *);
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-#ifdef CONFIG_64BIT
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-extern unsigned long __xchg64(unsigned long, unsigned long *);
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-#endif
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-
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-/* optimizer better get rid of switch since size is a constant */
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-static __inline__ unsigned long
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-__xchg(unsigned long x, __volatile__ void * ptr, int size)
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-{
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- switch(size) {
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-#ifdef CONFIG_64BIT
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- case 8: return __xchg64(x,(unsigned long *) ptr);
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-#endif
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- case 4: return __xchg32((int) x, (int *) ptr);
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- case 1: return __xchg8((char) x, (char *) ptr);
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- }
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- __xchg_called_with_bad_pointer();
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- return x;
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-}
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-
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-
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-/*
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-** REVISIT - Abandoned use of LDCW in xchg() for now:
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-** o need to test sizeof(*ptr) to avoid clearing adjacent bytes
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-** o and while we are at it, could CONFIG_64BIT code use LDCD too?
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-**
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-** if (__builtin_constant_p(x) && (x == NULL))
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-** if (((unsigned long)p & 0xf) == 0)
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-** return __ldcw(p);
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-*/
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-#define xchg(ptr,x) \
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- ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
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-
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-
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-#define __HAVE_ARCH_CMPXCHG 1
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-
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-/* bug catcher for when unsupported size is used - won't link */
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-extern void __cmpxchg_called_with_bad_pointer(void);
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-
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-/* __cmpxchg_u32/u64 defined in arch/parisc/lib/bitops.c */
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-extern unsigned long __cmpxchg_u32(volatile unsigned int *m, unsigned int old, unsigned int new_);
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-extern unsigned long __cmpxchg_u64(volatile unsigned long *ptr, unsigned long old, unsigned long new_);
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-
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-/* don't worry...optimizer will get rid of most of this */
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-static __inline__ unsigned long
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-__cmpxchg(volatile void *ptr, unsigned long old, unsigned long new_, int size)
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-{
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- switch(size) {
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-#ifdef CONFIG_64BIT
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- case 8: return __cmpxchg_u64((unsigned long *)ptr, old, new_);
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-#endif
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- case 4: return __cmpxchg_u32((unsigned int *)ptr, (unsigned int) old, (unsigned int) new_);
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- }
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- __cmpxchg_called_with_bad_pointer();
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- return old;
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-}
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-
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-#define cmpxchg(ptr,o,n) \
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- ({ \
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- __typeof__(*(ptr)) _o_ = (o); \
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- __typeof__(*(ptr)) _n_ = (n); \
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- (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_, \
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- (unsigned long)_n_, sizeof(*(ptr))); \
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- })
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-
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-#include <asm-generic/cmpxchg-local.h>
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-
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-static inline unsigned long __cmpxchg_local(volatile void *ptr,
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- unsigned long old,
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- unsigned long new_, int size)
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-{
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- switch (size) {
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-#ifdef CONFIG_64BIT
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- case 8: return __cmpxchg_u64((unsigned long *)ptr, old, new_);
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-#endif
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- case 4: return __cmpxchg_u32(ptr, old, new_);
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- default:
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- return __cmpxchg_local_generic(ptr, old, new_, size);
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- }
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-}
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-
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-/*
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- * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make
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- * them available.
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- */
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-#define cmpxchg_local(ptr, o, n) \
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- ((__typeof__(*(ptr)))__cmpxchg_local((ptr), (unsigned long)(o), \
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- (unsigned long)(n), sizeof(*(ptr))))
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-#ifdef CONFIG_64BIT
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-#define cmpxchg64_local(ptr, o, n) \
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- ({ \
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- BUILD_BUG_ON(sizeof(*(ptr)) != 8); \
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- cmpxchg_local((ptr), (o), (n)); \
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- })
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-#else
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-#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
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-#endif
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-
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/*
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/*
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* Note that we need not lock read accesses - aligned word writes/reads
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* Note that we need not lock read accesses - aligned word writes/reads
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* are atomic, so a reader never sees inconsistent values.
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* are atomic, so a reader never sees inconsistent values.
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