7847777a45
After changing all consumers of atomics to include <linux/atomic.h>, we
ran into some compile time errors due to this dependency chain:
linux/atomic.h
-> asm/atomic.h
-> asm-generic/atomic-long.h
where atomic-long.h could use funcs defined later in linux/atomic.h
without a prototype. This patches moves the code that includes
asm-generic/atomic*.h to linux/atomic.h.
Archs that need <asm-generic/atomic64.h> need to select
CONFIG_GENERIC_ATOMIC64 from now on (some of them used to include it
unconditionally).
Compile tested on i386 and x86_64 with allnoconfig.
Signed-off-by: Arun Sharma <asharma@fb.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: David Miller <davem@davemloft.net>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
149 lines
3.4 KiB
C
149 lines
3.4 KiB
C
#ifndef __ARCH_H8300_ATOMIC__
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#define __ARCH_H8300_ATOMIC__
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#include <linux/types.h>
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/*
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* Atomic operations that C can't guarantee us. Useful for
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* resource counting etc..
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*/
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#define ATOMIC_INIT(i) { (i) }
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#define atomic_read(v) (*(volatile int *)&(v)->counter)
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#define atomic_set(v, i) (((v)->counter) = i)
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#include <asm/system.h>
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#include <linux/kernel.h>
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static __inline__ int atomic_add_return(int i, atomic_t *v)
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{
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unsigned long flags;
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int ret;
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local_irq_save(flags);
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ret = v->counter += i;
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local_irq_restore(flags);
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return ret;
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}
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#define atomic_add(i, v) atomic_add_return(i, v)
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#define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0)
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static __inline__ int atomic_sub_return(int i, atomic_t *v)
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{
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unsigned long flags;
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int ret;
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local_irq_save(flags);
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ret = v->counter -= i;
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local_irq_restore(flags);
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return ret;
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}
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#define atomic_sub(i, v) atomic_sub_return(i, v)
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#define atomic_sub_and_test(i,v) (atomic_sub_return(i, v) == 0)
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static __inline__ int atomic_inc_return(atomic_t *v)
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{
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unsigned long flags;
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int ret;
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local_irq_save(flags);
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v->counter++;
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ret = v->counter;
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local_irq_restore(flags);
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return ret;
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}
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#define atomic_inc(v) atomic_inc_return(v)
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/*
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* atomic_inc_and_test - increment and test
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* @v: pointer of type atomic_t
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*
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* Atomically increments @v by 1
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* and returns true if the result is zero, or false for all
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* other cases.
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*/
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#define atomic_inc_and_test(v) (atomic_inc_return(v) == 0)
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static __inline__ int atomic_dec_return(atomic_t *v)
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{
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unsigned long flags;
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int ret;
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local_irq_save(flags);
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--v->counter;
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ret = v->counter;
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local_irq_restore(flags);
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return ret;
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}
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#define atomic_dec(v) atomic_dec_return(v)
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static __inline__ int atomic_dec_and_test(atomic_t *v)
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{
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unsigned long flags;
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int ret;
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local_irq_save(flags);
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--v->counter;
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ret = v->counter;
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local_irq_restore(flags);
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return ret == 0;
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}
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static inline int atomic_cmpxchg(atomic_t *v, int old, int new)
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{
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int ret;
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unsigned long flags;
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local_irq_save(flags);
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ret = v->counter;
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if (likely(ret == old))
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v->counter = new;
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local_irq_restore(flags);
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return ret;
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}
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#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
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static inline int __atomic_add_unless(atomic_t *v, int a, int u)
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{
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int ret;
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unsigned long flags;
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local_irq_save(flags);
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ret = v->counter;
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if (ret != u)
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v->counter += a;
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local_irq_restore(flags);
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return ret;
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}
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static __inline__ void atomic_clear_mask(unsigned long mask, unsigned long *v)
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{
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__asm__ __volatile__("stc ccr,r1l\n\t"
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"orc #0x80,ccr\n\t"
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"mov.l %0,er0\n\t"
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"and.l %1,er0\n\t"
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"mov.l er0,%0\n\t"
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"ldc r1l,ccr"
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: "=m" (*v) : "g" (~(mask)) :"er0","er1");
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}
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static __inline__ void atomic_set_mask(unsigned long mask, unsigned long *v)
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{
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__asm__ __volatile__("stc ccr,r1l\n\t"
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"orc #0x80,ccr\n\t"
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"mov.l %0,er0\n\t"
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"or.l %1,er0\n\t"
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"mov.l er0,%0\n\t"
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"ldc r1l,ccr"
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: "=m" (*v) : "g" (mask) :"er0","er1");
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}
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/* Atomic operations are already serializing */
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#define smp_mb__before_atomic_dec() barrier()
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#define smp_mb__after_atomic_dec() barrier()
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#define smp_mb__before_atomic_inc() barrier()
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#define smp_mb__after_atomic_inc() barrier()
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#endif /* __ARCH_H8300_ATOMIC __ */
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