84fdf6cda3
Now that atomic_t is a generic opaque type for all architectures, it is unwise to use intimate knowledge of its internals when manipulating it. Instead of relying on the "counter" member being at offset 0 from the beginning of an atomic_t, explicitly reference the member. This guards us from any changes to the layout of the beginning of the atomic_t type. Signed-off-by: Matt Fleming <matt@console-pimps.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
71 lines
1.3 KiB
C
71 lines
1.3 KiB
C
#ifndef __ASM_SH_ATOMIC_IRQ_H
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#define __ASM_SH_ATOMIC_IRQ_H
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/*
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* To get proper branch prediction for the main line, we must branch
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* forward to code at the end of this object's .text section, then
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* branch back to restart the operation.
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*/
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static inline void atomic_add(int i, atomic_t *v)
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{
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unsigned long flags;
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local_irq_save(flags);
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v->counter += i;
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local_irq_restore(flags);
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}
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static inline void atomic_sub(int i, atomic_t *v)
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{
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unsigned long flags;
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local_irq_save(flags);
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v->counter -= i;
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local_irq_restore(flags);
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}
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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 temp, flags;
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local_irq_save(flags);
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temp = v->counter;
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temp += i;
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v->counter = temp;
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local_irq_restore(flags);
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return temp;
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}
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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 temp, flags;
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local_irq_save(flags);
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temp = v->counter;
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temp -= i;
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v->counter = temp;
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local_irq_restore(flags);
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return temp;
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}
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static inline void atomic_clear_mask(unsigned int mask, atomic_t *v)
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{
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unsigned long flags;
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local_irq_save(flags);
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v->counter &= ~mask;
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local_irq_restore(flags);
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}
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static inline void atomic_set_mask(unsigned int mask, atomic_t *v)
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{
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unsigned long flags;
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local_irq_save(flags);
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v->counter |= mask;
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local_irq_restore(flags);
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}
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#endif /* __ASM_SH_ATOMIC_IRQ_H */
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