| 1 |
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| 2 | #ifndef _ASM_GENERIC_BITOPS_ATOMIC_H_
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| 3 | #define _ASM_GENERIC_BITOPS_ATOMIC_H_
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| 4 |
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| 5 | #include <linux/atomic.h>
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| 6 | #include <linux/compiler.h>
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| 7 | #include <asm/barrier.h>
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| 8 |
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| 9 | |
| 10 | * Implementation of atomic bitops using atomic-fetch ops.
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| 11 | * See Documentation/atomic_bitops.txt for details.
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| 12 |
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| 13 |
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| 14 | static __always_inline void
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| 15 | arch_set_bit(unsigned int nr, volatile unsigned long *p)
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| 16 | {
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| 17 | p += BIT_WORD(nr);
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| 18 | raw_atomic_long_or(BIT_MASK(nr), (atomic_long_t *)p);
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| 19 | }
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| 20 |
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| 21 | static __always_inline void
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| 22 | arch_clear_bit(unsigned int nr, volatile unsigned long *p)
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| 23 | {
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| 24 | p += BIT_WORD(nr);
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| 25 | raw_atomic_long_andnot(BIT_MASK(nr), (atomic_long_t *)p);
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| 26 | }
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| 27 |
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| 28 | static __always_inline void
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| 29 | arch_change_bit(unsigned int nr, volatile unsigned long *p)
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| 30 | {
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| 31 | p += BIT_WORD(nr);
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| 32 | raw_atomic_long_xor(BIT_MASK(nr), (atomic_long_t *)p);
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| 33 | }
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| 34 |
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| 35 | static __always_inline int
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| 36 | arch_test_and_set_bit(unsigned int nr, volatile unsigned long *p)
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| 37 | {
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| 38 | long old;
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| 39 | unsigned long mask = BIT_MASK(nr);
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| 40 |
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| 41 | p += BIT_WORD(nr);
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| 42 | old = raw_atomic_long_fetch_or(mask, (atomic_long_t *)p);
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| 43 | return !!(old & mask);
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| 44 | }
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| 45 |
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| 46 | static __always_inline int
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| 47 | arch_test_and_clear_bit(unsigned int nr, volatile unsigned long *p)
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| 48 | {
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| 49 | long old;
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| 50 | unsigned long mask = BIT_MASK(nr);
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| 51 |
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| 52 | p += BIT_WORD(nr);
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| 53 | old = raw_atomic_long_fetch_andnot(mask, (atomic_long_t *)p);
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| 54 | return !!(old & mask);
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| 55 | }
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| 56 |
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| 57 | static __always_inline int
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| 58 | arch_test_and_change_bit(unsigned int nr, volatile unsigned long *p)
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| 59 | {
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| 60 | long old;
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| 61 | unsigned long mask = BIT_MASK(nr);
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| 62 |
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| 63 | p += BIT_WORD(nr);
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| 64 | old = raw_atomic_long_fetch_xor(mask, (atomic_long_t *)p);
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| 65 | return !!(old & mask);
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| 66 | }
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| 67 |
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| 68 | #include <asm-generic/bitops/instrumented-atomic.h>
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| 69 |
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| 70 | #endif
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