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| 2 | #ifndef __ASM_SYNC_BITOPS_H__
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| 3 | #define __ASM_SYNC_BITOPS_H__
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| 4 |
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| 5 | #include <asm/bitops.h>
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| 6 | #include <asm/cmpxchg.h>
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| 7 |
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| 8 | |
| 9 | * original functions, independently from CONFIG_SMP being defined.
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| 10 | *
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| 11 | * We need them because _set_bit etc are not SMP safe if !CONFIG_SMP. But
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| 12 | * under Xen you might be communicating with a completely external entity
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| 13 | * who might be on another CPU (e.g. two uniprocessor guests communicating
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| 14 | * via event channels and grant tables). So we need a variant of the bit
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| 15 | * ops which are SMP safe even on a UP kernel.
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| 16 |
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| 17 |
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| 18 | #define sync_set_bit(nr, p) set_bit(nr, p)
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| 19 | #define sync_clear_bit(nr, p) clear_bit(nr, p)
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| 20 | #define sync_change_bit(nr, p) change_bit(nr, p)
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| 21 | #define sync_test_and_set_bit(nr, p) test_and_set_bit(nr, p)
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| 22 | #define sync_test_and_clear_bit(nr, p) test_and_clear_bit(nr, p)
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| 23 | #define sync_test_and_change_bit(nr, p) test_and_change_bit(nr, p)
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| 24 | #define sync_test_bit(nr, addr) test_bit(nr, addr)
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| 25 | #define arch_sync_cmpxchg arch_cmpxchg
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| 26 |
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| 27 | #endif
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