| 1 | #ifndef _ASM_GENERIC_PERCPU_H_
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| 2 | #define _ASM_GENERIC_PERCPU_H_
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| 3 |
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| 4 | #include <linux/compiler.h>
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| 5 | #include <linux/threads.h>
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| 6 | #include <linux/percpu-defs.h>
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| 7 |
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| 8 | #ifdef CONFIG_SMP
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| 9 |
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| 10 | |
| 11 | * per_cpu_offset() is the offset that has to be added to a
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| 12 | * percpu variable to get to the instance for a certain processor.
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| 13 | *
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| 14 | * Most arches use the __per_cpu_offset array for those offsets but
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| 15 | * some arches have their own ways of determining the offset (x86_64, s390).
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| 16 |
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| 17 | #ifndef __per_cpu_offset
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| 18 | extern unsigned long __per_cpu_offset[NR_CPUS];
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| 19 |
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| 20 | #define per_cpu_offset(x) (__per_cpu_offset[x])
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| 21 | #endif
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| 22 |
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| 23 | |
| 24 | * Determine the offset for the currently active processor.
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| 25 | * An arch may define __my_cpu_offset to provide a more effective
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| 26 | * means of obtaining the offset to the per cpu variables of the
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| 27 | * current processor.
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| 28 |
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| 29 | #ifndef __my_cpu_offset
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| 30 | #define __my_cpu_offset per_cpu_offset(raw_smp_processor_id())
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| 31 | #endif
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| 32 | #ifdef CONFIG_DEBUG_PREEMPT
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| 33 | #define my_cpu_offset per_cpu_offset(smp_processor_id())
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| 34 | #else
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| 35 | #define my_cpu_offset __my_cpu_offset
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| 36 | #endif
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| 37 |
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| 38 | |
| 39 | * Arch may define arch_raw_cpu_ptr() to provide more efficient address
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| 40 | * translations for raw_cpu_ptr().
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| 41 |
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| 42 | #ifndef arch_raw_cpu_ptr
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| 43 | #define arch_raw_cpu_ptr(ptr) SHIFT_PERCPU_PTR(ptr, __my_cpu_offset)
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| 44 | #endif
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| 45 |
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| 46 | #ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA
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| 47 | extern void setup_per_cpu_areas(void);
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| 48 | #endif
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| 49 |
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| 50 | #endif
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| 51 |
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| 52 | #ifndef PER_CPU_BASE_SECTION
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| 53 | #ifdef CONFIG_SMP
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| 54 | #define PER_CPU_BASE_SECTION ".data..percpu"
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| 55 | #else
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| 56 | #define PER_CPU_BASE_SECTION ".data"
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| 57 | #endif
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| 58 | #endif
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| 59 |
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| 60 | #ifndef PER_CPU_ATTRIBUTES
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| 61 | #define PER_CPU_ATTRIBUTES
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| 62 | #endif
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| 63 |
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| 64 | #ifndef PER_CPU_DEF_ATTRIBUTES
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| 65 | #define PER_CPU_DEF_ATTRIBUTES
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| 66 | #endif
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| 67 |
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| 68 | #define raw_cpu_generic_read(pcp) \
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| 69 | ({ \
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| 70 | *raw_cpu_ptr(&(pcp)); \
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| 71 | })
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| 72 |
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| 73 | #define raw_cpu_generic_to_op(pcp, val, op) \
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| 74 | do { \
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| 75 | *raw_cpu_ptr(&(pcp)) op val; \
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| 76 | } while (0)
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| 77 |
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| 78 | #define raw_cpu_generic_add_return(pcp, val) \
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| 79 | ({ \
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| 80 | typeof(&(pcp)) __p = raw_cpu_ptr(&(pcp)); \
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| 81 | \
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| 82 | *__p += val; \
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| 83 | *__p; \
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| 84 | })
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| 85 |
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| 86 | #define raw_cpu_generic_xchg(pcp, nval) \
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| 87 | ({ \
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| 88 | typeof(&(pcp)) __p = raw_cpu_ptr(&(pcp)); \
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| 89 | typeof(pcp) __ret; \
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| 90 | __ret = *__p; \
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| 91 | *__p = nval; \
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| 92 | __ret; \
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| 93 | })
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| 94 |
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| 95 | #define raw_cpu_generic_cmpxchg(pcp, oval, nval) \
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| 96 | ({ \
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| 97 | typeof(&(pcp)) __p = raw_cpu_ptr(&(pcp)); \
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| 98 | typeof(pcp) __ret; \
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| 99 | __ret = *__p; \
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| 100 | if (__ret == (oval)) \
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| 101 | *__p = nval; \
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| 102 | __ret; \
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| 103 | })
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| 104 |
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| 105 | #define raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \
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| 106 | ({ \
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| 107 | typeof(&(pcp1)) __p1 = raw_cpu_ptr(&(pcp1)); \
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| 108 | typeof(&(pcp2)) __p2 = raw_cpu_ptr(&(pcp2)); \
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| 109 | int __ret = 0; \
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| 110 | if (*__p1 == (oval1) && *__p2 == (oval2)) { \
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| 111 | *__p1 = nval1; \
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| 112 | *__p2 = nval2; \
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| 113 | __ret = 1; \
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| 114 | } \
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| 115 | (__ret); \
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| 116 | })
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| 117 |
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| 118 | #define this_cpu_generic_read(pcp) \
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| 119 | ({ \
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| 120 | typeof(pcp) __ret; \
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| 121 | preempt_disable_notrace(); \
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| 122 | __ret = raw_cpu_generic_read(pcp); \
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| 123 | preempt_enable_notrace(); \
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| 124 | __ret; \
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| 125 | })
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| 126 |
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| 127 | #define this_cpu_generic_to_op(pcp, val, op) \
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| 128 | do { \
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| 129 | unsigned long __flags; \
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| 130 | raw_local_irq_save(__flags); \
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| 131 | raw_cpu_generic_to_op(pcp, val, op); \
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| 132 | raw_local_irq_restore(__flags); \
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| 133 | } while (0)
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| 134 |
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| 135 |
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| 136 | #define this_cpu_generic_add_return(pcp, val) \
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| 137 | ({ \
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| 138 | typeof(pcp) __ret; \
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| 139 | unsigned long __flags; \
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| 140 | raw_local_irq_save(__flags); \
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| 141 | __ret = raw_cpu_generic_add_return(pcp, val); \
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| 142 | raw_local_irq_restore(__flags); \
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| 143 | __ret; \
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| 144 | })
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| 145 |
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| 146 | #define this_cpu_generic_xchg(pcp, nval) \
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| 147 | ({ \
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| 148 | typeof(pcp) __ret; \
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| 149 | unsigned long __flags; \
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| 150 | raw_local_irq_save(__flags); \
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| 151 | __ret = raw_cpu_generic_xchg(pcp, nval); \
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| 152 | raw_local_irq_restore(__flags); \
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| 153 | __ret; \
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| 154 | })
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| 155 |
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| 156 | #define this_cpu_generic_cmpxchg(pcp, oval, nval) \
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| 157 | ({ \
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| 158 | typeof(pcp) __ret; \
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| 159 | unsigned long __flags; \
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| 160 | raw_local_irq_save(__flags); \
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| 161 | __ret = raw_cpu_generic_cmpxchg(pcp, oval, nval); \
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| 162 | raw_local_irq_restore(__flags); \
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| 163 | __ret; \
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| 164 | })
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| 165 |
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| 166 | #define this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \
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| 167 | ({ \
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| 168 | int __ret; \
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| 169 | unsigned long __flags; \
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| 170 | raw_local_irq_save(__flags); \
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| 171 | __ret = raw_cpu_generic_cmpxchg_double(pcp1, pcp2, \
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| 172 | oval1, oval2, nval1, nval2); \
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| 173 | raw_local_irq_restore(__flags); \
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| 174 | __ret; \
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| 175 | })
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| 176 |
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| 177 | #ifndef raw_cpu_read_1
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| 178 | #define raw_cpu_read_1(pcp) raw_cpu_generic_read(pcp)
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| 179 | #endif
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| 180 | #ifndef raw_cpu_read_2
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| 181 | #define raw_cpu_read_2(pcp) raw_cpu_generic_read(pcp)
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| 182 | #endif
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| 183 | #ifndef raw_cpu_read_4
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| 184 | #define raw_cpu_read_4(pcp) raw_cpu_generic_read(pcp)
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| 185 | #endif
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| 186 | #ifndef raw_cpu_read_8
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| 187 | #define raw_cpu_read_8(pcp) raw_cpu_generic_read(pcp)
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| 188 | #endif
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| 189 |
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| 190 | #ifndef raw_cpu_write_1
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| 191 | #define raw_cpu_write_1(pcp, val) raw_cpu_generic_to_op(pcp, val, =)
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| 192 | #endif
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| 193 | #ifndef raw_cpu_write_2
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| 194 | #define raw_cpu_write_2(pcp, val) raw_cpu_generic_to_op(pcp, val, =)
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| 195 | #endif
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| 196 | #ifndef raw_cpu_write_4
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| 197 | #define raw_cpu_write_4(pcp, val) raw_cpu_generic_to_op(pcp, val, =)
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| 198 | #endif
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| 199 | #ifndef raw_cpu_write_8
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| 200 | #define raw_cpu_write_8(pcp, val) raw_cpu_generic_to_op(pcp, val, =)
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| 201 | #endif
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| 202 |
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| 203 | #ifndef raw_cpu_add_1
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| 204 | #define raw_cpu_add_1(pcp, val) raw_cpu_generic_to_op(pcp, val, +=)
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| 205 | #endif
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| 206 | #ifndef raw_cpu_add_2
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| 207 | #define raw_cpu_add_2(pcp, val) raw_cpu_generic_to_op(pcp, val, +=)
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| 208 | #endif
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| 209 | #ifndef raw_cpu_add_4
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| 210 | #define raw_cpu_add_4(pcp, val) raw_cpu_generic_to_op(pcp, val, +=)
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| 211 | #endif
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| 212 | #ifndef raw_cpu_add_8
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| 213 | #define raw_cpu_add_8(pcp, val) raw_cpu_generic_to_op(pcp, val, +=)
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| 214 | #endif
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| 215 |
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| 216 | #ifndef raw_cpu_and_1
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| 217 | #define raw_cpu_and_1(pcp, val) raw_cpu_generic_to_op(pcp, val, &=)
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| 218 | #endif
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| 219 | #ifndef raw_cpu_and_2
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| 220 | #define raw_cpu_and_2(pcp, val) raw_cpu_generic_to_op(pcp, val, &=)
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| 221 | #endif
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| 222 | #ifndef raw_cpu_and_4
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| 223 | #define raw_cpu_and_4(pcp, val) raw_cpu_generic_to_op(pcp, val, &=)
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| 224 | #endif
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| 225 | #ifndef raw_cpu_and_8
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| 226 | #define raw_cpu_and_8(pcp, val) raw_cpu_generic_to_op(pcp, val, &=)
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| 227 | #endif
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| 228 |
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| 229 | #ifndef raw_cpu_or_1
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| 230 | #define raw_cpu_or_1(pcp, val) raw_cpu_generic_to_op(pcp, val, |=)
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| 231 | #endif
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| 232 | #ifndef raw_cpu_or_2
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| 233 | #define raw_cpu_or_2(pcp, val) raw_cpu_generic_to_op(pcp, val, |=)
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| 234 | #endif
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| 235 | #ifndef raw_cpu_or_4
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| 236 | #define raw_cpu_or_4(pcp, val) raw_cpu_generic_to_op(pcp, val, |=)
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| 237 | #endif
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| 238 | #ifndef raw_cpu_or_8
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| 239 | #define raw_cpu_or_8(pcp, val) raw_cpu_generic_to_op(pcp, val, |=)
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| 240 | #endif
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| 241 |
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| 242 | #ifndef raw_cpu_add_return_1
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| 243 | #define raw_cpu_add_return_1(pcp, val) raw_cpu_generic_add_return(pcp, val)
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| 244 | #endif
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| 245 | #ifndef raw_cpu_add_return_2
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| 246 | #define raw_cpu_add_return_2(pcp, val) raw_cpu_generic_add_return(pcp, val)
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| 247 | #endif
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| 248 | #ifndef raw_cpu_add_return_4
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| 249 | #define raw_cpu_add_return_4(pcp, val) raw_cpu_generic_add_return(pcp, val)
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| 250 | #endif
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| 251 | #ifndef raw_cpu_add_return_8
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| 252 | #define raw_cpu_add_return_8(pcp, val) raw_cpu_generic_add_return(pcp, val)
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| 253 | #endif
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| 254 |
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| 255 | #ifndef raw_cpu_xchg_1
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| 256 | #define raw_cpu_xchg_1(pcp, nval) raw_cpu_generic_xchg(pcp, nval)
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| 257 | #endif
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| 258 | #ifndef raw_cpu_xchg_2
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| 259 | #define raw_cpu_xchg_2(pcp, nval) raw_cpu_generic_xchg(pcp, nval)
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| 260 | #endif
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| 261 | #ifndef raw_cpu_xchg_4
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| 262 | #define raw_cpu_xchg_4(pcp, nval) raw_cpu_generic_xchg(pcp, nval)
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| 263 | #endif
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| 264 | #ifndef raw_cpu_xchg_8
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| 265 | #define raw_cpu_xchg_8(pcp, nval) raw_cpu_generic_xchg(pcp, nval)
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| 266 | #endif
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| 267 |
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| 268 | #ifndef raw_cpu_cmpxchg_1
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| 269 | #define raw_cpu_cmpxchg_1(pcp, oval, nval) \
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| 270 | raw_cpu_generic_cmpxchg(pcp, oval, nval)
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| 271 | #endif
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| 272 | #ifndef raw_cpu_cmpxchg_2
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| 273 | #define raw_cpu_cmpxchg_2(pcp, oval, nval) \
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| 274 | raw_cpu_generic_cmpxchg(pcp, oval, nval)
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| 275 | #endif
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| 276 | #ifndef raw_cpu_cmpxchg_4
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| 277 | #define raw_cpu_cmpxchg_4(pcp, oval, nval) \
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| 278 | raw_cpu_generic_cmpxchg(pcp, oval, nval)
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| 279 | #endif
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| 280 | #ifndef raw_cpu_cmpxchg_8
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| 281 | #define raw_cpu_cmpxchg_8(pcp, oval, nval) \
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| 282 | raw_cpu_generic_cmpxchg(pcp, oval, nval)
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| 283 | #endif
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| 284 |
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| 285 | #ifndef raw_cpu_cmpxchg_double_1
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| 286 | #define raw_cpu_cmpxchg_double_1(pcp1, pcp2, oval1, oval2, nval1, nval2) \
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| 287 | raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
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| 288 | #endif
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| 289 | #ifndef raw_cpu_cmpxchg_double_2
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| 290 | #define raw_cpu_cmpxchg_double_2(pcp1, pcp2, oval1, oval2, nval1, nval2) \
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| 291 | raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
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| 292 | #endif
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| 293 | #ifndef raw_cpu_cmpxchg_double_4
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| 294 | #define raw_cpu_cmpxchg_double_4(pcp1, pcp2, oval1, oval2, nval1, nval2) \
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| 295 | raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
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| 296 | #endif
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| 297 | #ifndef raw_cpu_cmpxchg_double_8
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| 298 | #define raw_cpu_cmpxchg_double_8(pcp1, pcp2, oval1, oval2, nval1, nval2) \
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| 299 | raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
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| 300 | #endif
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| 301 |
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| 302 | #ifndef this_cpu_read_1
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| 303 | #define this_cpu_read_1(pcp) this_cpu_generic_read(pcp)
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| 304 | #endif
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| 305 | #ifndef this_cpu_read_2
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| 306 | #define this_cpu_read_2(pcp) this_cpu_generic_read(pcp)
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| 307 | #endif
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| 308 | #ifndef this_cpu_read_4
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| 309 | #define this_cpu_read_4(pcp) this_cpu_generic_read(pcp)
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| 310 | #endif
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| 311 | #ifndef this_cpu_read_8
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| 312 | #define this_cpu_read_8(pcp) this_cpu_generic_read(pcp)
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| 313 | #endif
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| 314 |
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| 315 | #ifndef this_cpu_write_1
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| 316 | #define this_cpu_write_1(pcp, val) this_cpu_generic_to_op(pcp, val, =)
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| 317 | #endif
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| 318 | #ifndef this_cpu_write_2
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| 319 | #define this_cpu_write_2(pcp, val) this_cpu_generic_to_op(pcp, val, =)
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| 320 | #endif
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| 321 | #ifndef this_cpu_write_4
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| 322 | #define this_cpu_write_4(pcp, val) this_cpu_generic_to_op(pcp, val, =)
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| 323 | #endif
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| 324 | #ifndef this_cpu_write_8
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| 325 | #define this_cpu_write_8(pcp, val) this_cpu_generic_to_op(pcp, val, =)
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| 326 | #endif
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| 327 |
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| 328 | #ifndef this_cpu_add_1
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| 329 | #define this_cpu_add_1(pcp, val) this_cpu_generic_to_op(pcp, val, +=)
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| 330 | #endif
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| 331 | #ifndef this_cpu_add_2
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| 332 | #define this_cpu_add_2(pcp, val) this_cpu_generic_to_op(pcp, val, +=)
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| 333 | #endif
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| 334 | #ifndef this_cpu_add_4
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| 335 | #define this_cpu_add_4(pcp, val) this_cpu_generic_to_op(pcp, val, +=)
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| 336 | #endif
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| 337 | #ifndef this_cpu_add_8
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| 338 | #define this_cpu_add_8(pcp, val) this_cpu_generic_to_op(pcp, val, +=)
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| 339 | #endif
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| 340 |
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| 341 | #ifndef this_cpu_and_1
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| 342 | #define this_cpu_and_1(pcp, val) this_cpu_generic_to_op(pcp, val, &=)
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| 343 | #endif
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| 344 | #ifndef this_cpu_and_2
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| 345 | #define this_cpu_and_2(pcp, val) this_cpu_generic_to_op(pcp, val, &=)
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| 346 | #endif
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| 347 | #ifndef this_cpu_and_4
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| 348 | #define this_cpu_and_4(pcp, val) this_cpu_generic_to_op(pcp, val, &=)
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| 349 | #endif
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| 350 | #ifndef this_cpu_and_8
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| 351 | #define this_cpu_and_8(pcp, val) this_cpu_generic_to_op(pcp, val, &=)
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| 352 | #endif
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| 353 |
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| 354 | #ifndef this_cpu_or_1
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| 355 | #define this_cpu_or_1(pcp, val) this_cpu_generic_to_op(pcp, val, |=)
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| 356 | #endif
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| 357 | #ifndef this_cpu_or_2
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| 358 | #define this_cpu_or_2(pcp, val) this_cpu_generic_to_op(pcp, val, |=)
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| 359 | #endif
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| 360 | #ifndef this_cpu_or_4
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| 361 | #define this_cpu_or_4(pcp, val) this_cpu_generic_to_op(pcp, val, |=)
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| 362 | #endif
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| 363 | #ifndef this_cpu_or_8
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| 364 | #define this_cpu_or_8(pcp, val) this_cpu_generic_to_op(pcp, val, |=)
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| 365 | #endif
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| 366 |
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| 367 | #ifndef this_cpu_add_return_1
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| 368 | #define this_cpu_add_return_1(pcp, val) this_cpu_generic_add_return(pcp, val)
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| 369 | #endif
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| 370 | #ifndef this_cpu_add_return_2
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| 371 | #define this_cpu_add_return_2(pcp, val) this_cpu_generic_add_return(pcp, val)
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| 372 | #endif
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| 373 | #ifndef this_cpu_add_return_4
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| 374 | #define this_cpu_add_return_4(pcp, val) this_cpu_generic_add_return(pcp, val)
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| 375 | #endif
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| 376 | #ifndef this_cpu_add_return_8
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| 377 | #define this_cpu_add_return_8(pcp, val) this_cpu_generic_add_return(pcp, val)
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| 378 | #endif
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| 379 |
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| 380 | #ifndef this_cpu_xchg_1
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| 381 | #define this_cpu_xchg_1(pcp, nval) this_cpu_generic_xchg(pcp, nval)
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| 382 | #endif
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| 383 | #ifndef this_cpu_xchg_2
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| 384 | #define this_cpu_xchg_2(pcp, nval) this_cpu_generic_xchg(pcp, nval)
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| 385 | #endif
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| 386 | #ifndef this_cpu_xchg_4
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| 387 | #define this_cpu_xchg_4(pcp, nval) this_cpu_generic_xchg(pcp, nval)
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| 388 | #endif
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| 389 | #ifndef this_cpu_xchg_8
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| 390 | #define this_cpu_xchg_8(pcp, nval) this_cpu_generic_xchg(pcp, nval)
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| 391 | #endif
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| 392 |
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| 393 | #ifndef this_cpu_cmpxchg_1
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| 394 | #define this_cpu_cmpxchg_1(pcp, oval, nval) \
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| 395 | this_cpu_generic_cmpxchg(pcp, oval, nval)
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| 396 | #endif
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| 397 | #ifndef this_cpu_cmpxchg_2
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| 398 | #define this_cpu_cmpxchg_2(pcp, oval, nval) \
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| 399 | this_cpu_generic_cmpxchg(pcp, oval, nval)
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| 400 | #endif
|
| 401 | #ifndef this_cpu_cmpxchg_4
|
| 402 | #define this_cpu_cmpxchg_4(pcp, oval, nval) \
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| 403 | this_cpu_generic_cmpxchg(pcp, oval, nval)
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| 404 | #endif
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| 405 | #ifndef this_cpu_cmpxchg_8
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| 406 | #define this_cpu_cmpxchg_8(pcp, oval, nval) \
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| 407 | this_cpu_generic_cmpxchg(pcp, oval, nval)
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| 408 | #endif
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| 409 |
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| 410 | #ifndef this_cpu_cmpxchg_double_1
|
| 411 | #define this_cpu_cmpxchg_double_1(pcp1, pcp2, oval1, oval2, nval1, nval2) \
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| 412 | this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
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| 413 | #endif
|
| 414 | #ifndef this_cpu_cmpxchg_double_2
|
| 415 | #define this_cpu_cmpxchg_double_2(pcp1, pcp2, oval1, oval2, nval1, nval2) \
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| 416 | this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
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| 417 | #endif
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| 418 | #ifndef this_cpu_cmpxchg_double_4
|
| 419 | #define this_cpu_cmpxchg_double_4(pcp1, pcp2, oval1, oval2, nval1, nval2) \
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| 420 | this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
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| 421 | #endif
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| 422 | #ifndef this_cpu_cmpxchg_double_8
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| 423 | #define this_cpu_cmpxchg_double_8(pcp1, pcp2, oval1, oval2, nval1, nval2) \
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| 424 | this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
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| 425 | #endif
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| 426 |
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| 427 | #endif
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