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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5270 | serge | 1 | #ifndef _ASM_GENERIC_PERCPU_H_ |
| 2 | #define _ASM_GENERIC_PERCPU_H_ |
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| 3 | |||
| 4 | #include |
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| 5 | #include |
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| 6 | #include |
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| 7 | |||
| 8 | #ifdef CONFIG_SMP |
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| 9 | |||
| 10 | /* |
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| 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 | |||
| 20 | #define per_cpu_offset(x) (__per_cpu_offset[x]) |
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| 21 | #endif |
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| 22 | |||
| 23 | /* |
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| 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 | |||
| 38 | /* |
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| 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 | |||
| 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 | |||
| 50 | #endif /* SMP */ |
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| 51 | |||
| 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 | |||
| 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 | |||
| 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 | |||
| 68 | #define raw_cpu_generic_to_op(pcp, val, op) \ |
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| 69 | do { \ |
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| 70 | *raw_cpu_ptr(&(pcp)) op val; \ |
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| 71 | } while (0) |
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| 72 | |||
| 73 | #define raw_cpu_generic_add_return(pcp, val) \ |
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| 74 | ({ \ |
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| 75 | raw_cpu_add(pcp, val); \ |
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| 76 | raw_cpu_read(pcp); \ |
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| 77 | }) |
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| 78 | |||
| 79 | #define raw_cpu_generic_xchg(pcp, nval) \ |
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| 80 | ({ \ |
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| 81 | typeof(pcp) __ret; \ |
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| 82 | __ret = raw_cpu_read(pcp); \ |
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| 83 | raw_cpu_write(pcp, nval); \ |
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| 84 | __ret; \ |
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| 85 | }) |
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| 86 | |||
| 87 | #define raw_cpu_generic_cmpxchg(pcp, oval, nval) \ |
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| 88 | ({ \ |
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| 89 | typeof(pcp) __ret; \ |
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| 90 | __ret = raw_cpu_read(pcp); \ |
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| 91 | if (__ret == (oval)) \ |
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| 92 | raw_cpu_write(pcp, nval); \ |
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| 93 | __ret; \ |
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| 94 | }) |
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| 95 | |||
| 96 | #define raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \ |
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| 97 | ({ \ |
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| 98 | int __ret = 0; \ |
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| 99 | if (raw_cpu_read(pcp1) == (oval1) && \ |
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| 100 | raw_cpu_read(pcp2) == (oval2)) { \ |
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| 101 | raw_cpu_write(pcp1, nval1); \ |
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| 102 | raw_cpu_write(pcp2, nval2); \ |
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| 103 | __ret = 1; \ |
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| 104 | } \ |
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| 105 | (__ret); \ |
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| 106 | }) |
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| 107 | |||
| 108 | #define this_cpu_generic_read(pcp) \ |
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| 109 | ({ \ |
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| 110 | typeof(pcp) __ret; \ |
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| 111 | preempt_disable(); \ |
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| 112 | __ret = *this_cpu_ptr(&(pcp)); \ |
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| 113 | preempt_enable(); \ |
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| 114 | __ret; \ |
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| 115 | }) |
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| 116 | |||
| 117 | #define this_cpu_generic_to_op(pcp, val, op) \ |
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| 118 | do { \ |
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| 119 | unsigned long __flags; \ |
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| 120 | raw_local_irq_save(__flags); \ |
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| 121 | *raw_cpu_ptr(&(pcp)) op val; \ |
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| 122 | raw_local_irq_restore(__flags); \ |
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| 123 | } while (0) |
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| 124 | |||
| 125 | #define this_cpu_generic_add_return(pcp, val) \ |
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| 126 | ({ \ |
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| 127 | typeof(pcp) __ret; \ |
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| 128 | unsigned long __flags; \ |
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| 129 | raw_local_irq_save(__flags); \ |
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| 130 | raw_cpu_add(pcp, val); \ |
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| 131 | __ret = raw_cpu_read(pcp); \ |
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| 132 | raw_local_irq_restore(__flags); \ |
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| 133 | __ret; \ |
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| 134 | }) |
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| 135 | |||
| 136 | #define this_cpu_generic_xchg(pcp, nval) \ |
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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_read(pcp); \ |
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| 142 | raw_cpu_write(pcp, nval); \ |
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| 143 | raw_local_irq_restore(__flags); \ |
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| 144 | __ret; \ |
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| 145 | }) |
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| 146 | |||
| 147 | #define this_cpu_generic_cmpxchg(pcp, oval, nval) \ |
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| 148 | ({ \ |
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| 149 | typeof(pcp) __ret; \ |
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| 150 | unsigned long __flags; \ |
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| 151 | raw_local_irq_save(__flags); \ |
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| 152 | __ret = raw_cpu_read(pcp); \ |
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| 153 | if (__ret == (oval)) \ |
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| 154 | raw_cpu_write(pcp, nval); \ |
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| 155 | raw_local_irq_restore(__flags); \ |
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| 156 | __ret; \ |
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| 157 | }) |
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| 158 | |||
| 159 | #define this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \ |
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| 160 | ({ \ |
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| 161 | int __ret; \ |
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| 162 | unsigned long __flags; \ |
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| 163 | raw_local_irq_save(__flags); \ |
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| 164 | __ret = raw_cpu_generic_cmpxchg_double(pcp1, pcp2, \ |
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| 165 | oval1, oval2, nval1, nval2); \ |
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| 166 | raw_local_irq_restore(__flags); \ |
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| 167 | __ret; \ |
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| 168 | }) |
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| 169 | |||
| 170 | #ifndef raw_cpu_read_1 |
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| 171 | #define raw_cpu_read_1(pcp) (*raw_cpu_ptr(&(pcp))) |
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| 172 | #endif |
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| 173 | #ifndef raw_cpu_read_2 |
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| 174 | #define raw_cpu_read_2(pcp) (*raw_cpu_ptr(&(pcp))) |
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| 175 | #endif |
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| 176 | #ifndef raw_cpu_read_4 |
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| 177 | #define raw_cpu_read_4(pcp) (*raw_cpu_ptr(&(pcp))) |
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| 178 | #endif |
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| 179 | #ifndef raw_cpu_read_8 |
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| 180 | #define raw_cpu_read_8(pcp) (*raw_cpu_ptr(&(pcp))) |
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| 181 | #endif |
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| 182 | |||
| 183 | #ifndef raw_cpu_write_1 |
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| 184 | #define raw_cpu_write_1(pcp, val) raw_cpu_generic_to_op(pcp, val, =) |
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| 185 | #endif |
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| 186 | #ifndef raw_cpu_write_2 |
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| 187 | #define raw_cpu_write_2(pcp, val) raw_cpu_generic_to_op(pcp, val, =) |
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| 188 | #endif |
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| 189 | #ifndef raw_cpu_write_4 |
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| 190 | #define raw_cpu_write_4(pcp, val) raw_cpu_generic_to_op(pcp, val, =) |
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| 191 | #endif |
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| 192 | #ifndef raw_cpu_write_8 |
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| 193 | #define raw_cpu_write_8(pcp, val) raw_cpu_generic_to_op(pcp, val, =) |
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| 194 | #endif |
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| 195 | |||
| 196 | #ifndef raw_cpu_add_1 |
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| 197 | #define raw_cpu_add_1(pcp, val) raw_cpu_generic_to_op(pcp, val, +=) |
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| 198 | #endif |
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| 199 | #ifndef raw_cpu_add_2 |
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| 200 | #define raw_cpu_add_2(pcp, val) raw_cpu_generic_to_op(pcp, val, +=) |
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| 201 | #endif |
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| 202 | #ifndef raw_cpu_add_4 |
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| 203 | #define raw_cpu_add_4(pcp, val) raw_cpu_generic_to_op(pcp, val, +=) |
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| 204 | #endif |
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| 205 | #ifndef raw_cpu_add_8 |
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| 206 | #define raw_cpu_add_8(pcp, val) raw_cpu_generic_to_op(pcp, val, +=) |
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| 207 | #endif |
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| 208 | |||
| 209 | #ifndef raw_cpu_and_1 |
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| 210 | #define raw_cpu_and_1(pcp, val) raw_cpu_generic_to_op(pcp, val, &=) |
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| 211 | #endif |
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| 212 | #ifndef raw_cpu_and_2 |
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| 213 | #define raw_cpu_and_2(pcp, val) raw_cpu_generic_to_op(pcp, val, &=) |
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| 214 | #endif |
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| 215 | #ifndef raw_cpu_and_4 |
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| 216 | #define raw_cpu_and_4(pcp, val) raw_cpu_generic_to_op(pcp, val, &=) |
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| 217 | #endif |
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| 218 | #ifndef raw_cpu_and_8 |
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| 219 | #define raw_cpu_and_8(pcp, val) raw_cpu_generic_to_op(pcp, val, &=) |
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| 220 | #endif |
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| 221 | |||
| 222 | #ifndef raw_cpu_or_1 |
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| 223 | #define raw_cpu_or_1(pcp, val) raw_cpu_generic_to_op(pcp, val, |=) |
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| 224 | #endif |
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| 225 | #ifndef raw_cpu_or_2 |
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| 226 | #define raw_cpu_or_2(pcp, val) raw_cpu_generic_to_op(pcp, val, |=) |
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| 227 | #endif |
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| 228 | #ifndef raw_cpu_or_4 |
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| 229 | #define raw_cpu_or_4(pcp, val) raw_cpu_generic_to_op(pcp, val, |=) |
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| 230 | #endif |
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| 231 | #ifndef raw_cpu_or_8 |
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| 232 | #define raw_cpu_or_8(pcp, val) raw_cpu_generic_to_op(pcp, val, |=) |
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| 233 | #endif |
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| 234 | |||
| 235 | #ifndef raw_cpu_add_return_1 |
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| 236 | #define raw_cpu_add_return_1(pcp, val) raw_cpu_generic_add_return(pcp, val) |
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| 237 | #endif |
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| 238 | #ifndef raw_cpu_add_return_2 |
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| 239 | #define raw_cpu_add_return_2(pcp, val) raw_cpu_generic_add_return(pcp, val) |
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| 240 | #endif |
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| 241 | #ifndef raw_cpu_add_return_4 |
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| 242 | #define raw_cpu_add_return_4(pcp, val) raw_cpu_generic_add_return(pcp, val) |
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| 243 | #endif |
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| 244 | #ifndef raw_cpu_add_return_8 |
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| 245 | #define raw_cpu_add_return_8(pcp, val) raw_cpu_generic_add_return(pcp, val) |
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| 246 | #endif |
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| 247 | |||
| 248 | #ifndef raw_cpu_xchg_1 |
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| 249 | #define raw_cpu_xchg_1(pcp, nval) raw_cpu_generic_xchg(pcp, nval) |
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| 250 | #endif |
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| 251 | #ifndef raw_cpu_xchg_2 |
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| 252 | #define raw_cpu_xchg_2(pcp, nval) raw_cpu_generic_xchg(pcp, nval) |
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| 253 | #endif |
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| 254 | #ifndef raw_cpu_xchg_4 |
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| 255 | #define raw_cpu_xchg_4(pcp, nval) raw_cpu_generic_xchg(pcp, nval) |
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| 256 | #endif |
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| 257 | #ifndef raw_cpu_xchg_8 |
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| 258 | #define raw_cpu_xchg_8(pcp, nval) raw_cpu_generic_xchg(pcp, nval) |
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| 259 | #endif |
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| 260 | |||
| 261 | #ifndef raw_cpu_cmpxchg_1 |
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| 262 | #define raw_cpu_cmpxchg_1(pcp, oval, nval) \ |
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| 263 | raw_cpu_generic_cmpxchg(pcp, oval, nval) |
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| 264 | #endif |
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| 265 | #ifndef raw_cpu_cmpxchg_2 |
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| 266 | #define raw_cpu_cmpxchg_2(pcp, oval, nval) \ |
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| 267 | raw_cpu_generic_cmpxchg(pcp, oval, nval) |
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| 268 | #endif |
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| 269 | #ifndef raw_cpu_cmpxchg_4 |
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| 270 | #define raw_cpu_cmpxchg_4(pcp, oval, nval) \ |
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| 271 | raw_cpu_generic_cmpxchg(pcp, oval, nval) |
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| 272 | #endif |
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| 273 | #ifndef raw_cpu_cmpxchg_8 |
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| 274 | #define raw_cpu_cmpxchg_8(pcp, oval, nval) \ |
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| 275 | raw_cpu_generic_cmpxchg(pcp, oval, nval) |
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| 276 | #endif |
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| 277 | |||
| 278 | #ifndef raw_cpu_cmpxchg_double_1 |
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| 279 | #define raw_cpu_cmpxchg_double_1(pcp1, pcp2, oval1, oval2, nval1, nval2) \ |
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| 280 | raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) |
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| 281 | #endif |
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| 282 | #ifndef raw_cpu_cmpxchg_double_2 |
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| 283 | #define raw_cpu_cmpxchg_double_2(pcp1, pcp2, oval1, oval2, nval1, nval2) \ |
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| 284 | raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) |
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| 285 | #endif |
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| 286 | #ifndef raw_cpu_cmpxchg_double_4 |
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| 287 | #define raw_cpu_cmpxchg_double_4(pcp1, pcp2, oval1, oval2, nval1, nval2) \ |
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| 288 | raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) |
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| 289 | #endif |
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| 290 | #ifndef raw_cpu_cmpxchg_double_8 |
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| 291 | #define raw_cpu_cmpxchg_double_8(pcp1, pcp2, oval1, oval2, nval1, nval2) \ |
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| 292 | raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) |
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| 293 | #endif |
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| 294 | |||
| 295 | #ifndef this_cpu_read_1 |
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| 296 | #define this_cpu_read_1(pcp) this_cpu_generic_read(pcp) |
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| 297 | #endif |
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| 298 | #ifndef this_cpu_read_2 |
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| 299 | #define this_cpu_read_2(pcp) this_cpu_generic_read(pcp) |
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| 300 | #endif |
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| 301 | #ifndef this_cpu_read_4 |
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| 302 | #define this_cpu_read_4(pcp) this_cpu_generic_read(pcp) |
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| 303 | #endif |
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| 304 | #ifndef this_cpu_read_8 |
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| 305 | #define this_cpu_read_8(pcp) this_cpu_generic_read(pcp) |
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| 306 | #endif |
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| 307 | |||
| 308 | #ifndef this_cpu_write_1 |
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| 309 | #define this_cpu_write_1(pcp, val) this_cpu_generic_to_op(pcp, val, =) |
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| 310 | #endif |
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| 311 | #ifndef this_cpu_write_2 |
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| 312 | #define this_cpu_write_2(pcp, val) this_cpu_generic_to_op(pcp, val, =) |
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| 313 | #endif |
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| 314 | #ifndef this_cpu_write_4 |
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| 315 | #define this_cpu_write_4(pcp, val) this_cpu_generic_to_op(pcp, val, =) |
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| 316 | #endif |
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| 317 | #ifndef this_cpu_write_8 |
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| 318 | #define this_cpu_write_8(pcp, val) this_cpu_generic_to_op(pcp, val, =) |
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| 319 | #endif |
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| 320 | |||
| 321 | #ifndef this_cpu_add_1 |
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| 322 | #define this_cpu_add_1(pcp, val) this_cpu_generic_to_op(pcp, val, +=) |
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| 323 | #endif |
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| 324 | #ifndef this_cpu_add_2 |
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| 325 | #define this_cpu_add_2(pcp, val) this_cpu_generic_to_op(pcp, val, +=) |
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| 326 | #endif |
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| 327 | #ifndef this_cpu_add_4 |
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| 328 | #define this_cpu_add_4(pcp, val) this_cpu_generic_to_op(pcp, val, +=) |
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| 329 | #endif |
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| 330 | #ifndef this_cpu_add_8 |
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| 331 | #define this_cpu_add_8(pcp, val) this_cpu_generic_to_op(pcp, val, +=) |
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| 332 | #endif |
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| 333 | |||
| 334 | #ifndef this_cpu_and_1 |
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| 335 | #define this_cpu_and_1(pcp, val) this_cpu_generic_to_op(pcp, val, &=) |
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| 336 | #endif |
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| 337 | #ifndef this_cpu_and_2 |
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| 338 | #define this_cpu_and_2(pcp, val) this_cpu_generic_to_op(pcp, val, &=) |
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| 339 | #endif |
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| 340 | #ifndef this_cpu_and_4 |
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| 341 | #define this_cpu_and_4(pcp, val) this_cpu_generic_to_op(pcp, val, &=) |
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| 342 | #endif |
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| 343 | #ifndef this_cpu_and_8 |
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| 344 | #define this_cpu_and_8(pcp, val) this_cpu_generic_to_op(pcp, val, &=) |
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| 345 | #endif |
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| 346 | |||
| 347 | #ifndef this_cpu_or_1 |
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| 348 | #define this_cpu_or_1(pcp, val) this_cpu_generic_to_op(pcp, val, |=) |
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| 349 | #endif |
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| 350 | #ifndef this_cpu_or_2 |
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| 351 | #define this_cpu_or_2(pcp, val) this_cpu_generic_to_op(pcp, val, |=) |
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| 352 | #endif |
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| 353 | #ifndef this_cpu_or_4 |
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| 354 | #define this_cpu_or_4(pcp, val) this_cpu_generic_to_op(pcp, val, |=) |
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| 355 | #endif |
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| 356 | #ifndef this_cpu_or_8 |
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| 357 | #define this_cpu_or_8(pcp, val) this_cpu_generic_to_op(pcp, val, |=) |
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| 358 | #endif |
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| 359 | |||
| 360 | #ifndef this_cpu_add_return_1 |
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| 361 | #define this_cpu_add_return_1(pcp, val) this_cpu_generic_add_return(pcp, val) |
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| 362 | #endif |
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| 363 | #ifndef this_cpu_add_return_2 |
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| 364 | #define this_cpu_add_return_2(pcp, val) this_cpu_generic_add_return(pcp, val) |
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| 365 | #endif |
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| 366 | #ifndef this_cpu_add_return_4 |
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| 367 | #define this_cpu_add_return_4(pcp, val) this_cpu_generic_add_return(pcp, val) |
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| 368 | #endif |
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| 369 | #ifndef this_cpu_add_return_8 |
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| 370 | #define this_cpu_add_return_8(pcp, val) this_cpu_generic_add_return(pcp, val) |
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| 371 | #endif |
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| 372 | |||
| 373 | #ifndef this_cpu_xchg_1 |
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| 374 | #define this_cpu_xchg_1(pcp, nval) this_cpu_generic_xchg(pcp, nval) |
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| 375 | #endif |
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| 376 | #ifndef this_cpu_xchg_2 |
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| 377 | #define this_cpu_xchg_2(pcp, nval) this_cpu_generic_xchg(pcp, nval) |
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| 378 | #endif |
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| 379 | #ifndef this_cpu_xchg_4 |
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| 380 | #define this_cpu_xchg_4(pcp, nval) this_cpu_generic_xchg(pcp, nval) |
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| 381 | #endif |
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| 382 | #ifndef this_cpu_xchg_8 |
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| 383 | #define this_cpu_xchg_8(pcp, nval) this_cpu_generic_xchg(pcp, nval) |
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| 384 | #endif |
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| 385 | |||
| 386 | #ifndef this_cpu_cmpxchg_1 |
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| 387 | #define this_cpu_cmpxchg_1(pcp, oval, nval) \ |
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| 388 | this_cpu_generic_cmpxchg(pcp, oval, nval) |
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| 389 | #endif |
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| 390 | #ifndef this_cpu_cmpxchg_2 |
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| 391 | #define this_cpu_cmpxchg_2(pcp, oval, nval) \ |
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| 392 | this_cpu_generic_cmpxchg(pcp, oval, nval) |
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| 393 | #endif |
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| 394 | #ifndef this_cpu_cmpxchg_4 |
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| 395 | #define this_cpu_cmpxchg_4(pcp, oval, nval) \ |
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| 396 | this_cpu_generic_cmpxchg(pcp, oval, nval) |
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| 397 | #endif |
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| 398 | #ifndef this_cpu_cmpxchg_8 |
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| 399 | #define this_cpu_cmpxchg_8(pcp, oval, nval) \ |
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| 400 | this_cpu_generic_cmpxchg(pcp, oval, nval) |
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| 401 | #endif |
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| 402 | |||
| 403 | #ifndef this_cpu_cmpxchg_double_1 |
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| 404 | #define this_cpu_cmpxchg_double_1(pcp1, pcp2, oval1, oval2, nval1, nval2) \ |
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| 405 | this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) |
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| 406 | #endif |
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| 407 | #ifndef this_cpu_cmpxchg_double_2 |
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| 408 | #define this_cpu_cmpxchg_double_2(pcp1, pcp2, oval1, oval2, nval1, nval2) \ |
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| 409 | this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) |
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| 410 | #endif |
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| 411 | #ifndef this_cpu_cmpxchg_double_4 |
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| 412 | #define this_cpu_cmpxchg_double_4(pcp1, pcp2, oval1, oval2, nval1, nval2) \ |
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| 413 | this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) |
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| 414 | #endif |
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| 415 | #ifndef this_cpu_cmpxchg_double_8 |
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| 416 | #define this_cpu_cmpxchg_double_8(pcp1, pcp2, oval1, oval2, nval1, nval2) \ |
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| 417 | this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) |
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| 418 | #endif |
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| 419 | |||
| 420 | #endif /* _ASM_GENERIC_PERCPU_H_ */ |