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author | David S. Miller <davem@davemloft.net> | 2009-04-16 20:35:26 -0400 |
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committer | David S. Miller <davem@davemloft.net> | 2009-04-16 20:35:26 -0400 |
commit | a54bfa40fd16aeb90bc556189221576f746f8567 (patch) | |
tree | 176bb7a99ffab5f42f0dd4e9671f335be3f3efa0 /include/asm-generic/percpu.h | |
parent | fe957c40ec5e2763b9977c565beab3bde3aaf85b (diff) | |
parent | 134ffb4cad92a6aa534e55a9be145bca780a32c1 (diff) |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Diffstat (limited to 'include/asm-generic/percpu.h')
-rw-r--r-- | include/asm-generic/percpu.h | 52 |
1 files changed, 0 insertions, 52 deletions
diff --git a/include/asm-generic/percpu.h b/include/asm-generic/percpu.h index 00f45ff081a6..b0e63c672ebd 100644 --- a/include/asm-generic/percpu.h +++ b/include/asm-generic/percpu.h | |||
@@ -80,56 +80,4 @@ extern void setup_per_cpu_areas(void); | |||
80 | #define DECLARE_PER_CPU(type, name) extern PER_CPU_ATTRIBUTES \ | 80 | #define DECLARE_PER_CPU(type, name) extern PER_CPU_ATTRIBUTES \ |
81 | __typeof__(type) per_cpu_var(name) | 81 | __typeof__(type) per_cpu_var(name) |
82 | 82 | ||
83 | /* | ||
84 | * Optional methods for optimized non-lvalue per-cpu variable access. | ||
85 | * | ||
86 | * @var can be a percpu variable or a field of it and its size should | ||
87 | * equal char, int or long. percpu_read() evaluates to a lvalue and | ||
88 | * all others to void. | ||
89 | * | ||
90 | * These operations are guaranteed to be atomic w.r.t. preemption. | ||
91 | * The generic versions use plain get/put_cpu_var(). Archs are | ||
92 | * encouraged to implement single-instruction alternatives which don't | ||
93 | * require preemption protection. | ||
94 | */ | ||
95 | #ifndef percpu_read | ||
96 | # define percpu_read(var) \ | ||
97 | ({ \ | ||
98 | typeof(per_cpu_var(var)) __tmp_var__; \ | ||
99 | __tmp_var__ = get_cpu_var(var); \ | ||
100 | put_cpu_var(var); \ | ||
101 | __tmp_var__; \ | ||
102 | }) | ||
103 | #endif | ||
104 | |||
105 | #define __percpu_generic_to_op(var, val, op) \ | ||
106 | do { \ | ||
107 | get_cpu_var(var) op val; \ | ||
108 | put_cpu_var(var); \ | ||
109 | } while (0) | ||
110 | |||
111 | #ifndef percpu_write | ||
112 | # define percpu_write(var, val) __percpu_generic_to_op(var, (val), =) | ||
113 | #endif | ||
114 | |||
115 | #ifndef percpu_add | ||
116 | # define percpu_add(var, val) __percpu_generic_to_op(var, (val), +=) | ||
117 | #endif | ||
118 | |||
119 | #ifndef percpu_sub | ||
120 | # define percpu_sub(var, val) __percpu_generic_to_op(var, (val), -=) | ||
121 | #endif | ||
122 | |||
123 | #ifndef percpu_and | ||
124 | # define percpu_and(var, val) __percpu_generic_to_op(var, (val), &=) | ||
125 | #endif | ||
126 | |||
127 | #ifndef percpu_or | ||
128 | # define percpu_or(var, val) __percpu_generic_to_op(var, (val), |=) | ||
129 | #endif | ||
130 | |||
131 | #ifndef percpu_xor | ||
132 | # define percpu_xor(var, val) __percpu_generic_to_op(var, (val), ^=) | ||
133 | #endif | ||
134 | |||
135 | #endif /* _ASM_GENERIC_PERCPU_H_ */ | 83 | #endif /* _ASM_GENERIC_PERCPU_H_ */ |