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git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - include/asm-x86_64/local.h
1 #ifndef _ARCH_X8664_LOCAL_H
2 #define _ARCH_X8664_LOCAL_H
4 #include <linux/percpu.h>
8 volatile unsigned int counter
;
11 #define LOCAL_INIT(i) { (i) }
13 #define local_read(v) ((v)->counter)
14 #define local_set(v,i) (((v)->counter) = (i))
16 static __inline__
void local_inc(local_t
*v
)
24 static __inline__
void local_dec(local_t
*v
)
32 static __inline__
void local_add(unsigned long i
, local_t
*v
)
37 :"ir" (i
), "m" (v
->counter
));
40 static __inline__
void local_sub(unsigned long i
, local_t
*v
)
45 :"ir" (i
), "m" (v
->counter
));
48 /* On x86-64 these are better than the atomic variants on SMP kernels
49 because they dont use a lock prefix. */
50 #define __local_inc(l) local_inc(l)
51 #define __local_dec(l) local_dec(l)
52 #define __local_add(i,l) local_add((i),(l))
53 #define __local_sub(i,l) local_sub((i),(l))
55 /* Use these for per-cpu local_t variables: on some archs they are
56 * much more efficient than these naive implementations. Note they take
57 * a variable, not an address.
59 * This could be done better if we moved the per cpu data directly
62 #define cpu_local_read(v) local_read(&__get_cpu_var(v))
63 #define cpu_local_set(v, i) local_set(&__get_cpu_var(v), (i))
64 #define cpu_local_inc(v) local_inc(&__get_cpu_var(v))
65 #define cpu_local_dec(v) local_dec(&__get_cpu_var(v))
66 #define cpu_local_add(i, v) local_add((i), &__get_cpu_var(v))
67 #define cpu_local_sub(i, v) local_sub((i), &__get_cpu_var(v))
69 #define __cpu_local_inc(v) cpu_local_inc(v)
70 #define __cpu_local_dec(v) cpu_local_dec(v)
71 #define __cpu_local_add(i, v) cpu_local_add((i), (v))
72 #define __cpu_local_sub(i, v) cpu_local_sub((i), (v))
74 #endif /* _ARCH_I386_LOCAL_H */