include/asm-x86/percpu_64.h

   1 #ifndef _ASM_X8664_PERCPU_H_
   2 #define _ASM_X8664_PERCPU_H_
   3 #include <linux/compiler.h>
   4
   5 /* Same as asm-generic/percpu.h, except that we store the per cpu offset
   6    in the PDA. Longer term the PDA and every per cpu variable
   7    should be just put into a single section and referenced directly
   8    from %gs */
   9
  10 #ifdef CONFIG_SMP
  11
  12 #include <asm/pda.h>
  13
  14 #define __per_cpu_offset(cpu) (cpu_pda(cpu)->data_offset)
  15 #define __my_cpu_offset read_pda(data_offset)
  16
  17 #define per_cpu_offset(x) (__per_cpu_offset(x))
  18
  19 /* A macro to avoid #include hell... */
  20 #define percpu_modcopy(pcpudst, src, size)                      \
  21 do {                                                            \
  22         unsigned int __i;                                       \
  23         for_each_possible_cpu(__i)                              \
  24                 memcpy((pcpudst)+__per_cpu_offset(__i),         \
  25                        (src), (size));                          \
  26 } while (0)
  27
  28 #endif  /* SMP */
  29
  30 #include <asm-generic/percpu.h>
  31
  32 #endif /* _ASM_X8664_PERCPU_H_ */