include/asm-x86/current.h

   1 #ifndef _X86_CURRENT_H
   2 #define _X86_CURRENT_H
   3
   4 #ifdef CONFIG_X86_32
   5 #include <linux/compiler.h>
   6 #include <asm/percpu.h>
   7
   8 struct task_struct;
   9
  10 DECLARE_PER_CPU(struct task_struct *, current_task);
  11 static __always_inline struct task_struct *get_current(void)
  12 {
  13         return x86_read_percpu(current_task);
  14 }
  15
  16 #else /* X86_32 */
  17
  18 #ifndef __ASSEMBLY__
  19 #include <asm/pda.h>
  20
  21 struct task_struct;
  22
  23 static __always_inline struct task_struct *get_current(void)
  24 {
  25         return read_pda(pcurrent);
  26 }
  27
  28 #else /* __ASSEMBLY__ */
  29
  30 #include <asm/asm-offsets.h>
  31 #define GET_CURRENT(reg) movq %gs:(pda_pcurrent),reg
  32
  33 #endif /* __ASSEMBLY__ */
  34
  35 #endif /* X86_32 */
  36
  37 #define current get_current()
  38
  39 #endif /* X86_CURRENT_H */