arch/arm64/include/asm/current.h

   1 #ifndef __ASM_CURRENT_H
   2 #define __ASM_CURRENT_H
   3
   4 #include <linux/compiler.h>
   5
   6 #include <asm/sysreg.h>
   7
   8 #ifndef __ASSEMBLY__
   9
  10 struct task_struct;
  11
  12 /*
  13  * We don't use read_sysreg() as we want the compiler to cache the value where
  14  * possible.
  15  */
  16 static __always_inline struct task_struct *get_current(void)
  17 {
  18         unsigned long sp_el0;
  19
  20         asm ("mrs %0, sp_el0" : "=r" (sp_el0));
  21
  22         return (struct task_struct *)sp_el0;
  23 }
  24
  25 #define current get_current()
  26
  27 #endif /* __ASSEMBLY__ */
  28
  29 #endif /* __ASM_CURRENT_H */
  30