kernel/arch/sparc/include/asm/jump_label.h

   1 #ifndef _ASM_SPARC_JUMP_LABEL_H
   2 #define _ASM_SPARC_JUMP_LABEL_H
   3
   4 #ifndef __ASSEMBLY__
   5
   6 #include <linux/types.h>
   7
   8 #define JUMP_LABEL_NOP_SIZE 4
   9
  10 static __always_inline bool arch_static_branch(struct static_key *key, bool branch)
  11 {
  12         asm_volatile_goto("1:\n\t"
  13                  "nop\n\t"
  14                  "nop\n\t"
  15                  ".pushsection __jump_table,  \"aw\"\n\t"
  16                  ".align 4\n\t"
  17                  ".word 1b, %l[l_yes], %c0\n\t"
  18                  ".popsection \n\t"
  19                  : :  "i" (&((char *)key)[branch]) : : l_yes);
  20
  21         return false;
  22 l_yes:
  23         return true;
  24 }
  25
  26 static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch)
  27 {
  28         asm_volatile_goto("1:\n\t"
  29                  "b %l[l_yes]\n\t"
  30                  "nop\n\t"
  31                  ".pushsection __jump_table,  \"aw\"\n\t"
  32                  ".align 4\n\t"
  33                  ".word 1b, %l[l_yes], %c0\n\t"
  34                  ".popsection \n\t"
  35                  : :  "i" (&((char *)key)[branch]) : : l_yes);
  36
  37         return false;
  38 l_yes:
  39         return true;
  40 }
  41
  42 typedef u32 jump_label_t;
  43
  44 struct jump_entry {
  45         jump_label_t code;
  46         jump_label_t target;
  47         jump_label_t key;
  48 };
  49
  50 #endif  /* __ASSEMBLY__ */
  51 #endif