root/arch/parisc/include/asm/jump_label.h

INCLUDED FROM

DEFINITIONS

1. arch_static_branch
2. arch_static_branch_jump

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_PARISC_JUMP_LABEL_H
   3 #define _ASM_PARISC_JUMP_LABEL_H
   4 
   5 #ifndef __ASSEMBLY__
   6 
   7 #include <linux/types.h>
   8 #include <asm/assembly.h>
   9 
  10 #define JUMP_LABEL_NOP_SIZE 4
  11 
  12 static __always_inline bool arch_static_branch(struct static_key *key, bool branch)
  13 {
  14         asm_volatile_goto("1:\n\t"
  15                  "nop\n\t"
  16                  ".pushsection __jump_table,  \"aw\"\n\t"
  17                  ".word 1b - ., %l[l_yes] - .\n\t"
  18                  __stringify(ASM_ULONG_INSN) " %c0 - .\n\t"
  19                  ".popsection\n\t"
  20                  : :  "i" (&((char *)key)[branch]) :  : l_yes);
  21 
  22         return false;
  23 l_yes:
  24         return true;
  25 }
  26 
  27 static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch)
  28 {
  29         asm_volatile_goto("1:\n\t"
  30                  "b,n %l[l_yes]\n\t"
  31                  ".pushsection __jump_table,  \"aw\"\n\t"
  32                  ".word 1b - ., %l[l_yes] - .\n\t"
  33                  __stringify(ASM_ULONG_INSN) " %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 #endif  /* __ASSEMBLY__ */
  43 #endif