arch/arm/kernel/jump_label.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/kernel.h>
   3 #include <linux/jump_label.h>
   4 #include <asm/patch.h>
   5 #include <asm/insn.h>
   6
   7 #ifdef HAVE_JUMP_LABEL
   8
   9 static void __arch_jump_label_transform(struct jump_entry *entry,
  10                                         enum jump_label_type type,
  11                                         bool is_static)
  12 {
  13         void *addr = (void *)entry->code;
  14         unsigned int insn;
  15
  16         if (type == JUMP_LABEL_JMP)
  17                 insn = arm_gen_branch(entry->code, entry->target);
  18         else
  19                 insn = arm_gen_nop();
  20
  21         if (is_static)
  22                 __patch_text_early(addr, insn);
  23         else
  24                 patch_text(addr, insn);
  25 }
  26
  27 void arch_jump_label_transform(struct jump_entry *entry,
  28                                enum jump_label_type type)
  29 {
  30         __arch_jump_label_transform(entry, type, false);
  31 }
  32
  33 void arch_jump_label_transform_static(struct jump_entry *entry,
  34                                       enum jump_label_type type)
  35 {
  36         __arch_jump_label_transform(entry, type, true);
  37 }
  38
  39 #endif