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 static void __arch_jump_label_transform(struct jump_entry *entry,
   8                                         enum jump_label_type type,
   9                                         bool is_static)
  10 {
  11         void *addr = (void *)entry->code;
  12         unsigned int insn;
  13
  14         if (type == JUMP_LABEL_JMP)
  15                 insn = arm_gen_branch(entry->code, entry->target);
  16         else
  17                 insn = arm_gen_nop();
  18
  19         if (is_static)
  20                 __patch_text_early(addr, insn);
  21         else
  22                 patch_text(addr, insn);
  23 }
  24
  25 void arch_jump_label_transform(struct jump_entry *entry,
  26                                enum jump_label_type type)
  27 {
  28         __arch_jump_label_transform(entry, type, false);
  29 }
  30
  31 void arch_jump_label_transform_static(struct jump_entry *entry,
  32                                       enum jump_label_type type)
  33 {
  34         __arch_jump_label_transform(entry, type, true);
  35 }