#ifndef _ASM_ARM_JUMP_LABEL_H #define _ASM_ARM_JUMP_LABEL_H #ifdef __KERNEL__ #include <linux/types.h> #include <asm/system.h> #define JUMP_LABEL_NOP_SIZE 4 #ifdef CONFIG_THUMB2_KERNEL #define JUMP_LABEL_NOP "nop.w" #else #define JUMP_LABEL_NOP "nop" #endif static __always_inline bool arch_static_branch(struct static_key *key) { asm goto("1:\n\t" JUMP_LABEL_NOP "\n\t" ".pushsection __jump_table, \"aw\"\n\t" ".word 1b, %l[l_yes], %c0\n\t" ".popsection\n\t" : : "i" (key) : : l_yes); return false; l_yes: return true; } #endif /* __KERNEL__ */ typedef u32 jump_label_t; struct jump_entry { jump_label_t code; jump_label_t target; jump_label_t key; }; #endif