From: Zong Li Date: Mon, 9 Mar 2020 16:55:42 +0000 (+0800) Subject: riscv: add macro to get instruction length X-Git-Tag: v5.7-rc1~37^2~22 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=b42d763a2d412d6ef7c29cb2f1b3e9985e2b1e38;p=linux-2.6-block.git riscv: add macro to get instruction length Extract the calculation of instruction length for common use. Signed-off-by: Zong Li Signed-off-by: Palmer Dabbelt --- diff --git a/arch/riscv/include/asm/bug.h b/arch/riscv/include/asm/bug.h index 75604fec1b1b..d6f1ec08d97b 100644 --- a/arch/riscv/include/asm/bug.h +++ b/arch/riscv/include/asm/bug.h @@ -19,6 +19,14 @@ #define __BUG_INSN_32 _UL(0x00100073) /* ebreak */ #define __BUG_INSN_16 _UL(0x9002) /* c.ebreak */ +#define GET_INSN_LENGTH(insn) \ +({ \ + unsigned long __len; \ + __len = ((insn & __INSN_LENGTH_MASK) == __INSN_LENGTH_32) ? \ + 4UL : 2UL; \ + __len; \ +}) + typedef u32 bug_insn_t; #ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS diff --git a/arch/riscv/kernel/traps.c b/arch/riscv/kernel/traps.c index ffb3d94bf0cc..a4d136355f78 100644 --- a/arch/riscv/kernel/traps.c +++ b/arch/riscv/kernel/traps.c @@ -118,7 +118,8 @@ static inline unsigned long get_break_insn_length(unsigned long pc) if (probe_kernel_address((bug_insn_t *)pc, insn)) return 0; - return (((insn & __INSN_LENGTH_MASK) == __INSN_LENGTH_32) ? 4UL : 2UL); + + return GET_INSN_LENGTH(insn); } asmlinkage __visible void do_trap_break(struct pt_regs *regs)