From e8f44c50dfe75315d1ff6efc837d62cbe7368c9b Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 17 Oct 2019 19:37:30 +0200 Subject: riscv: cleanup do_trap_break If we always compile the get_break_insn_length inline function we can remove the ifdefs and let dead code elimination take care of the warn branch that is now unreadable because the report_bug stub always returns BUG_TRAP_TYPE_BUG. Signed-off-by: Christoph Hellwig Reviewed-by: Anup Patel Signed-off-by: Paul Walmsley --- arch/riscv/kernel/traps.c | 26 ++++++-------------------- 1 file changed, 6 insertions(+), 20 deletions(-) (limited to 'arch') diff --git a/arch/riscv/kernel/traps.c b/arch/riscv/kernel/traps.c index 1ac75f7d0bff..10a17e545f43 100644 --- a/arch/riscv/kernel/traps.c +++ b/arch/riscv/kernel/traps.c @@ -111,7 +111,6 @@ DO_ERROR_INFO(do_trap_ecall_s, DO_ERROR_INFO(do_trap_ecall_m, SIGILL, ILL_ILLTRP, "environment call from M-mode"); -#ifdef CONFIG_GENERIC_BUG static inline unsigned long get_break_insn_length(unsigned long pc) { bug_insn_t insn; @@ -120,28 +119,15 @@ static inline unsigned long get_break_insn_length(unsigned long pc) return 0; return (((insn & __INSN_LENGTH_MASK) == __INSN_LENGTH_32) ? 4UL : 2UL); } -#endif /* CONFIG_GENERIC_BUG */ asmlinkage void do_trap_break(struct pt_regs *regs) { - if (user_mode(regs)) { - force_sig_fault(SIGTRAP, TRAP_BRKPT, - (void __user *)(regs->sepc)); - return; - } -#ifdef CONFIG_GENERIC_BUG - { - enum bug_trap_type type; - - type = report_bug(regs->sepc, regs); - if (type == BUG_TRAP_TYPE_WARN) { - regs->sepc += get_break_insn_length(regs->sepc); - return; - } - } -#endif /* CONFIG_GENERIC_BUG */ - - die(regs, "Kernel BUG"); + if (user_mode(regs)) + force_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *)regs->sepc); + else if (report_bug(regs->sepc, regs) == BUG_TRAP_TYPE_WARN) + regs->sepc += get_break_insn_length(regs->sepc); + else + die(regs, "Kernel BUG"); } #ifdef CONFIG_GENERIC_BUG -- cgit v1.2.3-59-g8ed1b