From 27e28e8ec47a5ce335ebf25d34ca356c80635908 Mon Sep 17 00:00:00 2001 From: "Maciej W. Rozycki" Date: Fri, 3 Apr 2015 23:25:08 +0100 Subject: [PATCH] MIPS: Normalise code flow in the CpU exception handler Changes applied to `do_cpu' over time reduced the use of the SIGILL issued with `force_sig' at the end to a single CU3 case only in the switch statement there. Move that `force_sig' call over to right where required then and toss out the pile of gotos now not needed to skip over the call, replacing them with regular breaks out of the switch. Signed-off-by: Maciej W. Rozycki Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/9683/ Signed-off-by: Ralf Baechle --- arch/mips/kernel/traps.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-) diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c index 2594e4b7c0c3..5e1f28779340 100644 --- a/arch/mips/kernel/traps.c +++ b/arch/mips/kernel/traps.c @@ -1312,7 +1312,7 @@ asmlinkage void do_cpu(struct pt_regs *regs) status = -1; if (unlikely(compute_return_epc(regs) < 0)) - goto out; + break; if (get_isa16_mode(regs->cp0_epc)) { unsigned short mmop[2] = { 0 }; @@ -1345,7 +1345,7 @@ asmlinkage void do_cpu(struct pt_regs *regs) force_sig(status, current); } - goto out; + break; case 3: /* @@ -1361,8 +1361,10 @@ asmlinkage void do_cpu(struct pt_regs *regs) * erroneously too, so they are covered by this choice * as well. */ - if (raw_cpu_has_fpu) + if (raw_cpu_has_fpu) { + force_sig(SIGILL, current); break; + } /* Fall through. */ case 1: @@ -1378,16 +1380,13 @@ asmlinkage void do_cpu(struct pt_regs *regs) mt_ase_fp_affinity(); } - goto out; + break; case 2: raw_notifier_call_chain(&cu2_chain, CU2_EXCEPTION, regs); - goto out; + break; } - force_sig(SIGILL, current); - -out: exception_exit(prev_state); }