3.16.57-rc1 review patch. If anyone has any objections, please let me know.
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From: "Maciej W. Rozycki" macro@linux-mips.org
commit 27e28e8ec47a5ce335ebf25d34ca356c80635908 upstream.
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 macro@linux-mips.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/9683/ Signed-off-by: Ralf Baechle ralf@linux-mips.org Signed-off-by: Ben Hutchings ben@decadent.org.uk --- arch/mips/kernel/traps.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-)
--- a/arch/mips/kernel/traps.c +++ b/arch/mips/kernel/traps.c @@ -1247,7 +1247,7 @@ asmlinkage void do_cpu(struct pt_regs *r status = -1;
if (unlikely(compute_return_epc(regs) < 0)) - goto out; + break;
if (get_isa16_mode(regs->cp0_epc)) { unsigned short mmop[2] = { 0 }; @@ -1280,7 +1280,7 @@ asmlinkage void do_cpu(struct pt_regs *r force_sig(status, current); }
- goto out; + break;
case 3: /* @@ -1296,8 +1296,10 @@ asmlinkage void do_cpu(struct pt_regs *r * 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: @@ -1320,16 +1322,13 @@ asmlinkage void do_cpu(struct pt_regs *r if (!process_fpemu_return(sig, fault_addr, fcr31) && !err) 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); }