Re: MIPS: return after handling coprocessor 2 exception

[David Daney <ddaney@xxxxxxxxxxxxxxxxxx>]

On 06/17/2010 06:25 AM, Jesper Nilsson wrote:
> Breaking here dropped us to the default code which always sends
> a SIGILL to the current process, no matter what the CU2 notifier says.
>
> Signed-off-by: Jesper Nilsson<jesper@xxxxxx>
> ---
>   traps.c |    2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
> index 8bdd6a6..8527808 100644
> --- a/arch/mips/kernel/traps.c
> +++ b/arch/mips/kernel/traps.c
> @@ -976,7 +976,7 @@ asmlinkage void do_cpu(struct pt_regs *regs)
>
>   	case 2:
>   		raw_notifier_call_chain(&cu2_chain, CU2_EXCEPTION, regs);
> -		break;
> +		return;

What happens when the call chain is empty, and the proper action *is* 
SIGILL?

David Daney