Re: [patch 1/1] x86_64: Rename KDB_VECTOR to DEBUGGER_VECTOR

[Keith Owens <kaos@sgi.com>]

On Tue, 9 Aug 2005 01:16:37 +0200, 
Andi Kleen <ak@suse.de> wrote:
>On Tue, Aug 09, 2005 at 09:14:52AM +1000, Keith Owens wrote:
>> On Mon, 8 Aug 2005 21:28:50 +0200, 
>> Andi Kleen <ak@suse.de> wrote:
>> >On Mon, Aug 08, 2005 at 12:27:10PM -0700, Tom Rini wrote:
>> >>  {
>> >>  	unsigned int icr =  APIC_DM_FIXED | shortcut | vector | dest;
>> >> -	if (vector == KDB_VECTOR)
>> >> +	if (vector == NMI_VECTOR)
>> >>  		icr = (icr & (~APIC_VECTOR_MASK)) | APIC_DM_NMI;
>> >
>> >That if () should be removed since it's useless.
>> >Can you do that please?
>> 
>> Why is 'if ()' useless?  Remove the if test and all ipis get sent as
>> NMI, we definitely do not want that.
>
>The if () with its following line. The same result can be gotten
>by passing suitable arguments.

Arguments to what?  The path for sending the NMI_VECTOR is
send_IPI_allbutself -> {cluster,flat,physflat}_send_IPI_allbutself ->
{__send_IPI_shortcut, physflat_send_IPI_mask, cluster_send_IPI_mask} ->
send_IPI_mask_sequence -> __prepare_ICR.

Pushing the check for NMI_VECTOR any higher than __prepare_ICR needs
multiple tests for NMI_VECTOR.