linux-kernel - Re: [patch] x86, apic: use 0x20 for the IRQ_MOVE_CLEANUP

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Date:	Fri, 08 Jan 2010 19:20:46 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	Suresh Siddha <suresh.b.siddha@...el.com>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	"ebiederm@...ssion.com" <ebiederm@...ssion.com>,
	"Maciej W. Rozycki" <macro@...ux-mips.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [patch] x86, apic: use 0x20 for the IRQ_MOVE_CLEANUP_VECTOR 
 instead of 0x1f

On 01/08/2010 07:07 PM, Yinghai Lu wrote:
>> diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
>> index d5bfa29..5c090a1 100644
>> --- a/arch/x86/kernel/apic/io_apic.c
>> +++ b/arch/x86/kernel/apic/io_apic.c
>> @@ -1162,8 +1162,8 @@ __assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask)
>>         * Also, we've got to be careful not to trash gate
>>         * 0x80, because int 0x80 is hm, kind of importantish. ;)
>>         */
>> -       static int current_vector = FIRST_DEVICE_VECTOR + VECTOR_OFFSET_START;
>> -       static int current_offset = VECTOR_OFFSET_START % 8;
>> +       static int current_vector = FIRST_DEVICE_VECTOR;
>> +       static int current_offset = 0;
>>        unsigned int old_vector;
>>        int cpu, err;
>>        cpumask_var_t tmp_mask;
>>
> 
> looks like it returned to first version i suggested?
> 
> http://lkml.org/lkml/2010/1/4/26
> 
> maybe we can just kill FIRST_DEVICE_VECTOR...
> 

As I already said, I really don't like reverting this bit.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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