linux-kernel - Re: [PATCH 01/10] x86: Change size of APICIDs from u8 to u16

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Date:	Mon, 14 Jan 2008 10:22:42 -0800
From:	Mike Travis <travis@....com>
To:	Jan Engelhardt <jengelh@...putergmbh.de>
CC:	Andrew Morton <akpm@...ux-foundation.org>, Andi Kleen <ak@...e.de>,
	mingo@...e.hu, Christoph Lameter <clameter@....com>,
	Jack Steiner <steiner@....com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 01/10] x86: Change size of APICIDs from u8 to u16

Jan Engelhardt wrote:
> On Jan 13 2008 10:34, travis@....com wrote:
>> --- a/arch/x86/kernel/mpparse_64.c
>> +++ b/arch/x86/kernel/mpparse_64.c
>> @@ -132,7 +132,7 @@ static void __cpuinit MP_processor_info(
>> 	 * area is created.
>> 	 */
>> 	if (x86_cpu_to_apicid_ptr) {
>> -		u8 *x86_cpu_to_apicid = (u8 *)x86_cpu_to_apicid_ptr;
>> +		u16 *x86_cpu_to_apicid = (u16 *)x86_cpu_to_apicid_ptr;
>> 		x86_cpu_to_apicid[cpu] = m->mpc_apicid;
>> 	} else {
>> 		per_cpu(x86_cpu_to_apicid, cpu) = m->mpc_apicid;
> 
> You can do away with the cast while modifying this line.

Thanks!  For some reason I had problems with the 'inter-section'
referencing and this slipped in while addressing that problem.

> 
>> --- a/arch/x86/mm/srat_64.c
>> +++ b/arch/x86/mm/srat_64.c
>> @@ -384,6 +388,12 @@ int __init acpi_scan_nodes(unsigned long
>> }
>>
>> #ifdef CONFIG_NUMA_EMU
>> +static int fake_node_to_pxm_map[MAX_NUMNODES] __initdata = {
>> +	[0 ... MAX_NUMNODES-1] = PXM_INVAL
>> +};
>> +static unsigned char fake_apicid_to_node[MAX_LOCAL_APIC] __initdata = {
>> +	[0 ... MAX_LOCAL_APIC-1] = NUMA_NO_NODE
>> +};
>> static int __init find_node_by_addr(unsigned long addr)
>> {
>> 	int ret = NUMA_NO_NODE;
> 
> No u8/u16 here?

Good point.

Thanks,
Mike

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