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x86/apic/uv: Update the APIC UV OEM check

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Optimize the first "SGI" OEM check to return faster if the
system is not an SGI or UV system.

Signed-off-by: Mike Travis <travis@sgi.com>
Acked-by: Hedi Berriche <hedi@sgi.com>
Acked-by: Dimitri Sivanich <sivanich@sgi.com>
Link: http://lkml.kernel.org/r/20150409182628.952357922@asylum.americas.sgi.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Mike Travis 2015-04-09 13:26:29 -05:00 committed by Ingo Molnar
parent 4399c03c67
commit 7a4e017041
1 changed files with 3 additions and 0 deletions
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arch/x86/kernel/apic/x2apic_uv_x.c
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@ -146,6 +146,9 @@ static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
{
int pnodeid, is_uv1, is_uv2, is_uv3;
if (strncmp(oem_id, "SGI", 3) != 0)
return 0;
is_uv1 = !strcmp(oem_id, "SGI");
is_uv2 = !strcmp(oem_id, "SGI2");
is_uv3 = !strncmp(oem_id, "SGI3", 4); /* there are varieties of UV3 */