[PATCH 1/3] X86, UV: Update UV APIC OEM check

[Mike Travis]

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@xxxxxxx>
Acked-by: Hedi Berriche <hedi@xxxxxxx>
Acked-by: Dimitri Sivanich <sivanich@xxxxxxx>
---
 arch/x86/kernel/apic/x2apic_uv_x.c |    3 +++
 1 file changed, 3 insertions(+)

--- linux.orig/arch/x86/kernel/apic/x2apic_uv_x.c
+++ linux/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -146,6 +146,9 @@ static int __init uv_acpi_madt_oem_check
 {
 	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 */

-- 
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