--- zzzz-none-000/linux-2.6.39.4/arch/x86/kernel/cpu/common.c	2011-08-03 19:43:28.000000000 +0000
+++ puma6-arm-6490-729/linux-2.6.39.4/arch/x86/kernel/cpu/common.c	2021-11-10 13:23:10.000000000 +0000
@@ -565,7 +565,8 @@
 
 		cpuid_count(0x00000007, 0, &eax, &ebx, &ecx, &edx);
 
-		c->x86_capability[9] = ebx;
+		if (eax > 0)
+			c->x86_capability[9] = ebx;
 	}
 
 	/* AMD-defined flags: level 0x80000001 */