diff -u linux/arch/x86_64/mm/fault.c-ERRATA93 linux/arch/x86_64/mm/fault.c
--- linux/arch/x86_64/mm/fault.c-ERRATA93	2004-01-08 16:56:58.000000000 +0100
+++ linux/arch/x86_64/mm/fault.c	2004-01-13 16:08:27.000000000 +0100
@@ -173,6 +173,40 @@
 	return prefetch;
 }
 
+static const char errata93_warning[] = 
+KERN_ERR "******* Your BIOS seems to not contain a fix for K8 errata #93\n"
+KERN_ERR "******* Working around it, but it may cause SEGVs or burn power.\n"
+KERN_ERR "******* Please consider a BIOS update.\n"
+KERN_ERR "******* Disabling USB legacy in the BIOS may also help.\n";
+
+/* Workaround for K8 erratum #93 & buggy BIOS.
+   BIOS SMM functions are required to use a specific workaround
+   to avoid corruption of the 64bit RIP register on C stepping K8. 
+   A lot of BIOS that didn't get tested properly miss this. 
+   The OS sees this as a page fault with the upper 32bits of RIP cleared.
+   Try to work around it here.
+   Note we only handle faults in kernel here. */
+
+static int is_errata93(struct pt_regs *regs, unsigned long address) 
+{ 
+	static int warned;
+	if (address != regs->rip)
+		return 0;
+	if ((address >> 32) != 0) 
+		return 0;
+	address |= 0xffffffffUL << 32;
+	if ((address >= _stext && address <= _etext) || 
+	    (address >= MODULES_VADDR && address <= MODULES_END)) { 
+		if (!warned) {
+			printk(errata93_warning); 		
+			warned = 1;
+		}
+		regs->rip = address;
+		return 1;
+	}
+	return 0;
+} 
+
 int page_fault_trace; 
 int exception_trace = 1;
 
@@ -350,9 +384,16 @@
 		return;
 	}
 
+	/* 
+	 * Hall of shame of CPU/BIOS bugs.
+	 */
+
 	if (is_prefetch(regs, address))
 		return;
 
+	if (is_errata93(regs, address))
+		return;
+
 /*
  * Oops. The kernel tried to access some bad page. We'll have to
  * terminate things with extreme prejudice.