[PATCH] PnP BIOS exception fixes

[Brian Gerst]

This patch fixes two errors in fixup_exception() for PnP BIOS faults:
- Check for the correct segments used for the BIOS
- Fix asm constraints so that EIP and ESP are properly reloaded

--
				Brian Gerst
diff -urN linux-bk/arch/i386/mm/extable.c linux/arch/i386/mm/extable.c
--- linux-bk/arch/i386/mm/extable.c	2004-02-15 00:41:41.000000000 -0500
+++ linux/arch/i386/mm/extable.c	2004-03-04 10:45:32.988904488 -0500
@@ -12,7 +12,7 @@
 	const struct exception_table_entry *fixup;
 
 #ifdef CONFIG_PNPBIOS
-	if (unlikely((regs->xcs | 8) == 0x88)) /* 0x80 or 0x88 */
+	if (unlikely((regs->xcs & ~15) == (GDT_ENTRY_PNPBIOS_BASE << 3)))
 	{
 		extern u32 pnp_bios_fault_eip, pnp_bios_fault_esp;
 		extern u32 pnp_bios_is_utter_crap;
@@ -21,7 +21,7 @@
 		__asm__ volatile(
 			"movl %0, %%esp\n\t"
 			"jmp *%1\n\t"
-			: "=a" (pnp_bios_fault_esp), "=b" (pnp_bios_fault_eip));
+			: : "g" (pnp_bios_fault_esp), "g" (pnp_bios_fault_eip));
 		panic("do_trap: can't hit this");
 	}
 #endif