[PATCH] Increase bus/apic limits on x86-64

This patch increases some hardcoded limits people have already run into or
plan to go towards eventually.

Increase max MP busses on x86-64.  Needed for some machines.  Suggested by
Andrew Chen and James Cleverdon.

MAX_IRQ_SOURCES kept at 256 for now, matching i386.

Increase MAX_IO_APICS to 32 following i386.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/asm-x86_64/apicdef.h

@@ -108,7 +108,7 @@
 
 #define APIC_BASE (fix_to_virt(FIX_APIC_BASE))
 
-#define MAX_IO_APICS 16
+#define MAX_IO_APICS 32
 
 /*
  * the local APIC register structure, memory mapped. Not terribly well

include/asm-x86_64/mpspec.h

@@ -156,8 +156,8 @@ struct mpc_config_lintsrc
  *	7	2 CPU MCA+PCI
  */
 
+#define MAX_MP_BUSSES 270
 #define MAX_IRQ_SOURCES 256
-#define MAX_MP_BUSSES 32
 enum mp_bustype {
 	MP_BUS_ISA = 1,
 	MP_BUS_EISA,