m68k: Allow no CPU/platform type for allnoconfig

Allow no CPU/platform type for allnoconfig
  - Provide a dummy value for FPSTATESIZE if no CPU type was selected
  - Provide a dummy value for NR_IRQS if no platform type was selected
  - Warn the user if no CPU or platform type was selected

Note: you still cannot build an allnoconfig kernel, as CONFIG_SWAP=n doesn't
build and we cannot easily fix that
(http://groups.google.com/group/linux.kernel/browse_thread/thread/d430c78b07e1827b)

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/m68k/kernel/setup.c b/arch/m68k/kernel/setup.c
index a9fb83a8c180..b1f39e4cedbc 100644
--- a/arch/m68k/kernel/setup.c
+++ b/arch/m68k/kernel/setup.c
@@ -26,6 +26,7 @@
 
 #include <asm/bootinfo.h>
 #include <asm/setup.h>
+#include <asm/fpu.h>
 #include <asm/irq.h>
 #include <asm/io.h>
 #include <asm/machdep.h>
@@ -40,6 +41,11 @@
 #include <asm/dvma.h>
 #endif
 
+#if !FPSTATESIZE || !NR_IRQS
+#warning No CPU/platform type selected, your kernel will not work!
+#warning Are you building an allnoconfig kernel?
+#endif
+
 unsigned long m68k_machtype;
 EXPORT_SYMBOL(m68k_machtype);
 unsigned long m68k_cputype;