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Subject[patch 05/29] m68k: Allow no CPU/platform type for allnoconfig
From: Geert Uytterhoeven <geert@linux-m68k.org>

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>
---
arch/m68k/kernel/setup.c | 6 ++++++
include/asm-m68k/fpu.h | 10 +++++-----
include/asm-m68k/irq.h | 2 +-
include/asm-m68k/tlbflush.h | 8 ++++----
4 files changed, 16 insertions(+), 10 deletions(-)
--- 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;
--- a/include/asm-m68k/fpu.h
+++ b/include/asm-m68k/fpu.h
@@ -7,15 +7,15 @@
*/

#if defined(CONFIG_M68020) || defined(CONFIG_M68030)
-#define FPSTATESIZE (216/sizeof(unsigned char))
+#define FPSTATESIZE (216)
#elif defined(CONFIG_M68040)
-#define FPSTATESIZE (96/sizeof(unsigned char))
+#define FPSTATESIZE (96)
#elif defined(CONFIG_M68KFPU_EMU)
-#define FPSTATESIZE (28/sizeof(unsigned char))
+#define FPSTATESIZE (28)
#elif defined(CONFIG_M68060)
-#define FPSTATESIZE (12/sizeof(unsigned char))
+#define FPSTATESIZE (12)
#else
-#define FPSTATESIZE error no_cpu_type_configured
+#define FPSTATESIZE (0)
#endif

#endif /* __M68K_FPU_H */
--- a/include/asm-m68k/irq.h
+++ b/include/asm-m68k/irq.h
@@ -24,7 +24,7 @@
#elif defined(CONFIG_HP300)
#define NR_IRQS 8
#else
-#error unknown nr of irqs
+#define NR_IRQS 0
#endif

/*
--- a/include/asm-m68k/tlbflush.h
+++ b/include/asm-m68k/tlbflush.h
@@ -16,7 +16,7 @@ static inline void flush_tlb_kernel_page
".chip 68k"
: : "a" (addr));
set_fs(old_fs);
- } else
+ } else if (CPU_IS_020_OR_030)
__asm__ __volatile__("pflush #4,#4,(%0)" : : "a" (addr));
}

@@ -29,7 +29,7 @@ static inline void __flush_tlb(void)
__asm__ __volatile__(".chip 68040\n\t"
"pflushan\n\t"
".chip 68k");
- else
+ else if (CPU_IS_020_OR_030)
__asm__ __volatile__("pflush #0,#4");
}

@@ -45,7 +45,7 @@ static inline void __flush_tlb_one(unsig
{
if (CPU_IS_040_OR_060)
__flush_tlb040_one(addr);
- else
+ else if (CPU_IS_020_OR_030)
__asm__ __volatile__("pflush #0,#4,(%0)" : : "a" (addr));
}

@@ -60,7 +60,7 @@ static inline void flush_tlb_all(void)
__asm__ __volatile__(".chip 68040\n\t"
"pflusha\n\t"
".chip 68k");
- else
+ else if (CPU_IS_020_OR_030)
__asm__ __volatile__("pflusha");
}

--
Gr{oetje,eeting}s,
Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds



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