m68k: only generate FPU instructions if CONFIG_FPU enabled

Most of the m68k code that supports a hardware FPU is surrounded by
CONFIG_FPU. Be consistent and surround the hardware FPU instruction
setup in setup_mm.c with CONFIG_FPU as well as the check for
CONFIG_M68KFPU_EMU_ONLY.

The existing classic m68k architectures all define CONFIG_FPU, so they
see no change from this. But on ColdFire where we do not support the
emulated FP code we can now compile without CONFIG_FPU being set as well.

Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>

diff --git a/arch/m68k/kernel/setup_mm.c b/arch/m68k/kernel/setup_mm.c
index 13f4640..adbb806 100644 (file)
--- a/arch/m68k/kernel/setup_mm.c
+++ b/arch/m68k/kernel/setup_mm.c
@@ -245,7 +245,7 @@ void __init setup_arch(char **cmdline_p)
         * We should really do our own FPU check at startup.
         * [what do we do with buggy 68LC040s? if we have problems
         *  with them, we should add a test to check_bugs() below] */
-#ifndef CONFIG_M68KFPU_EMU_ONLY
+#if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU_ONLY)
        /* clear the fpu if we have one */
        if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|FPU_COLDFIRE)) {
                volatile int zero = 0;