sh: Make 29/32-bit mode check helper generally available.

Presently __in_29bit_mode() is only defined for the PMB case, but
it's also easily derived from the CONFIG_29BIT and CONFIG_32BIT &&
CONFIG_PMB=n cases.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

arch/sh/include/asm/addrspace.h

@@ -65,11 +65,5 @@
 #define P3_ADDR_MAX		P4SEG
 #endif
 
-#ifndef __ASSEMBLY__
-#ifdef CONFIG_PMB
-extern int __in_29bit_mode(void);
-#endif /* CONFIG_PMB */
-#endif /* __ASSEMBLY__ */
-
 #endif /* __KERNEL__ */
 #endif /* __ASM_SH_ADDRSPACE_H */

arch/sh/include/asm/mmu.h

@@ -31,6 +31,7 @@
 
 #ifndef __ASSEMBLY__
 #include <linux/errno.h>
+#include <linux/threads.h>
 
 /* Default "unsigned long" context */
 typedef unsigned long mm_context_id_t[NR_CPUS];
@@ -72,6 +73,7 @@ long pmb_remap(unsigned long virt, unsigned long phys,
 	       unsigned long size, unsigned long flags);
 void pmb_unmap(unsigned long addr);
 int pmb_init(void);
+bool __in_29bit_mode(void);
 #else
 static inline long pmb_remap(unsigned long virt, unsigned long phys,
 			     unsigned long size, unsigned long flags)
@@ -87,8 +89,14 @@ static inline int pmb_init(void)
 {
 	return -ENODEV;
 }
-#endif /* CONFIG_PMB */
 
+#ifdef CONFIG_29BIT
+#define __in_29bit_mode()	(1)
+#else
+#define __in_29bit_mode()	(0)
+#endif
+
+#endif /* CONFIG_PMB */
 #endif /* __ASSEMBLY__ */
 
 #endif /* __MMU_H */

arch/sh/mm/init.c

@@ -338,10 +338,3 @@ EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
 #endif
 
 #endif /* CONFIG_MEMORY_HOTPLUG */
-
-#ifdef CONFIG_PMB
-int __in_29bit_mode(void)
-{
-	return !(ctrl_inl(PMB_PASCR) & PASCR_SE);
-}
-#endif /* CONFIG_PMB */

arch/sh/mm/pmb.c

@@ -436,6 +436,11 @@ int __uses_jump_to_uncached pmb_init(void)
 	return 0;
 }
 
+bool __in_29bit_mode(void)
+{
+        return (__raw_readl(PMB_PASCR) & PASCR_SE) == 0;
+}
+
 static int pmb_seq_show(struct seq_file *file, void *iter)
 {
 	int i;