microblaze: export some symbols

Some device drivers require the symbols _ebss, kernel_thread,
__page_offset or ___range_ok, so export them.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Michal Simek <monstr@monstr.eu>

arch/microblaze/kernel/microblaze_ksyms.c

@@ -45,3 +45,5 @@ extern void __udivsi3(void);
 EXPORT_SYMBOL(__udivsi3);
 extern void __umodsi3(void);
 EXPORT_SYMBOL(__umodsi3);
+extern char *_ebss;
+EXPORT_SYMBOL_GPL(_ebss);

arch/microblaze/kernel/process.c

@@ -173,6 +173,7 @@ int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
 	return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0,
 			&regs, 0, NULL, NULL);
 }
+EXPORT_SYMBOL_GPL(kernel_thread);
 
 unsigned long get_wchan(struct task_struct *p)
 {

arch/microblaze/mm/init.c

@@ -24,7 +24,7 @@
 #include <asm/tlb.h>
 
 unsigned int __page_offset;
-/* EXPORT_SYMBOL(__page_offset); */
+EXPORT_SYMBOL(__page_offset);
 
 char *klimit = _end;
 
@@ -199,3 +199,4 @@ int ___range_ok(unsigned long addr, unsigned long size)
 	return ((addr < memory_start) ||
 		((addr + size) > memory_end));
 }
+EXPORT_SYMBOL(___range_ok);