[POWERPC] Move declaration of init_bootmem_done into system.h

... instead of having an extern declaration in a .c file.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/mm/init_32.c

@@ -43,6 +43,7 @@
 #include <asm/btext.h>
 #include <asm/tlb.h>
 #include <asm/sections.h>
+#include <asm/system.h>
 
 #include "mmu_decl.h"
 
@@ -76,8 +77,6 @@ void MMU_init(void);
 /* XXX should be in current.h  -- paulus */
 extern struct task_struct *current_set[NR_CPUS];
 
-extern int init_bootmem_done;
-
 /*
  * this tells the system to map all of ram with the segregs
  * (i.e. page tables) instead of the bats.

include/asm-powerpc/system.h

@@ -190,6 +190,7 @@ extern struct task_struct *_switch(struct thread_struct *prev,
 
 extern unsigned int rtas_data;
 extern int mem_init_done;	/* set on boot once kmalloc can be called */
+extern int init_bootmem_done;	/* set on !NUMA once bootmem is available */
 extern unsigned long memory_limit;
 extern unsigned long klimit;