powerpc: Move some extern declarations from C code into headers

This also make klimit have the same type on 32-bit as on 64-bit,
namely unsigned long, and defines and initializes it in one place.

Signed-off-by: Paul Mackerras <paulus@samba.org>

9 files changed, 6 insertions, 21 deletions

diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 1bf3642cb859..6391a4a0709a 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -71,10 +71,6 @@ struct isa_reg_property {
 typedef int interpret_func(struct device_node *, unsigned long *,
                            int, int, int);
 
-extern struct rtas_t rtas;
-extern struct lmb lmb;
-extern unsigned long klimit;
-
 static int __initdata dt_root_addr_cells;
 static int __initdata dt_root_size_cells;
 
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 06e4ef215627..bae4bff138f1 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -69,6 +69,8 @@ int _machine = 0;
 EXPORT_SYMBOL(_machine);
 #endif
 
+unsigned long klimit = (unsigned long) _end;
+
 /*
  * This still seems to be needed... -- paulus
  */ 
diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index f73d7681b2e9..c98cfcc9cd9a 100644
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -279,7 +279,6 @@ arch_initcall(ppc_init);
 /* Warning, IO base is not yet inited */
 void __init setup_arch(char **cmdline_p)
 {
-        extern char *klimit;
         extern void do_init_bootmem(void);
 
         /* so udelay does something sensible, assume <= 1000 bogomips */
@@ -338,7 +337,7 @@ void __init setup_arch(char **cmdline_p)
         init_mm.start_code = PAGE_OFFSET;
         init_mm.end_code = (unsigned long) _etext;
         init_mm.end_data = (unsigned long) _edata;
-        init_mm.brk = (unsigned long) klimit;
+        init_mm.brk = klimit;
 
         /* Save unparsed command line copy for /proc/cmdline */
         strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index be607b877a55..6791668213e7 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -96,14 +96,6 @@ extern void udbg_init_maple_realmode(void);
         do { udbg_putc = call_rtas_display_status_delay; } while(0)
 #endif
 
-/* extern void *stab; */
-extern unsigned long klimit;
-
-extern void mm_init_ppc64(void);
-extern void early_init_devtree(void *flat_dt);
-extern void unflatten_device_tree(void);
-extern void check_for_initrd(void);
-
 int have_of = 1;
 int boot_cpuid = 0;
 int boot_cpuid_phys = 0;
diff --git a/arch/powerpc/mm/init_32.c b/arch/powerpc/mm/init_32.c
index 4612a79dfb6e..7d4b8b5f0606 100644
--- a/arch/powerpc/mm/init_32.c
+++ b/arch/powerpc/mm/init_32.c
@@ -84,9 +84,6 @@ void MMU_init(void);
 /* XXX should be in current.h  -- paulus */
 extern struct task_struct *current_set[NR_CPUS];
 
-char *klimit = _end;
-struct device_node *memory_node;
-
 extern int init_bootmem_done;
 
 /*
diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c
index e274cf10205c..1134f70f231d 100644
--- a/arch/powerpc/mm/init_64.c
+++ b/arch/powerpc/mm/init_64.c
@@ -80,8 +80,6 @@
 #warning TASK_SIZE is smaller than it needs to be.
 #endif
 
-unsigned long klimit = (unsigned long)_end;
-
 /* max amount of RAM to use */
 unsigned long __max_memory;
 
diff --git a/arch/powerpc/platforms/iseries/setup.c b/arch/powerpc/platforms/iseries/setup.c
index 623c39aa0436..1f338341d8f2 100644
--- a/arch/powerpc/platforms/iseries/setup.c
+++ b/arch/powerpc/platforms/iseries/setup.c
@@ -40,7 +40,7 @@
 #include <asm/iommu.h>
 #include <asm/firmware.h>
 #include <asm/systemcfg.h>
-
+#include <asm/system.h>
 #include <asm/time.h>
 #include <asm/paca.h>
 #include <asm/cache.h>
@@ -85,7 +85,6 @@ static void iSeries_pci_final_fixup(void) { }
 int piranha_simulator;
 
 extern int rd_size;             /* Defined in drivers/block/rd.c */
-extern unsigned long klimit;
 extern unsigned long embedded_sysmap_start;
 extern unsigned long embedded_sysmap_end;
 
diff --git a/include/asm-powerpc/system.h b/include/asm-powerpc/system.h
index f0cce5a30235..5341b75c75cb 100644
--- a/include/asm-powerpc/system.h
+++ b/include/asm-powerpc/system.h
@@ -179,6 +179,7 @@ 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 unsigned long memory_limit;
+extern unsigned long klimit;
 
 extern int powersave_nap;       /* set if nap mode can be used in idle loop */
 
diff --git a/include/asm-ppc64/mmu.h b/include/asm-ppc64/mmu.h
index c43d512d5902..1a7e0afa2dc6 100644
--- a/include/asm-ppc64/mmu.h
+++ b/include/asm-ppc64/mmu.h
@@ -229,6 +229,7 @@ extern void htab_initialize_secondary(void);
 extern void hpte_init_native(void);
 extern void hpte_init_lpar(void);
 extern void hpte_init_iSeries(void);
+extern void mm_init_ppc64(void);
 
 extern long pSeries_lpar_hpte_insert(unsigned long hpte_group,
                                      unsigned long va, unsigned long prpn,