powerpc: Fix bug arising from having multiple memory_limit variables

We had a static memory_limit in prom.c, and then another one defined
in setup_64.c and used in numa.c, which resulted in the kernel crashing
when mem=xxx was given on the command line.  This puts the declaration
in system.h and the definition in mem.c.  This also moves the
definition of tce_alloc_start/end out of setup_64.c.

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

1 files changed, 2 insertions, 1 deletions

diff --git a/arch/ppc64/kernel/prom.c b/arch/ppc64/kernel/prom.c
index cd41a47dd43f..97bfceb5353b 100644
--- a/arch/ppc64/kernel/prom.c
+++ b/arch/ppc64/kernel/prom.c
@@ -83,6 +83,8 @@ static int __initdata dt_root_addr_cells;
 static int __initdata dt_root_size_cells;
 static int __initdata iommu_is_off;
 int __initdata iommu_force_on;
+unsigned long tce_alloc_start, tce_alloc_end;
+
 typedef u32 cell_t;
 
 #if 0
@@ -1063,7 +1065,6 @@ static int __init early_init_dt_scan_chosen(unsigned long node,
 {
         u32 *prop;
         u64 *prop64;
-        extern unsigned long tce_alloc_start, tce_alloc_end;
 
         DBG("search \"chosen\", depth: %d, uname: %s\n", depth, uname);