sparsemem: Fix compilation on PowerPC

Stephen reported:
build (powerpc
ppc64_defconfig) produced these warnings:

mm/sparse.c: In function 'sparse_init':
mm/sparse.c:488: warning: unused variable 'map_count'
mm/sparse.c:484: warning: unused variable 'size2'
mm/sparse.c:481: warning: unused variable 'map_map'
mm/sparse.c: At top level:
mm/sparse.c:442: warning: 'sparse_early_mem_maps_alloc_node' defined but not used

Introduced by commit 9bdac914240759457175ac0d6529a37d2820bc4d
("sparsemem: Put mem map for one node together").

Conditionalize the bits appropriately based on the setting of
CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Tested-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <4B895682.1080706@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

1 files changed, 7 insertions, 4 deletions

diff --git a/mm/sparse.c b/mm/sparse.c
index 9b6b93a4d78d..22896d589133 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -439,6 +439,7 @@ void __init sparse_mem_maps_populate_node(struct page **map_map,
 }
 #endif /* !CONFIG_SPARSEMEM_VMEMMAP */
 
+#ifdef CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
 static void __init sparse_early_mem_maps_alloc_node(struct page **map_map,
                                  unsigned long pnum_begin,
                                  unsigned long pnum_end,
@@ -447,8 +448,7 @@ static void __init sparse_early_mem_maps_alloc_node(struct page **map_map,
         sparse_mem_maps_populate_node(map_map, pnum_begin, pnum_end,
                                          map_count, nodeid);
 }
-
-#ifndef CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
+#else
 static struct page __init *sparse_early_mem_map_alloc(unsigned long pnum)
 {
         struct page *map;
@@ -478,14 +478,17 @@ void __init sparse_init(void)
 {
         unsigned long pnum;
         struct page *map;
-        struct page **map_map;
         unsigned long *usemap;
         unsigned long **usemap_map;
-        int size, size2;
+        int size;
         int nodeid_begin = 0;
         unsigned long pnum_begin = 0;
         unsigned long usemap_count;
+#ifdef CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
         unsigned long map_count;
+        int size2;
+        struct page **map_map;
+#endif
 
         /*
          * map is using big page (aka 2M in x86 64 bit)