[PATCH] Fix potentially derefencing uninitialized 'r'.

[Geunsik Lim]

struct memblock_region 'r' will not be initialized potentially
because of while statement's condition in __next_mem_pfn_range()function.
Initialize struct memblock_region data structure by default.

Signed-off-by: Geunsik Lim <geunsik.lim@xxxxxxxxxxx>
---
 mm/memblock.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/mm/memblock.c b/mm/memblock.c
index 77b5f22..867f5a2 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -671,7 +671,7 @@ void __init_memblock __next_mem_pfn_range(int *idx, int nid,
 				unsigned long *out_end_pfn, int *out_nid)
 {
 	struct memblock_type *type = &memblock.memory;
-	struct memblock_region *r;
+	struct memblock_region *r = &type->regions[*idx];
 
 	while (++*idx < type->cnt) {
 		r = &type->regions[*idx];
-- 
1.7.8.1

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