[PATCH] mm/sparse.c: fix build warning

[H Hartley Sweeten]

Fix warning due to uninitialized variable.

mm/sparse.c: In function '__section_nr':
mm/sparse.c:132: warning: 'root' is used uninitialized in this function

Signed-off-by: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>

---

diff --git a/mm/sparse.c b/mm/sparse.c
index 083f5b6..5657e92 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -117,7 +117,7 @@ static inline int sparse_index_init(unsigned long
section_nr, int nid)
 int __section_nr(struct mem_section* ms)
 {
 	unsigned long root_nr;
-	struct mem_section* root;
+	struct mem_section *uninitialized_var(root);
 
 	for (root_nr = 0; root_nr < NR_SECTION_ROOTS; root_nr++) {
 		root = __nr_to_section(root_nr * SECTIONS_PER_ROOT); 
--
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