mm: remove unneeded kallsyms include

[sfrench/cifs-2.6.git] / mm / sparse.c

diff --git a/mm/sparse.c b/mm/sparse.c
index 2609aba121e89cc5c8b656f4ef3539545c434091..6b8b5e91ceefb1cf9e1c62aa73feaffe458e3a0f 100644 (file)
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -264,7 +264,11 @@ unsigned long __init node_memmap_size_bytes(int nid, unsigned long start_pfn,
  */
 static unsigned long sparse_encode_mem_map(struct page *mem_map, unsigned long pnum)
 {
-       return (unsigned long)(mem_map - (section_nr_to_pfn(pnum)));
+       unsigned long coded_mem_map =
+               (unsigned long)(mem_map - (section_nr_to_pfn(pnum)));
+       BUILD_BUG_ON(SECTION_MAP_LAST_BIT > (1UL<<PFN_SECTION_SHIFT));
+       BUG_ON(coded_mem_map & ~SECTION_MAP_MASK);
+       return coded_mem_map;
 }
 
 /*