diff options
Diffstat (limited to 'mm/sparse.c')
| -rw-r--r-- | mm/sparse.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/mm/sparse.c b/mm/sparse.c index 7a5dacaa06e3..6b8b5e91ceef 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -211,7 +211,7 @@ void __init memory_present(int nid, unsigned long start, unsigned long end) if (unlikely(!mem_section)) { unsigned long size, align; - size = sizeof(struct mem_section) * NR_SECTION_ROOTS; + size = sizeof(struct mem_section*) * NR_SECTION_ROOTS; align = 1 << (INTERNODE_CACHE_SHIFT); mem_section = memblock_virt_alloc(size, align); } @@ -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; } /* |