diff options
Diffstat (limited to 'mm/sparse.c')
| -rw-r--r-- | mm/sparse.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/mm/sparse.c b/mm/sparse.c index 044138852baf..60805abf98af 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -207,6 +207,16 @@ void __init memory_present(int nid, unsigned long start, unsigned long end) { unsigned long pfn; +#ifdef CONFIG_SPARSEMEM_EXTREME + if (unlikely(!mem_section)) { + unsigned long size, align; + + size = sizeof(struct mem_section) * NR_SECTION_ROOTS; + align = 1 << (INTERNODE_CACHE_SHIFT); + mem_section = memblock_virt_alloc(size, align); + } +#endif + start &= PAGE_SECTION_MASK; mminit_validate_memmodel_limits(&start, &end); for (pfn = start; pfn < end; pfn += PAGES_PER_SECTION) { |