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Diffstat (limited to 'mm/bootmem.c')
-rw-r--r--mm/bootmem.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/mm/bootmem.c b/mm/bootmem.c
index 369624d2789c..e8fb927392b9 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -545,6 +545,37 @@ void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
return __alloc_bootmem(size, align, goal);
}
+#ifdef CONFIG_SPARSEMEM
+void * __init alloc_bootmem_section(unsigned long size,
+ unsigned long section_nr)
+{
+ void *ptr;
+ unsigned long limit, goal, start_nr, end_nr, pfn;
+ struct pglist_data *pgdat;
+
+ pfn = section_nr_to_pfn(section_nr);
+ goal = PFN_PHYS(pfn);
+ limit = PFN_PHYS(section_nr_to_pfn(section_nr + 1)) - 1;
+ pgdat = NODE_DATA(early_pfn_to_nid(pfn));
+ ptr = __alloc_bootmem_core(pgdat->bdata, size, SMP_CACHE_BYTES, goal,
+ limit);
+
+ if (!ptr)
+ return NULL;
+
+ start_nr = pfn_to_section_nr(PFN_DOWN(__pa(ptr)));
+ end_nr = pfn_to_section_nr(PFN_DOWN(__pa(ptr) + size));
+ if (start_nr != section_nr || end_nr != section_nr) {
+ printk(KERN_WARNING "alloc_bootmem failed on section %ld.\n",
+ section_nr);
+ free_bootmem_core(pgdat->bdata, __pa(ptr), size);
+ ptr = NULL;
+ }
+
+ return ptr;
+}
+#endif
+
#ifndef ARCH_LOW_ADDRESS_LIMIT
#define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
#endif