diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/bootmem.c | 31 |
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 |