diff options
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 7ea9a003ad5..a7381be2132 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -203,7 +203,10 @@ static unsigned long __meminitdata dma_reserve; #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP /* Movable memory ranges, will also be used by memblock subsystem. */ -struct movablemem_map movablemem_map; +struct movablemem_map movablemem_map = { + .acpi = false, + .nr_map = 0, +}; static unsigned long __meminitdata arch_zone_lowest_possible_pfn[MAX_NR_ZONES]; static unsigned long __meminitdata arch_zone_highest_possible_pfn[MAX_NR_ZONES]; @@ -5314,6 +5317,23 @@ static int __init cmdline_parse_movablemem_map(char *p) if (!p) goto err; + if (!strcmp(p, "acpi")) + movablemem_map.acpi = true; + + /* + * If user decide to use info from BIOS, all the other user specified + * ranges will be ingored. + */ + if (movablemem_map.acpi) { + if (movablemem_map.nr_map) { + memset(movablemem_map.map, 0, + sizeof(struct movablemem_entry) + * movablemem_map.nr_map); + movablemem_map.nr_map = 0; + } + return 0; + } + oldp = p; mem_size = memparse(p, &p); if (p == oldp) |