diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memory_hotplug.c | 31 |
1 files changed, 9 insertions, 22 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 4344e85213f2..0a54ffac8c68 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -1172,14 +1172,13 @@ bool is_mem_section_removable(unsigned long start_pfn, unsigned long nr_pages) } /* - * Confirm all pages in a range [start, end) belong to the same zone. - * When true, return its valid [start, end). + * Confirm all pages in a range [start, end) belong to the same zone (skipping + * memory holes). When true, return the zone. */ -int test_pages_in_a_zone(unsigned long start_pfn, unsigned long end_pfn, - unsigned long *valid_start, unsigned long *valid_end) +struct zone *test_pages_in_a_zone(unsigned long start_pfn, + unsigned long end_pfn) { unsigned long pfn, sec_end_pfn; - unsigned long start, end; struct zone *zone = NULL; struct page *page; int i; @@ -1200,24 +1199,15 @@ int test_pages_in_a_zone(unsigned long start_pfn, unsigned long end_pfn, continue; /* Check if we got outside of the zone */ if (zone && !zone_spans_pfn(zone, pfn + i)) - return 0; + return NULL; page = pfn_to_page(pfn + i); if (zone && page_zone(page) != zone) - return 0; - if (!zone) - start = pfn + i; + return NULL; zone = page_zone(page); - end = pfn + MAX_ORDER_NR_PAGES; } } - if (zone) { - *valid_start = start; - *valid_end = min(end, end_pfn); - return 1; - } else { - return 0; - } + return zone; } /* @@ -1462,7 +1452,6 @@ static int __ref __offline_pages(unsigned long start_pfn, unsigned long offlined_pages = 0; int ret, node, nr_isolate_pageblock; unsigned long flags; - unsigned long valid_start, valid_end; struct zone *zone; struct memory_notify arg; char *reason; @@ -1487,14 +1476,12 @@ static int __ref __offline_pages(unsigned long start_pfn, /* This makes hotplug much easier...and readable. we assume this for now. .*/ - if (!test_pages_in_a_zone(start_pfn, end_pfn, &valid_start, - &valid_end)) { + zone = test_pages_in_a_zone(start_pfn, end_pfn); + if (!zone) { ret = -EINVAL; reason = "multizone range"; goto failed_removal; } - - zone = page_zone(pfn_to_page(valid_start)); node = zone_to_nid(zone); /* set above range as isolated */ |