From: Cody P Schafer <jmesmon@xxxxxxxxx>
In 2 VM_BUG()s, avoid open coding zone ownership of pfns.
Signed-off-by: Cody P Schafer <cody@xxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 3911c1a..c5d70ce 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -242,9 +242,7 @@ static int page_outside_zone_boundaries(struct zone *zone, struct page *page)
do {
seq = zone_span_seqbegin(zone);
- if (pfn >= zone->zone_start_pfn + zone->spanned_pages)
- ret = 1;
- else if (pfn < zone->zone_start_pfn)
+ if (!zone_spans_pfn(zone, pfn))
ret = 1;
} while (zone_span_seqretry(zone, seq));
@@ -5639,8 +5637,7 @@ void set_pageblock_flags_group(struct page *page, unsigned long flags,
pfn = page_to_pfn(page);
bitmap = get_pageblock_bitmap(zone, pfn);
bitidx = pfn_to_bitidx(zone, pfn);
- VM_BUG_ON(pfn < zone->zone_start_pfn);
- VM_BUG_ON(pfn >= zone->zone_start_pfn + zone->spanned_pages);
+ VM_BUG_ON(!zone_spans_pfn(zone, pfn));
for (; start_bitidx <= end_bitidx; start_bitidx++, value <<= 1)
if (flags & value)
--
1.8.0.3
--
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