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Subject[RFC PATCH v2 05/25] mm/memory_hotplug: use {pgdat,zone}_is_empty() when resizing zones & pgdats
Date
Use the *_is_empty() helpers to be more clear about what we're actually
checking for.

Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
---
mm/memory_hotplug.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index df04c36..deea8c2 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -242,7 +242,7 @@ static void grow_zone_span(struct zone *zone, unsigned long start_pfn,
zone_span_writelock(zone);

old_zone_end_pfn = zone->zone_start_pfn + zone->spanned_pages;
- if (!zone->spanned_pages || start_pfn < zone->zone_start_pfn)
+ if (zone_is_empty(zone) || start_pfn < zone->zone_start_pfn)
zone->zone_start_pfn = start_pfn;

zone->spanned_pages = max(old_zone_end_pfn, end_pfn) -
@@ -383,7 +383,7 @@ static void grow_pgdat_span(struct pglist_data *pgdat, unsigned long start_pfn,
unsigned long old_pgdat_end_pfn =
pgdat->node_start_pfn + pgdat->node_spanned_pages;

- if (!pgdat->node_spanned_pages || start_pfn < pgdat->node_start_pfn)
+ if (pgdat_is_empty(pgdat) || start_pfn < pgdat->node_start_pfn)
pgdat->node_start_pfn = start_pfn;

pgdat->node_spanned_pages = max(old_pgdat_end_pfn, end_pfn) -
--
1.8.2.1


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