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authorXishi Qiu <qiuxishi@huawei.com>2013-09-11 14:21:45 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-09-11 15:57:38 -0700
commit8080fc038e91265e1002df7cae805fc17bb772fc (patch)
tree1a42d8550e638b436a7f96ed333f0a4da6e5afcf /mm
parentc33bc315fd921b1179a1d3df5756e0da6fb73944 (diff)
mm: use zone_is_empty() instead of if(zone->spanned_pages)
Use "zone_is_empty()" instead of "if (zone->spanned_pages)". Simplify the code, no functional change. Signed-off-by: Xishi Qiu <qiuxishi@huawei.com> Cc: Cody P Schafer <cody@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/memory_hotplug.c6
-rw-r--r--mm/page_alloc.c2
2 files changed, 4 insertions, 4 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 9eadad626d64..4f5df61d6016 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -230,7 +230,7 @@ static void grow_zone_span(struct zone *zone, unsigned long start_pfn,
zone_span_writelock(zone);
old_zone_end_pfn = zone_end_pfn(zone);
- 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) -
@@ -305,7 +305,7 @@ static int __meminit move_pfn_range_left(struct zone *z1, struct zone *z2,
goto out_fail;
/* use start_pfn for z1's start_pfn if z1 is empty */
- if (z1->spanned_pages)
+ if (!zone_is_empty(z1))
z1_start_pfn = z1->zone_start_pfn;
else
z1_start_pfn = start_pfn;
@@ -347,7 +347,7 @@ static int __meminit move_pfn_range_right(struct zone *z1, struct zone *z2,
goto out_fail;
/* use end_pfn for z2's end_pfn if z2 is empty */
- if (z2->spanned_pages)
+ if (!zone_is_empty(z2))
z2_end_pfn = zone_end_pfn(z2);
else
z2_end_pfn = end_pfn;
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index f885eb827159..7c3f8d7e2d8e 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1306,7 +1306,7 @@ void mark_free_pages(struct zone *zone)
int order, t;
struct list_head *curr;
- if (!zone->spanned_pages)
+ if (zone_is_empty(zone))
return;
spin_lock_irqsave(&zone->lock, flags);