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mm: use zone_is_empty() instead of if(zone->spanned_pages)

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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>
This commit is contained in:
Xishi Qiu 2013-09-11 14:21:45 -07:00 committed by Linus Torvalds
parent c33bc315fd
commit 8080fc038e
2 changed files with 4 additions and 4 deletions
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6
mm/memory_hotplug.c
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@ -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;

2
mm/page_alloc.c
View File

@ -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);