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memory-hotplug: fix comments in zone_spanned_pages_in_node() and zone_spanned_pages_in_node() 

When hot adding a node from add_memory(), we will add memblock first, so
the node is not empty.  But when called from cpu_up(), the node should
be empty.

Signed-off-by: Xishi Qiu <qiuxishi@huawei.com>
Cc: Tang Chen <tangchen@cn.fujitsu.com>
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Taku Izumi <izumi.taku@jp.fujitsu.com>\
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
hifive-unleashed-5.1
Xishi Qiu 2015-09-08 15:04:16 -07:00 committed by Linus Torvalds
parent 34b100605c
commit b5685e9263
1 changed files with 2 additions and 2 deletions
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4
mm/page_alloc.c
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@ -5085,7 +5085,7 @@ static unsigned long __meminit zone_spanned_pages_in_node(int nid,
{
unsigned long zone_start_pfn, zone_end_pfn;
/* When hotadd a new node, the node should be empty */
/* When hotadd a new node from cpu_up(), the node should be empty */
if (!node_start_pfn && !node_end_pfn)
return 0;
@ -5152,7 +5152,7 @@ static unsigned long __meminit zone_absent_pages_in_node(int nid,
unsigned long zone_high = arch_zone_highest_possible_pfn[zone_type];
unsigned long zone_start_pfn, zone_end_pfn;
/* When hotadd a new node, the node should be empty */
/* When hotadd a new node from cpu_up(), the node should be empty */
if (!node_start_pfn && !node_end_pfn)
return 0;