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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2008-05-14 16:05:40 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-05-14 19:11:14 -0700 |
| commit | c3723ca3874a8fc2218c4726d57e3a7da9e83e47 (patch) | |
| tree | d7aa49e6ce3d10bcab1a79e3045425dad6906c40 | |
| parent | 3b7ec117bf6c98f5a845311c4ca5ca020a3d7689 (diff) | |
| download | linux-stable-c3723ca3874a8fc2218c4726d57e3a7da9e83e47.tar.gz linux-stable-c3723ca3874a8fc2218c4726d57e3a7da9e83e47.tar.bz2 linux-stable-c3723ca3874a8fc2218c4726d57e3a7da9e83e47.zip | |
memory hotplug: memmap_init_zone called twice
__add_zone calls memmap_init_zone twice if memory gets attached to an empty
zone. Once via init_currently_empty_zone and once explictly right after that
call.
Looks like this is currently not a bug, however the call is superfluous and
might lead to subtle bugs if memmap_init_zone gets changed. So make sure it
is called only once.
Cc: Yasunori Goto <y-goto@jp.fujitsu.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/memory_hotplug.c | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index b17dca7249f8..988bd91b9f7f 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -167,13 +167,9 @@ static int __add_zone(struct zone *zone, unsigned long phys_start_pfn) int zone_type; zone_type = zone - pgdat->node_zones; - if (!zone->wait_table) { - int ret = 0; - ret = init_currently_empty_zone(zone, phys_start_pfn, - nr_pages, MEMMAP_HOTPLUG); - if (ret < 0) - return ret; - } + if (!zone->wait_table) + return init_currently_empty_zone(zone, phys_start_pfn, + nr_pages, MEMMAP_HOTPLUG); memmap_init_zone(nr_pages, nid, zone_type, phys_start_pfn, MEMMAP_HOTPLUG); return 0; |