On 11/27/2012 06:00 PM, Wen Congyang wrote:
From: Yasuaki Ishimatsu<isimatu.yasu...@jp.fujitsu.com>
Currently __remove_section for SPARSEMEM_VMEMMAP does nothing. But even if
we use SPARSEMEM_VMEMMAP, we can unregister the memory_section.
So the patch add unregister_memory_section() into __remove_section().
CC: David Rientjes<rient...@google.com>
CC: Jiang Liu<liu...@gmail.com>
CC: Len Brown<len.br...@intel.com>
CC: Christoph Lameter<c...@linux.com>
Cc: Minchan Kim<minchan....@gmail.com>
CC: Andrew Morton<a...@linux-foundation.org>
CC: KOSAKI Motohiro<kosaki.motoh...@jp.fujitsu.com>
Signed-off-by: Yasuaki Ishimatsu<isimatu.yasu...@jp.fujitsu.com>
Signed-off-by: Wen Congyang<we...@cn.fujitsu.com>
__remove_section() of CONFIG_SPARSEMEM_VMEMMAP will be integrated
into one in [PATCH 08/12], so I think we can merge this patch into
[PATCH 08/12].
Reviewed-by: Tang Chen <tangc...@cn.fujitsu.com>
---
mm/memory_hotplug.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index e741732..171610d 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -279,11 +279,14 @@ static int __meminit __add_section(int nid, struct zone
*zone,
#ifdef CONFIG_SPARSEMEM_VMEMMAP
static int __remove_section(struct zone *zone, struct mem_section *ms)
{
- /*
- * XXX: Freeing memmap with vmemmap is not implement yet.
- * This should be removed later.
- */
- return -EBUSY;
+ int ret = -EINVAL;
+
+ if (!valid_section(ms))
+ return ret;
+
+ ret = unregister_memory_section(ms);
+
+ return ret;
}
#else
static int __remove_section(struct zone *zone, struct mem_section *ms)
--
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