From patchwork Fri Oct 5 02:31:07 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [4/10] memory-hotplug : unregister memory section on SPARSEMEM_VMEMMAP From: Yasuaki Ishimatsu X-Patchwork-Id: 189395 Message-Id: <506E466B.4050903@jp.fujitsu.com> To: , , , , , , , , , Cc: Yasuaki Ishimatsu , , , , , , , , Date: Fri, 5 Oct 2012 11:31:07 +0900 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 CC: Jiang Liu CC: Len Brown CC: Christoph Lameter Cc: Minchan Kim CC: Andrew Morton CC: KOSAKI Motohiro CC: Wen Congyang Signed-off-by: Yasuaki Ishimatsu --- mm/memory_hotplug.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Index: linux-3.6/mm/memory_hotplug.c =================================================================== --- linux-3.6.orig/mm/memory_hotplug.c 2012-10-04 18:29:50.577668254 +0900 +++ linux-3.6/mm/memory_hotplug.c 2012-10-04 18:29:58.284676075 +0900 @@ -279,11 +279,14 @@ static int __meminit __add_section(int n #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)