+ mm-hotplug-only-free-wait_table-if-its-allocated-by-vmalloc.patch added to -mm tree

+ mm-hotplug-only-free-wait_table-if-its-allocated-by-vmalloc.patch added to -mm tree

[akpm]

The patch titled
     Subject: mm/hotplug: only free wait_table if it's allocated by vmalloc
has been added to the -mm tree.  Its filename is
     mm-hotplug-only-free-wait_table-if-its-allocated-by-vmalloc.patch

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------------------------------------------------------
From: Jianguo Wu <wujianguo@huawei.com>
Subject: mm/hotplug: only free wait_table if it's allocated by vmalloc

zone->wait_table may be allocated from bootmem, it can not be freed.

Signed-off-by: Jianguo Wu <wujianguo@huawei.com>
Reviewed-by: Tang Chen <tangchen@cn.fujitsu.com>
Cc: Tang Chen <tangchen@cn.fujitsu.com>
Cc: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/memory_hotplug.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff -puN mm/memory_hotplug.c~mm-hotplug-only-free-wait_table-if-its-allocated-by-vmalloc mm/memory_hotplug.c
--- a/mm/memory_hotplug.c~mm-hotplug-only-free-wait_table-if-its-allocated-by-vmalloc
+++ a/mm/memory_hotplug.c
@@ -1779,7 +1779,11 @@ void try_offline_node(int nid)
 	for (i = 0; i < MAX_NR_ZONES; i++) {
 		struct zone *zone = pgdat->node_zones + i;
 
-		if (zone->wait_table)
+		/*
+		 * wait_table may be allocated from boot memory,
+		 * here only free if it's allocated by vmalloc.
+		 */
+		if (is_vmalloc_addr(zone->wait_table))
 			vfree(zone->wait_table);
 	}
 
_

Patches currently in -mm which might be from wujianguo@huawei.com are

linux-next.patch
mm-hotplug-only-free-wait_table-if-its-allocated-by-vmalloc.patch
arch-x86-mm-init_64c-fix-build-warning-when-config_memory_hotremove=n.patch
mm-migrate-fix-comment-typo-syncronous-synchronous.patch