arch/x86/mm/numa.c: initialize numa_kernel_nodes in numa_clear_kernel…

…_node_hotplug()

On-stack variable numa_kernel_nodes in numa_clear_kernel_node_hotplug()
was not initialized.  So we need to initialize it.

[[email protected]: use NODE_MASK_NONE, per David]
Signed-off-by: Tang Chen <[email protected]>
Tested-by: Gu Zheng <[email protected]>
Reported-by: Dave Jones <[email protected]>
Reported-by: David Rientjes <[email protected]>
Tested-by: Dave Jones <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

arch/x86/mm/numa.c

@@ -565,7 +565,7 @@ static void __init numa_init_array(void)
 static void __init numa_clear_kernel_node_hotplug(void)
 {
 	int i, nid;
-	nodemask_t numa_kernel_nodes;
+	nodemask_t numa_kernel_nodes = NODE_MASK_NONE;
 	unsigned long start, end;
 	struct memblock_type *type = &memblock.reserved;