nodemask: fix the declaration of NODEMASK_ALLOC()

we can't declarate two variable at the same scope by NODEMASK_ALLOC().

This patch fixes it.

Signed-off-by: Miao Xie <[e-mail]>
Cc: David Rientjes <[e-mail]>
Cc: Lee Schermerhorn <[e-mail]>
Cc: Nick Piggin <[e-mail]>
Cc: Paul Menage <[e-mail]>
Cc: Ingo Molnar <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

include/linux/nodemask.h

···
 			type *name = kmalloc(sizeof(*name), gfp_flags)
 #define NODEMASK_FREE(m)			kfree(m)
 #else
-#define NODEMASK_ALLOC(type, name, gfp_flags)	type _name, *name = &_name
+#define NODEMASK_ALLOC(type, name, gfp_flags)	type _##name, *name = &_##name
 #define NODEMASK_FREE(m)			do {} while (0)
 #endif