mm/slub: fix a typo in comment "disambiguiation"->"disambiguation"

There is a typo in comment, fix it.
Signed-off-by: Ethon Paul <ethp@qq.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: David Rientjes <rientjes@google.com>
Link: http://lkml.kernel.org/r/20200411002247.14468-1-ethp@qq.comSigned-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/slub.c

@@ -2013,7 +2013,7 @@ static void *get_partial(struct kmem_cache *s, gfp_t flags, int node,
 
 #ifdef CONFIG_PREEMPTION
 /*
- * Calculate the next globally unique transaction for disambiguiation
+ * Calculate the next globally unique transaction for disambiguation
  * during cmpxchg. The transactions start with the cpu number and are then
  * incremented by CONFIG_NR_CPUS.
  */