hugetlb: alloc_bootmem_huge_page(): use IS_ALIGNED()

No reason to duplicate the code of an existing macro.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Acked-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/hugetlb.c

@@ -1457,7 +1457,7 @@ int __weak alloc_bootmem_huge_page(struct hstate *h)
 	return 0;
 
 found:
-	BUG_ON((unsigned long)virt_to_phys(m) & (huge_page_size(h) - 1));
+	BUG_ON(!IS_ALIGNED(virt_to_phys(m), huge_page_size(h)));
 	/* Put them into a private list first because mem_map is not up yet */
 	list_add(&m->list, &huge_boot_pages);
 	m->hstate = h;