[PATCH resend] mm/page_alloc: fix comment is __get_free_pages

[JianKang Chen]

From: Jiankang Chen <chenjiankang1@xxxxxxxxxx>

__get_free_pages will return an virtual address, 
but it is not just 32-bit address, for example a 64-bit system. 
And this comment really confuse new bigenner of mm.

reported-by: Hanjun Guo <guohanjun@xxxxxxxxxx>
Signed-off-by: Jiankang Chen <chenjiankang1@xxxxxxxxxx>
---
 mm/page_alloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 77e4d3c..5a7c432 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4240,7 +4240,7 @@ unsigned long __get_free_pages(gfp_t gfp_mask, unsigned int order)
 	struct page *page;
 
 	/*
-	 * __get_free_pages() returns a 32-bit address, which cannot represent
+	 * __get_free_pages() returns a virtual address, which cannot represent
 	 * a highmem page
 	 */
 	VM_BUG_ON((gfp_mask & __GFP_HIGHMEM) != 0);
-- 
1.7.12.4