提交 e5dfaceb 编写于 作者: liulangrenaaa's avatar liulangrenaaa 提交者: Linus Torvalds

mm/hugetlb.c: just use put_page_testzero() instead of page_count()

We test the page reference count is zero or not here, it can be a bug here
if page refercence count is not zero.  So we can just use
put_page_testzero() instead of page_count().

Link: https://lkml.kernel.org/r/20201007170949.GA6416@rlkSigned-off-by: liulangrenaaa's avatarHui Su <sh_def@163.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
上级 3f4b815a
...@@ -2014,8 +2014,7 @@ static int gather_surplus_pages(struct hstate *h, int delta) ...@@ -2014,8 +2014,7 @@ static int gather_surplus_pages(struct hstate *h, int delta)
* This page is now managed by the hugetlb allocator and has * This page is now managed by the hugetlb allocator and has
* no users -- drop the buddy allocator's reference. * no users -- drop the buddy allocator's reference.
*/ */
put_page_testzero(page); VM_BUG_ON_PAGE(!put_page_testzero(page), page);
VM_BUG_ON_PAGE(page_count(page), page);
enqueue_huge_page(h, page); enqueue_huge_page(h, page);
} }
free: free:
......
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