mm/rmap.c: use VM_BUG_ON_PAGE() in __page_check_anon_rmap() (30c46382) · Commits · 戴 / test

The __page_check_anon_rmap() just calls two BUG_ON()s protected by CONFIG_DEBUG_VM, the #ifdef could be eliminated by using VM_BUG_ON_PAGE(). Link: http://lkml.kernel.org/r/1573157346-111316-1-git-send-email-yang.shi@linux.alibaba.com Signed-off-by:

mm/rmap.c

+3 −4

Original line number	Diff line number	Diff line
		@@ -1075,7 +1075,6 @@ static void __page_set_anon_rmap(struct page *page,
		static void __page_check_anon_rmap(struct page *page,
		struct vm_area_struct *vma, unsigned long address)
		{
		#ifdef CONFIG_DEBUG_VM
		/*
		* The page's anon-rmap details (mapping and index) are guaranteed to
		* be set up correctly at this point.
		@@ -1088,9 +1087,9 @@ static void __page_check_anon_rmap(struct page *page,
		* are initially only visible via the pagetables, and the pte is locked
		* over the call to page_add_new_anon_rmap.
		*/
		BUG_ON(page_anon_vma(page)->root != vma->anon_vma->root);
		BUG_ON(page_to_pgoff(page) != linear_page_index(vma, address));
		#endif
		VM_BUG_ON_PAGE(page_anon_vma(page)->root != vma->anon_vma->root, page);
		VM_BUG_ON_PAGE(page_to_pgoff(page) != linear_page_index(vma, address),
		page);
		}

		/**