mm: uninline page_mapped() (1aa8aea5) · Commits · 戴 / test

include/linux/mm.h

+1 −20

Original line number	Diff line number	Diff line
		@@ -1032,26 +1032,7 @@ static inline pgoff_t page_file_index(struct page *page)
		return page->index;
		}

		/*
		* Return true if this page is mapped into pagetables.
		* For compound page it returns true if any subpage of compound page is mapped.
		*/
		static inline bool page_mapped(struct page *page)
		{
		int i;
		if (likely(!PageCompound(page)))
		return atomic_read(&page->_mapcount) >= 0;
		page = compound_head(page);
		if (atomic_read(compound_mapcount_ptr(page)) >= 0)
		return true;
		if (PageHuge(page))
		return false;
		for (i = 0; i < hpage_nr_pages(page); i++) {
		if (atomic_read(&page[i]._mapcount) >= 0)
		return true;
		}
		return false;
		}
		bool page_mapped(struct page *page);

		/*
		* Return true only if the page has been allocated with

+23 −0

Original line number	Diff line number	Diff line
		@@ -346,6 +346,29 @@ void page_rmapping(struct page page)
		return __page_rmapping(page);
		}

		/*
		* Return true if this page is mapped into pagetables.
		* For compound page it returns true if any subpage of compound page is mapped.
		*/
		bool page_mapped(struct page *page)
		{
		int i;

		if (likely(!PageCompound(page)))
		return atomic_read(&page->_mapcount) >= 0;
		page = compound_head(page);
		if (atomic_read(compound_mapcount_ptr(page)) >= 0)
		return true;
		if (PageHuge(page))
		return false;
		for (i = 0; i < hpage_nr_pages(page); i++) {
		if (atomic_read(&page[i]._mapcount) >= 0)
		return true;
		}
		return false;
		}
		EXPORT_SYMBOL(page_mapped);

		struct anon_vma page_anon_vma(struct page page)
		{
		unsigned long mapping;