mm: delete find_get_entries_tag (a1b8e6ab) · Commits · 戴 / test

include/linux/pagemap.h

+0 −3

Original line number	Diff line number	Diff line
		@@ -373,9 +373,6 @@ static inline unsigned find_get_pages_tag(struct address_space *mapping,
		return find_get_pages_range_tag(mapping, index, (pgoff_t)-1, tag,
		nr_pages, pages);
		}
		unsigned find_get_entries_tag(struct address_space *mapping, pgoff_t start,
		xa_mark_t tag, unsigned int nr_entries,
		struct page *entries, pgoff_t indices);

		struct page grab_cache_page_write_begin(struct address_space mapping,
		pgoff_t index, unsigned flags);

mm/filemap.c

+0 −61

Original line number	Diff line number	Diff line
		@@ -1941,67 +1941,6 @@ out:
		}
		EXPORT_SYMBOL(find_get_pages_range_tag);

		/**
		* find_get_entries_tag - find and return entries that match @tag
		* @mapping: the address_space to search
		* @start: the starting page cache index
		* @tag: the tag index
		* @nr_entries: the maximum number of entries
		* @entries: where the resulting entries are placed
		* @indices: the cache indices corresponding to the entries in @entries
		*
		* Like find_get_entries, except we only return entries which are tagged with
		* @tag.
		*
		* Return: the number of entries which were found.
		*/
		unsigned find_get_entries_tag(struct address_space *mapping, pgoff_t start,
		xa_mark_t tag, unsigned int nr_entries,
		struct page *entries, pgoff_t indices)
		{
		XA_STATE(xas, &mapping->i_pages, start);
		struct page *page;
		unsigned int ret = 0;

		if (!nr_entries)
		return 0;

		rcu_read_lock();
		xas_for_each_marked(&xas, page, ULONG_MAX, tag) {
		if (xas_retry(&xas, page))
		continue;
		/*
		* A shadow entry of a recently evicted page, a swap
		* entry from shmem/tmpfs or a DAX entry. Return it
		* without attempting to raise page count.
		*/
		if (xa_is_value(page))
		goto export;

		if (!page_cache_get_speculative(page))
		goto retry;

		/* Has the page moved or been split? */
		if (unlikely(page != xas_reload(&xas)))
		goto put_page;
		page = find_subpage(page, xas.xa_index);

		export:
		indices[ret] = xas.xa_index;
		entries[ret] = page;
		if (++ret == nr_entries)
		break;
		continue;
		put_page:
		put_page(page);
		retry:
		xas_reset(&xas);
		}
		rcu_read_unlock();
		return ret;
		}
		EXPORT_SYMBOL(find_get_entries_tag);

		/*
		* CD/DVDs are error prone. When a medium error occurs, the driver may fail
		* a _large_ part of the i/o request. Imagine the worst scenario:

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