Messages in this thread Patch in this message | | | From | Minchan Kim <> | Subject | [PATCH 1/7] Introduce delete_from_page_cache | Date | Thu, 23 Dec 2010 00:32:43 +0900 |
| |
This function works as just wrapper remove_from_page_cache. The difference is that it decreases page references in itself. So caller have to make sure it has a page reference before calling.
This patch is ready for removing remove_from_page_cache.
Cc: Christoph Hellwig <hch@infradead.org> Cc: Hugh Dickins <hughd@google.com> Signed-off-by: Minchan Kim <minchan.kim@gmail.com> --- include/linux/pagemap.h | 1 + mm/filemap.c | 17 +++++++++++++++++ 2 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 9c66e99..7a1cb49 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -457,6 +457,7 @@ int add_to_page_cache_lru(struct page *page, struct address_space *mapping, pgoff_t index, gfp_t gfp_mask); extern void remove_from_page_cache(struct page *page); extern void __remove_from_page_cache(struct page *page); +extern void delete_from_page_cache(struct page *page); /* * Like add_to_page_cache_locked, but used to add newly allocated pages: diff --git a/mm/filemap.c b/mm/filemap.c index 095c393..1ca7475 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -166,6 +166,23 @@ void remove_from_page_cache(struct page *page) } EXPORT_SYMBOL(remove_from_page_cache); +/** + * delete_from_page_cache - delete page from page cache + * + * @page: the page which the kernel is trying to remove from page cache + * + * This must be called only on pages that have + * been verified to be in the page cache and locked. + * It will never put the page into the free list, + * the caller has a reference on the page. + */ +void delete_from_page_cache(struct page *page) +{ + remove_from_page_cache(page); + page_cache_release(page); +} +EXPORT_SYMBOL(delete_from_page_cache); + static int sync_page(void *word) { struct address_space *mapping; -- 1.7.0.4
| |