wdata_alloc_and_fillpages() needlessly iterates calls to
find_get_pages_tag(). Also it wants only pages from given range. Make it
use find_get_pages_range_tag().
Suggested-by: Daniel Jordan <daniel.m.jordan@xxxxxxxxxx>
CC: linux-cifs@xxxxxxxxxxxxxxx
CC: Steve French <sfrench@xxxxxxxxx>
Signed-off-by: Jan Kara <jack@xxxxxxx>
---
fs/cifs/file.c | 21 ++-------------------
1 file changed, 2 insertions(+), 19 deletions(-)
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 92fdf9c35de2..df9f682708c6 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1963,8 +1963,6 @@ wdata_alloc_and_fillpages(pgoff_t tofind, struct address_space *mapping,
pgoff_t end, pgoff_t *index,
unsigned int *found_pages)
{
- unsigned int nr_pages;
- struct page **pages;
struct cifs_writedata *wdata;
wdata = cifs_writedata_alloc((unsigned int)tofind,
@@ -1972,23 +1970,8 @@ wdata_alloc_and_fillpages(pgoff_t tofind, struct address_space *mapping,
if (!wdata)
return NULL;
- /*
- * find_get_pages_tag seems to return a max of 256 on each
- * iteration, so we must call it several times in order to
- * fill the array or the wsize is effectively limited to
- * 256 * PAGE_SIZE.
- */
- *found_pages = 0;
- pages = wdata->pages;
- do {
- nr_pages = find_get_pages_tag(mapping, index,
- PAGECACHE_TAG_DIRTY, tofind,
- pages);
- *found_pages += nr_pages;
- tofind -= nr_pages;
- pages += nr_pages;
- } while (nr_pages && tofind && *index <= end);
-
+ *found_pages = find_get_pages_range_tag(mapping, index, end,
+ PAGECACHE_TAG_DIRTY, tofind, wdata->pages);
return wdata;
}
--
2.12.3
