afs: use find_get_pages_range_tag()

Use find_get_pages_range_tag() in afs_writepages_region() as we are
interested only in pages from given range.  Remove unnecessary code
after this conversion.

Link: http://lkml.kernel.org/r/20171009151359.31984-16-jack@suse.cz
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/afs/write.c b/fs/afs/write.c
index 106e43db11153fc1faed12ab326e25d4a9dc3c7d..d62a6b54152def9cf7ab883dbda02ddc29a4d1a9 100644 (file)
--- a/fs/afs/write.c
+++ b/fs/afs/write.c
@@ -497,20 +497,13 @@ static int afs_writepages_region(struct address_space *mapping,
        _enter(",,%lx,%lx,", index, end);
 
        do {
-               n = find_get_pages_tag(mapping, &index, PAGECACHE_TAG_DIRTY,
-                                      1, &page);
+               n = find_get_pages_range_tag(mapping, &index, end,
+                                       PAGECACHE_TAG_DIRTY, 1, &page);
                if (!n)
                        break;
 
                _debug("wback %lx", page->index);
 
-               if (page->index > end) {
-                       *_next = index;
-                       put_page(page);
-                       _leave(" = 0 [%lx]", *_next);
-                       return 0;
-               }
-
                /* at this point we hold neither mapping->tree_lock nor lock on
                 * the page itself: the page may be truncated or invalidated
                 * (changing page->mapping to NULL), or even swizzled back from