[17/35] ext4: Use pagevec_lookup_range_tag()

Commit Message

Jan Kara June 1, 2017, 9:32 a.m. UTC

We want only pages from given range in ext4_writepages(). Use
pagevec_lookup_range_tag() instead of pagevec_lookup_tag() and remove
unnecessary code.

CC: "Theodore Ts'o" <[e-mail]>
CC: [e-mail]
Signed-off-by: Jan Kara <[e-mail]>
---
 fs/ext4/inode.c | 14 ++------------
 1 file changed, 2 insertions(+), 12 deletions(-)

Patch

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index ace4bb9073d8..050fba2d12c2 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2555,8 +2555,8 @@  static int mpage_prepare_extent_to_map(struct mpage_da_data *mpd)
 	mpd->map.m_len = 0;
 	mpd->next_page = index;
 	while (index <= end) {
-		nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag,
-			      min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
+		nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end,
+				tag, PAGEVEC_SIZE);
 		if (nr_pages == 0)
 			goto out;
 
@@ -2564,16 +2564,6 @@  static int mpage_prepare_extent_to_map(struct mpage_da_data *mpd)
 			struct page *page = pvec.pages[i];
 
 			/*
-			 * At this point, the page may be truncated or
-			 * invalidated (changing page->mapping to NULL), or
-			 * even swizzled back from swapper_space to tmpfs file
-			 * mapping. However, page->index will not change
-			 * because we have a reference on the page.
-			 */
-			if (page->index > end)
-				goto out;
-
-			/*
 			 * Accumulated enough dirty pages? This doesn't apply
 			 * to WB_SYNC_ALL mode. For integrity sync we have to
 			 * keep going because someone may be concurrently