__get_first_dirty_index() wants to lookup only the first dirty page
after given index. There's no point in using pagevec_lookup_tag() for
that. Just use find_get_pages_tag() directly.

CC: Jaegeuk Kim <jaeg...@kernel.org>
CC: linux-f2fs-de...@lists.sourceforge.net
Signed-off-by: Jan Kara <j...@suse.cz>
---
 fs/f2fs/file.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 61af721329fa..52df1ef66883 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -286,18 +286,19 @@ int f2fs_sync_file(struct file *file, loff_t start, 
loff_t end, int datasync)
 static pgoff_t __get_first_dirty_index(struct address_space *mapping,
                                                pgoff_t pgofs, int whence)
 {
-       struct pagevec pvec;
+       struct page *page;
        int nr_pages;
 
        if (whence != SEEK_DATA)
                return 0;
 
        /* find first dirty page index */
-       pagevec_init(&pvec, 0);
-       nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs,
-                                       PAGECACHE_TAG_DIRTY, 1);
-       pgofs = nr_pages ? pvec.pages[0]->index : ULONG_MAX;
-       pagevec_release(&pvec);
+       nr_pages = find_get_pages_tag(mapping, &pgofs, PAGECACHE_TAG_DIRTY,
+                                     1, &page);
+       if (!nr_pages)
+               return ULONG_MAX;
+       pgofs = page->index;
+       put_page(page);
        return pgofs;
 }
 
-- 
2.12.3

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