[f2fs-dev] [PATCH 24/27] f2fs: Convert truncate_partial_data_page() to use a folio

[Matthew Wilcox (Oracle)]

Retrieve a folio from the page cache and use it throughout.
Saves five hidden calls to compound_head().

Signed-off-by: Matthew Wilcox (Oracle) <wi...@infradead.org>
---
 fs/f2fs/file.c | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index f2f298c75921..db2778758dda 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -707,31 +707,33 @@ static int truncate_partial_data_page(struct inode 
*inode, u64 from,
        loff_t offset = from & (PAGE_SIZE - 1);
        pgoff_t index = from >> PAGE_SHIFT;
        struct address_space *mapping = inode->i_mapping;
-       struct page *page;
+       struct folio *folio;
 
        if (!offset && !cache_only)
                return 0;
 
        if (cache_only) {
-               page = find_lock_page(mapping, index);
-               if (page && PageUptodate(page))
+               folio = filemap_lock_folio(mapping, index);
+               if (IS_ERR(folio))
+                      return 0;
+               if (folio_test_uptodate(folio))
                        goto truncate_out;
-               f2fs_put_page(page, 1);
+               f2fs_folio_put(folio, true);
                return 0;
        }
 
-       page = f2fs_get_lock_data_page(inode, index, true);
-       if (IS_ERR(page))
-               return PTR_ERR(page) == -ENOENT ? 0 : PTR_ERR(page);
+       folio = f2fs_get_lock_data_folio(inode, index, true);
+       if (IS_ERR(folio))
+               return PTR_ERR(folio) == -ENOENT ? 0 : PTR_ERR(folio);
 truncate_out:
-       f2fs_wait_on_page_writeback(page, DATA, true, true);
-       zero_user(page, offset, PAGE_SIZE - offset);
+       f2fs_folio_wait_writeback(folio, DATA, true, true);
+       folio_zero_segment(folio, offset, folio_size(folio));
 
        /* An encrypted inode should have a key and truncate the last page. */
        f2fs_bug_on(F2FS_I_SB(inode), cache_only && IS_ENCRYPTED(inode));
        if (!cache_only)
-               set_page_dirty(page);
-       f2fs_put_page(page, 1);
+               folio_mark_dirty(folio);
+       f2fs_folio_put(folio, true);
        return 0;
 }
 
-- 
2.47.2



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