filemap: convert filemap_range_has_writeback() to use folios

Removes 3 calls to compound_head().

Link: https://lkml.kernel.org/r/20220905214557.868606-1-vishal.moola@gmail.com
Signed-off-by: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/filemap.c b/mm/filemap.c
index 68bd70f..aab125d 100644 (file)
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -632,22 +632,23 @@ bool filemap_range_has_writeback(struct address_space *mapping,
 {
        XA_STATE(xas, &mapping->i_pages, start_byte >> PAGE_SHIFT);
        pgoff_t max = end_byte >> PAGE_SHIFT;
-       struct page *page;
+       struct folio *folio;
 
        if (end_byte < start_byte)
                return false;
 
        rcu_read_lock();
-       xas_for_each(&xas, page, max) {
-               if (xas_retry(&xas, page))
+       xas_for_each(&xas, folio, max) {
+               if (xas_retry(&xas, folio))
                        continue;
-               if (xa_is_value(page))
+               if (xa_is_value(folio))
                        continue;
-               if (PageDirty(page) || PageLocked(page) || PageWriteback(page))
+               if (folio_test_dirty(folio) || folio_test_locked(folio) ||
+                               folio_test_writeback(folio))
                        break;
        }
        rcu_read_unlock();
-       return page != NULL;
+       return folio != NULL;
 }
 EXPORT_SYMBOL_GPL(filemap_range_has_writeback);