b=22610 a truncate_complete_page fix

truncate_complete_page implementation for the patchless
client could arbitrarily unset PG_Uptodate flag for a
page being kicked from the page cache, an uptodate check
right after a readpage call in filemap_fault could fail
because of that as though the page read had been unsuccessful.

i=Oleg Drokin
i=Johann Lombardi

diff --git a/lustre/include/linux/lustre_patchless_compat.h b/lustre/include/linux/lustre_patchless_compat.h
index 39fe8f9..17fbc5c 100644 (file)
--- a/lustre/include/linux/lustre_patchless_compat.h
+++ b/lustre/include/linux/lustre_patchless_compat.h
@@ -87,7 +87,6 @@ truncate_complete_page(struct address_space *mapping, struct page *page)
 #else
         clear_page_dirty(page);
 #endif
 #else
         clear_page_dirty(page);
 #endif

-        ClearPageUptodate(page);

         ClearPageMappedToDisk(page);
         ll_remove_from_page_cache(page);
         page_cache_release(page);       /* pagecache ref */
         ClearPageMappedToDisk(page);
         ll_remove_from_page_cache(page);
         page_cache_release(page);       /* pagecache ref */