Plug memory leak in writeseg_end_io

Signed-off-by: Joern Engel <[e-mail]>

fs/logfs/dev_bdev.c

···
 			prefetchw(&bvec->bv_page->flags);
 
 		end_page_writeback(page);
+		page_cache_release(page);
 	} while (bvec >= bio->bi_io_vec);
 	bio_put(bio);
 	if (atomic_dec_and_test(&super->s_pending_writes))