From mboxrd@z Thu Jan 1 00:00:00 1970 From: Artem Bityutskiy Subject: [PATCH 1/4] writeback: weed out unneeded code Date: Mon, 12 Jul 2010 10:49:51 +0300 Message-ID: <1278920994-2402-2-git-send-email-dedekind1@gmail.com> References: <1278920994-2402-1-git-send-email-dedekind1@gmail.com> Cc: Christoph Hellwig , linux-fsdevel@vger.kernel.org To: Jens Axboe Return-path: Received: from smtp.nokia.com ([192.100.122.233]:27018 "EHLO mgw-mx06.nokia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751265Ab0GLHyf (ORCPT ); Mon, 12 Jul 2010 03:54:35 -0400 In-Reply-To: <1278920994-2402-1-git-send-email-dedekind1@gmail.com> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: From: Artem Bityutskiy The only user of 'bdi_add_to_pending()' is the default BDI forker task ('bdi_forker_task()'). And 'bdi_add_to_pending()' wakes up the forker BDI task, i.e., itself, which is unnecessary. The patch weeds out the unneeded 'wake_up_process()' call. Signed-off-by: Artem Bityutskiy --- mm/backing-dev.c | 6 ------ 1 files changed, 0 insertions(+), 6 deletions(-) diff --git a/mm/backing-dev.c b/mm/backing-dev.c index ac78a33..ff5669a 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -421,12 +421,6 @@ static void bdi_add_to_pending(struct rcu_head *head) spin_lock(&bdi_lock); list_add_tail(&bdi->bdi_list, &bdi_pending_list); spin_unlock(&bdi_lock); - - /* - * We are now on the pending list, wake up bdi_forker_task() - * to finish the job and add us back to the active bdi_list - */ - wake_up_process(default_backing_dev_info.wb.task); } /* -- 1.7.1.1