Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932512AbbBTSNP (ORCPT ); Fri, 20 Feb 2015 13:13:15 -0500 Received: from mailrelay107.isp.belgacom.be ([195.238.20.134]:8656 "EHLO mailrelay107.isp.belgacom.be" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932166AbbBTSNI (ORCPT ); Fri, 20 Feb 2015 13:13:08 -0500 X-Belgacom-Dynamic: yes X-Cloudmark-SP-Filtered: true X-Cloudmark-SP-Result: v=1.1 cv=pojTLeLEEG+IB9MeyQ9xnWKWJHiyH+4Hnj5iAYu/pCk= c=1 sm=2 a=JfrnYn6hAAAA:8 a=kLUchSAeyg374jvaigYA:9 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A2DuCwAReOdU/zwEtFtbgwaxSgUBdpdNAoEYRAEBAQEBAXyEEAEFJy8jEFE5HhmIMwHCKJJPAQEBAQYCIIYEiXkHFoQVBZkRimyIRSKDbz0xgkMBAQE From: Fabian Frederick To: linux-kernel@vger.kernel.org Cc: Ingo Molnar , Peter Zijlstra , Greg Kroah-Hartman , Fabian Frederick , Hans Verkuil , Mauro Carvalho Chehab , linux-media@vger.kernel.org Subject: [PATCH 4/7 linux-next] saa7146: replace current->state by set_current_state() Date: Fri, 20 Feb 2015 19:12:54 +0100 Message-Id: <1424455977-21903-4-git-send-email-fabf@skynet.be> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1424455977-21903-1-git-send-email-fabf@skynet.be> References: <1424455977-21903-1-git-send-email-fabf@skynet.be> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1588 Lines: 43 Use helper functions to access current->state. Direct assignments are prone to races and therefore buggy. current->state = TASK_RUNNING can be replaced by __set_current_state() Thanks to Peter Zijlstra for the exact definition of the problem. Suggested-By: Peter Zijlstra Signed-off-by: Fabian Frederick --- drivers/media/common/saa7146/saa7146_vbi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/media/common/saa7146/saa7146_vbi.c b/drivers/media/common/saa7146/saa7146_vbi.c index 1e71e37..2da9957 100644 --- a/drivers/media/common/saa7146/saa7146_vbi.c +++ b/drivers/media/common/saa7146/saa7146_vbi.c @@ -95,7 +95,7 @@ static int vbi_workaround(struct saa7146_dev *dev) /* prepare to wait to be woken up by the irq-handler */ add_wait_queue(&vv->vbi_wq, &wait); - current->state = TASK_INTERRUPTIBLE; + set_current_state(TASK_INTERRUPTIBLE); /* start rps1 to enable workaround */ saa7146_write(dev, RPS_ADDR1, dev->d_rps1.dma_handle); @@ -106,7 +106,7 @@ static int vbi_workaround(struct saa7146_dev *dev) DEB_VBI("brs bug workaround %d/1\n", i); remove_wait_queue(&vv->vbi_wq, &wait); - current->state = TASK_RUNNING; + __set_current_state(TASK_RUNNING); /* disable rps1 irqs */ SAA7146_IER_DISABLE(dev,MASK_28); -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/