From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752928AbaCHEJI (ORCPT ); Fri, 7 Mar 2014 23:09:08 -0500 Received: from mail-pb0-f54.google.com ([209.85.160.54]:38177 "EHLO mail-pb0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752153AbaCHEJG (ORCPT ); Fri, 7 Mar 2014 23:09:06 -0500 Date: Sat, 8 Mar 2014 12:09:04 +0800 From: Liu Shuo To: Kees Cook Cc: Andrew Morton , Liu ShuoX , LKML , Tony Luck , Colin Cross , Anton Vorontsov , yanmin_zhang@linux.intel.com Subject: [PATCH] pstore: clarify clearing of _read_cnt in ramoops_context Message-ID: <20140308040901.GA8339@shuo-gentoo> References: <1393569464-14904-1-git-send-email-shuox.liu@intel.com> <20140304014002.GA10071@lskakaxi-intel> <20140307025842.GA6435@lskakaxi-intel> <20140307132514.b6c596879f78478cad190e65@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: X-Mailer: Mutt 1.5.x/OS X 10.7.x User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri 7.Mar'14 at 16:23:29 -0800, Kees Cook wrote: >On Fri, Mar 7, 2014 at 1:25 PM, Andrew Morton wrote: >> On Fri, 7 Mar 2014 10:58:43 +0800 Liu ShuoX wrote: >> >>> >>> ftrace_read_cnt need to be reset in open to support mutli times >>> getting the records. >>> >>> Signed-off-by: Liu ShuoX >>> --- >>> fs/pstore/ram.c | 3 ++- >>> 1 file changed, 2 insertions(+), 1 deletion(-) >>> ... >> >> The dump_read_cnt changes appear to be unrelated to the actual bugfix? > >I recommended this change since it is being cleared during open, and >this zeroing was confusing. > >> If so, please send this along as a separate patch. With a full >> changelog - this one doesn't explain the dump_read_cnt changes at all. > >Liu, I would recommend a changelog along the lines of: > >Clarify which variables need to be cleared during pstore_open. Added >missed ftrace_read_cnt clearing and removed duplicate clearing in >ramoops_probe. > >-Kees Thanks. It's more clearly. I copied some of your comments into changelog. :) Re-sent the patch with the new changelog. The subject also changed. ---- From: Liu ShuoX *_read_cnt in ramoops_context need to be cleared during pstore ->open to support mutli times getting the records. The patch added missed ftrace_read_cnt clearing and removed duplicate clearing in ramoops_probe. Signed-off-by: Liu ShuoX --- fs/pstore/ram.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c index fa8cef2..9fe5b13 100644 --- a/fs/pstore/ram.c +++ b/fs/pstore/ram.c @@ -86,6 +86,7 @@ struct ramoops_context { struct persistent_ram_ecc_info ecc_info; unsigned int max_dump_cnt; unsigned int dump_write_cnt; + /* _read_cnt need clear on ramoops_pstore_open */ unsigned int dump_read_cnt; unsigned int console_read_cnt; unsigned int ftrace_read_cnt; @@ -101,6 +102,7 @@ static int ramoops_pstore_open(struct pstore_info *psi) cxt->dump_read_cnt = 0; cxt->console_read_cnt = 0; + cxt->ftrace_read_cnt = 0; return 0; } @@ -428,7 +430,6 @@ static int ramoops_probe(struct platform_device *pdev) if (pdata->ftrace_size && !is_power_of_2(pdata->ftrace_size)) pdata->ftrace_size = rounddown_pow_of_two(pdata->ftrace_size); - cxt->dump_read_cnt = 0; cxt->size = pdata->mem_size; cxt->phys_addr = pdata->mem_address; cxt->record_size = pdata->record_size; -- 1.8.3.2