From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:57763 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754261AbcHBH1g (ORCPT ); Tue, 2 Aug 2016 03:27:36 -0400 Subject: Patch "arc: unwind: warn only once if DW2_UNWIND is disabled" has been added to the 3.14-stable tree To: Alexey.Brodkin@synopsys.com Cc: , From: Date: Tue, 02 Aug 2016 09:03:26 +0200 Message-ID: <147012140622069@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled arc: unwind: warn only once if DW2_UNWIND is disabled to the 3.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: arc-unwind-warn-only-once-if-dw2_unwind-is-disabled.patch and it can be found in the queue-3.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 9bd54517ee86cb164c734f72ea95aeba4804f10b Mon Sep 17 00:00:00 2001 From: Alexey Brodkin Date: Thu, 23 Jun 2016 11:00:39 +0300 Subject: arc: unwind: warn only once if DW2_UNWIND is disabled From: Alexey Brodkin commit 9bd54517ee86cb164c734f72ea95aeba4804f10b upstream. If CONFIG_ARC_DW2_UNWIND is disabled every time arc_unwind_core() gets called following message gets printed in debug console: ----------------->8--------------- CONFIG_ARC_DW2_UNWIND needs to be enabled ----------------->8--------------- That message makes sense if user indeed wants to see a backtrace or get nice function call-graphs in perf but what if user disabled unwinder for the purpose? Why pollute his debug console? So instead we'll warn user about possibly missing feature once and let him decide if that was what he or she really wanted. Signed-off-by: Alexey Brodkin Signed-off-by: Vineet Gupta Signed-off-by: Greg Kroah-Hartman --- arch/arc/kernel/stacktrace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/arc/kernel/stacktrace.c +++ b/arch/arc/kernel/stacktrace.c @@ -131,7 +131,7 @@ arc_unwind_core(struct task_struct *tsk, * prelogue is setup (callee regs saved and then fp set and not other * way around */ - pr_warn("CONFIG_ARC_DW2_UNWIND needs to be enabled\n"); + pr_warn_once("CONFIG_ARC_DW2_UNWIND needs to be enabled\n"); return 0; #endif Patches currently in stable-queue which might be from Alexey.Brodkin@synopsys.com are queue-3.14/arc-unwind-warn-only-once-if-dw2_unwind-is-disabled.patch