From mboxrd@z Thu Jan 1 00:00:00 1970 From: akpm@linux-foundation.org Subject: [merged] arm-add-show_stack_loglvl.patch removed from -mm tree Date: Tue, 09 Jun 2020 17:37:12 -0700 Message-ID: <20200610003712.OjvN807zm%akpm@linux-foundation.org> Reply-To: linux-kernel@vger.kernel.org Return-path: Received: from mail.kernel.org ([198.145.29.99]:39360 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726021AbgFJAhO (ORCPT ); Tue, 9 Jun 2020 20:37:14 -0400 Sender: mm-commits-owner@vger.kernel.org List-Id: mm-commits@vger.kernel.org To: dima@arista.com, linux@armlinux.org.uk, mm-commits@vger.kernel.org, will@kernel.org The patch titled Subject: arm: add show_stack_loglvl() has been removed from the -mm tree. Its filename was arm-add-show_stack_loglvl.patch This patch was dropped because it was merged into mainline or a subsystem tree ------------------------------------------------------ From: Dmitry Safonov Subject: arm: add show_stack_loglvl() Currently, the log-level of show_stack() depends on a platform realization. It creates situations where the headers are printed with lower log level or higher than the stacktrace (depending on a platform or user). Furthermore, it forces the logic decision from user to an architecture side. In result, some users as sysrq/kdb/etc are doing tricks with temporary rising console_loglevel while printing their messages. And in result it not only may print unwanted messages from other CPUs, but also omit printing at all in the unlucky case where the printk() was deferred. Introducing log-level parameter and KERN_UNSUPPRESSED [1] seems an easier approach than introducing more printk buffers. Also, it will consolidate printings with headers. Introduce show_stack_loglvl(), that eventually will substitute show_stack(). [1]: https://lore.kernel.org/lkml/20190528002412.1625-1-dima@arista.com/T/#u Link: http://lkml.kernel.org/r/20200418201944.482088-9-dima@arista.com Signed-off-by: Dmitry Safonov Cc: Russell King Cc: Will Deacon Signed-off-by: Andrew Morton --- arch/arm/kernel/traps.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) --- a/arch/arm/kernel/traps.c~arm-add-show_stack_loglvl +++ a/arch/arm/kernel/traps.c @@ -247,12 +247,18 @@ static void dump_backtrace(struct pt_reg } #endif -void show_stack(struct task_struct *tsk, unsigned long *sp) +void show_stack_loglvl(struct task_struct *tsk, unsigned long *sp, + const char *loglvl) { - dump_backtrace(NULL, tsk, KERN_DEFAULT); + dump_backtrace(NULL, tsk, loglvl); barrier(); } +void show_stack(struct task_struct *tsk, unsigned long *sp) +{ + show_stack_loglvl(tsk, sp, KERN_DEFAULT); +} + #ifdef CONFIG_PREEMPT #define S_PREEMPT " PREEMPT" #elif defined(CONFIG_PREEMPT_RT) _ Patches currently in -mm which might be from dima@arista.com are