mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 01:10:04 +00:00
14b0dd870f
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. Add log level parameter to microblaze_unwind() as a preparation to add show_stack_loglvl(). [1]: https://lore.kernel.org/lkml/20190528002412.1625-1-dima@arista.com/T/#u Signed-off-by: Dmitry Safonov <dima@arista.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Michal Simek <monstr@monstr.eu> Link: http://lkml.kernel.org/r/20200418201944.482088-20-dima@arista.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
31 lines
830 B
C
31 lines
830 B
C
/*
|
|
* Stack trace support for Microblaze.
|
|
*
|
|
* Copyright (C) 2009 Michal Simek <monstr@monstr.eu>
|
|
* Copyright (C) 2009 PetaLogix
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*/
|
|
|
|
#include <linux/export.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/stacktrace.h>
|
|
#include <linux/thread_info.h>
|
|
#include <linux/ptrace.h>
|
|
#include <asm/unwind.h>
|
|
|
|
void save_stack_trace(struct stack_trace *trace)
|
|
{
|
|
/* Exclude our helper functions from the trace*/
|
|
trace->skip += 2;
|
|
microblaze_unwind(NULL, trace, "");
|
|
}
|
|
EXPORT_SYMBOL_GPL(save_stack_trace);
|
|
|
|
void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
|
|
{
|
|
microblaze_unwind(tsk, trace, "");
|
|
}
|
|
EXPORT_SYMBOL_GPL(save_stack_trace_tsk);
|