forked from Minki/linux
8ca4d19932
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(). As a good side-effect header "Stack Trace:" is now printed with the same log level as the rest of backtrace. [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: Vineet Gupta <vgupta@synopsys.com> Link: http://lkml.kernel.org/r/20200418201944.482088-4-dima@arista.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
35 lines
819 B
C
35 lines
819 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
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*/
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#ifndef _ASM_ARC_BUG_H
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#define _ASM_ARC_BUG_H
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#ifndef __ASSEMBLY__
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#include <asm/ptrace.h>
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struct task_struct;
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void show_regs(struct pt_regs *regs);
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void show_stacktrace(struct task_struct *tsk, struct pt_regs *regs,
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const char *loglvl);
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void show_kernel_fault_diag(const char *str, struct pt_regs *regs,
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unsigned long address);
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void die(const char *str, struct pt_regs *regs, unsigned long address);
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#define BUG() do { \
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pr_warn("BUG: failure at %s:%d/%s()!\n", __FILE__, __LINE__, __func__); \
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barrier_before_unreachable(); \
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__builtin_trap(); \
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} while (0)
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#define HAVE_ARCH_BUG
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#include <asm-generic/bug.h>
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#endif /* !__ASSEMBLY__ */
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#endif
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