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86dca36e6b
printk_ratelimit() shares the ratelimiting state with other callers what may lead to scenarios where at the time we want to print out debug information we already limited, so nothing appears in the dmesg - this makes exception-trace quite poor helper in debugging. Additionally, we have imbalance with some messages limited with global ratelimit state and other messages limited with their private state defined via pr_*_ratelimited(). To address this inconsistency show_unhandled_signals_ratelimited() macro is introduced and caller sites are converted to use it. Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
68 lines
2.0 KiB
C
68 lines
2.0 KiB
C
/*
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* Based on arch/arm/include/asm/system_misc.h
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*
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* Copyright (C) 2012 ARM Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __ASM_SYSTEM_MISC_H
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#define __ASM_SYSTEM_MISC_H
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#ifndef __ASSEMBLY__
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#include <linux/compiler.h>
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#include <linux/linkage.h>
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#include <linux/irqflags.h>
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#include <linux/signal.h>
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#include <linux/ratelimit.h>
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#include <linux/reboot.h>
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struct pt_regs;
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void die(const char *msg, struct pt_regs *regs, int err);
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struct siginfo;
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void arm64_notify_die(const char *str, struct pt_regs *regs,
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struct siginfo *info, int err);
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void hook_debug_fault_code(int nr, int (*fn)(unsigned long, unsigned int,
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struct pt_regs *),
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int sig, int code, const char *name);
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struct mm_struct;
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extern void show_pte(struct mm_struct *mm, unsigned long addr);
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extern void __show_regs(struct pt_regs *);
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extern void (*arm_pm_restart)(enum reboot_mode reboot_mode, const char *cmd);
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#define show_unhandled_signals_ratelimited() \
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({ \
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static DEFINE_RATELIMIT_STATE(_rs, \
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DEFAULT_RATELIMIT_INTERVAL, \
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DEFAULT_RATELIMIT_BURST); \
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bool __show_ratelimited = false; \
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if (show_unhandled_signals && __ratelimit(&_rs)) \
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__show_ratelimited = true; \
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__show_ratelimited; \
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})
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#define UDBG_UNDEFINED (1 << 0)
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#define UDBG_SYSCALL (1 << 1)
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#define UDBG_BADABORT (1 << 2)
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#define UDBG_SEGV (1 << 3)
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#define UDBG_BUS (1 << 4)
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#endif /* __ASSEMBLY__ */
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#endif /* __ASM_SYSTEM_MISC_H */
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