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| author | Thomas Gleixner <tglx@linutronix.de> | 2023-09-11 18:53:04 +0300 |
|---|---|---|
| committer | Andy Hu <andy.hu@starfivetech.com> | 2024-12-06 13:24:25 +0300 |
| commit | 22379f4cea9f986c22b43be022f7848e59db94c2 (patch) | |
| tree | f3e8268474c073f665eeff37322667374d8bfbc6 | |
| parent | 7452ccc764296bb307d8f263390b53ed76575bc5 (diff) | |
| download | linux-22379f4cea9f986c22b43be022f7848e59db94c2.tar.xz | |
panic: Mark emergency section in warn
Mark the full contents of __warn() as an emergency section. In
this section, the CPU will not perform console output for the
printk() calls. Instead, a flushing of the console output will
triggered when exiting the emergency section.
Co-developed-by: John Ogness <john.ogness@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Signed-off-by: Thomas Gleixner (Intel) <tglx@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
| -rw-r--r-- | kernel/panic.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/panic.c b/kernel/panic.c index f0e91a0c4001..147803c3a402 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -663,6 +663,8 @@ struct warn_args { void __warn(const char *file, int line, void *caller, unsigned taint, struct pt_regs *regs, struct warn_args *args) { + nbcon_cpu_emergency_enter(); + disable_trace_on_warning(); if (file) @@ -693,6 +695,8 @@ void __warn(const char *file, int line, void *caller, unsigned taint, /* Just a warning, don't kill lockdep. */ add_taint(taint, LOCKDEP_STILL_OK); + + nbcon_cpu_emergency_exit(); } #ifdef CONFIG_BUG |