From 3f045de7f557850ca6b3632c6d45c2cdaf948694 Mon Sep 17 00:00:00 2001 From: Nam Cao Date: Wed, 9 Jul 2025 21:21:14 +0200 Subject: panic: Add vpanic() vpanic() is useful for implementing runtime verification reactors. Add it. Signed-off-by: Nam Cao Reviewed-by: Petr Mladek Signed-off-by: Steven Rostedt (Google) --- kernel/panic.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) (limited to 'kernel/panic.c') diff --git a/kernel/panic.c b/kernel/panic.c index b0b9a8bf4560..6a1823c383d0 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -309,13 +309,13 @@ static void panic_other_cpus_shutdown(bool crash_kexec) /** * panic - halt the system * @fmt: The text string to print + * @args: Arguments for the format string * * Display a message, then perform cleanups. This function never returns. */ -void panic(const char *fmt, ...) +void vpanic(const char *fmt, va_list args) { static char buf[1024]; - va_list args; long i, i_next = 0, len; int state = 0; int old_cpu, this_cpu; @@ -366,9 +366,7 @@ void panic(const char *fmt, ...) console_verbose(); bust_spinlocks(1); - va_start(args, fmt); len = vscnprintf(buf, sizeof(buf), fmt, args); - va_end(args); if (len && buf[len - 1] == '\n') buf[len - 1] = '\0'; @@ -505,7 +503,17 @@ void panic(const char *fmt, ...) mdelay(PANIC_TIMER_STEP); } } +EXPORT_SYMBOL(vpanic); +/* Identical to vpanic(), except it takes variadic arguments instead of va_list */ +void panic(const char *fmt, ...) +{ + va_list args; + + va_start(args, fmt); + vpanic(fmt, args); + va_end(args); +} EXPORT_SYMBOL(panic); #define TAINT_FLAG(taint, _c_true, _c_false, _module) \ -- cgit v1.2.3