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authorMarco Elver <elver@google.com>2022-01-20 05:09:56 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2022-01-20 09:52:55 +0300
commit23b36fec7e14f8cf1c17e832e53dd4761e0dfe83 (patch)
tree68a8c60f5c697d1ac1e446577abed6d93f6c25c5 /kernel
parent25d2e88632c9069cb21e23340e14cd19b8a0b1df (diff)
downloadlinux-23b36fec7e14f8cf1c17e832e53dd4761e0dfe83.tar.xz
panic: use error_report_end tracepoint on warnings
Introduce the error detector "warning" to the error_report event and use the error_report_end tracepoint at the end of a warning report. This allows in-kernel tests but also userspace to more easily determine if a warning occurred without polling kernel logs. [akpm@linux-foundation.org: add comma to enum list, per Andy] Link: https://lkml.kernel.org/r/20211115085630.1756817-1-elver@google.com Signed-off-by: Marco Elver <elver@google.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Alexander Potapenko <glider@google.com> Cc: Petr Mladek <pmladek@suse.com> Cc: Luis Chamberlain <mcgrof@kernel.org> Cc: Wei Liu <wei.liu@kernel.org> Cc: Mike Rapoport <rppt@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: John Ogness <john.ogness@linutronix.de> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Alexander Popov <alex.popov@linux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/panic.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/panic.c b/kernel/panic.c
index cefd7d82366f..8e299cae1615 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -32,6 +32,7 @@
#include <linux/bug.h>
#include <linux/ratelimit.h>
#include <linux/debugfs.h>
+#include <trace/events/error_report.h>
#include <asm/sections.h>
#define PANIC_TIMER_STEP 100
@@ -609,6 +610,7 @@ void __warn(const char *file, int line, void *caller, unsigned taint,
print_irqtrace_events(current);
print_oops_end_marker();
+ trace_error_report_end(ERROR_DETECTOR_WARN, (unsigned long)caller);
/* Just a warning, don't kill lockdep. */
add_taint(taint, LOCKDEP_STILL_OK);