panic: Expose "warn_count" to sysfs
authorKees Cook <keescook@chromium.org>
Thu, 17 Nov 2022 23:43:26 +0000 (15:43 -0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 24 Jan 2023 06:24:41 +0000 (07:24 +0100)
commit72c93f9897e9599aee992f95895779dbbe634290
treeec68fa9ba1beac62090685111f4e9eb05933f534
parentf53b6dda4d9b6e4ba1af5efd6c6650784996b4e7
panic: Expose "warn_count" to sysfs

commit 8b05aa26336113c4cea25f1c333ee8cd4fc212a6 upstream.

Since Warn count is now tracked and is a fairly interesting signal, add
the entry /sys/kernel/warn_count to expose it to userspace.

Cc: Petr Mladek <pmladek@suse.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: tangmeng <tangmeng@uniontech.com>
Cc: "Guilherme G. Piccoli" <gpiccoli@igalia.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Tiezhu Yang <yangtiezhu@loongson.cn>
Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20221117234328.594699-6-keescook@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Documentation/ABI/testing/sysfs-kernel-warn_count [new file with mode: 0644]
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kernel/panic.c