The patch titled
Subject: panic-add-an-option-to-replay-all-the-printk-message-in-buffer-v5
has been added to the -mm tree. Its filename is
panic-add-an-option-to-replay-all-the-printk-message-in-buffer-v5.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/panic-add-an-option-to-replay-all-the-printk-message-in-buffer-v5.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/panic-add-an-option-to-replay-all-the-printk-message-in-buffer-v5.patch
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------------------------------------------------------
From: Feng Tang <feng.tang@xxxxxxxxx>
Subject: panic-add-an-option-to-replay-all-the-printk-message-in-buffer-v5
Use logbuf lock to protect the console log index changing, suggested by
Petr Mladek.
Link: http://lkml.kernel.org/r/1556269868-22654-1-git-send-email-feng.tang@xxxxxxxxx
Signed-off-by: Feng Tang <feng.tang@xxxxxxxxx>
Reviewed-by: Petr Mladek <pmladek@xxxxxxxx>
Cc: Aaro Koskinen <aaro.koskinen@xxxxxxxxx>
Cc: Petr Mladek <pmladek@xxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@xxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/printk/printk.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/kernel/printk/printk.c~panic-add-an-option-to-replay-all-the-printk-message-in-buffer-v5
+++ a/kernel/printk/printk.c
@@ -2552,8 +2552,12 @@ void console_flush_on_panic(enum con_flu
console_may_schedule = 0;
if (mode == CONSOLE_REPLAY_ALL) {
+ unsigned long flags;
+
+ logbuf_lock_irqsave(flags);
console_seq = log_first_seq;
console_idx = log_first_idx;
+ logbuf_unlock_irqrestore(flags);
}
console_unlock();
}
_
Patches currently in -mm which might be from feng.tang@xxxxxxxxx are
panic-avoid-the-extra-noise-dmesg.patch
panic-add-an-option-to-replay-all-the-printk-message-in-buffer.patch
panic-add-an-option-to-replay-all-the-printk-message-in-buffer-v4.patch
panic-add-an-option-to-replay-all-the-printk-message-in-buffer-v5.patch
