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From:   Linus Torvalds <torvalds@linux-foundation.org>
Date:   Sun, 19 Jul 2020 11:27:39 -0700
Message-ID: <CAHk-=wg70es2rSYsHbBcWrBPsoHmbZ8vmeqTS_Kypv6zHAwQjA@mail.gmail.com>
Subject: Re: [PATCH 2/4] printk: store instead of processing cont parts
To:     Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc:     John Ogness <john.ogness@linutronix.de>,
        Petr Mladek <pmladek@suse.com>,
        Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
        Steven Rostedt <rostedt@goodmis.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        kexec@lists.infradead.org,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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On Sun, Jul 19, 2020 at 7:35 AM Sergey Senozhatsky
<sergey.senozhatsky@gmail.com> wrote:
>
> Can we merge lines that we don't want to merge?
>
>    pr_cont()  ->  IRQ -> pr_cont() -> NMI -> pr_cont()

That pr_cont in either IRQ or NMI context would be a bug.

You can't validly have a PR_CONT without the non-cont that precedes it.

                Linus