linux-kernel - Re: [PATCH 3.16 23/99] tty/ldsem: Wake up readers after timed out down

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Date:   Tue, 02 Apr 2019 15:32:49 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     Dmitry Safonov <0x7f454c46@...il.com>
Cc:     open list <linux-kernel@...r.kernel.org>,
        stable <stable@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Denis Kirjanov <kda@...ux-powerpc.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>,
        kernel test robot <rong.a.chen@...el.com>,
        Dmitry Safonov <dima@...sta.com>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH 3.16 23/99] tty/ldsem: Wake up readers after timed out
 down_write()

On Tue, 2019-04-02 at 15:22 +0100, Dmitry Safonov wrote:
> Hi Ben,
> 
> JFI: I haven't checked your tree, but the same patches set contains fixes
> that are more important to my mind (looking at 4.9 stable tree):
> - "tty: Drop tty->count on tty_reopen() failure" commit fe3241679009

You marked this as applicable to 4.6+.  Is it actually applicable to
older versions as well?

> - "tty: Hold tty_ldisc_lock() during tty_reopen()" commit 83d817f41070
>   with follow-up fixup "tty: Don't hold ldisc lock in tty_reopen() if
> ldisc present"
>   commit d3736d82e816
[...]

I will include these in a later update, unless you think they are
really urgent and should be added to this one.

Ben.

-- 
Ben Hutchings
Klipstein's 4th Law of Prototyping and Production:
                               A fail-safe circuit will destroy others.



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