linux-kernel - Re: [PATCH 2/4] swait: add the missing killable swaits

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Message-ID: <20170629172921.GM21846@wotan.suse.de>
Date:   Thu, 29 Jun 2017 19:29:21 +0200
From:   "Luis R. Rodriguez" <mcgrof@...nel.org>
To:     Matthew Wilcox <mawilcox@...rosoft.com>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Greg KH <gregkh@...uxfoundation.org>,
        "Luis R. Rodriguez" <mcgrof@...nel.org>,
        "mfuzzey@...keon.com" <mfuzzey@...keon.com>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Daniel Wagner <wagi@...om.org>,
        David Woodhouse <dwmw2@...radead.org>,
        "jewalt@...innovations.com" <jewalt@...innovations.com>,
        "rafal@...ecki.pl" <rafal@...ecki.pl>,
        Arend Van Spriel <arend.vanspriel@...adcom.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        "Li, Yi" <yi1.li@...ux.intel.com>,
        "atull@...nel.org" <atull@...nel.org>,
        Moritz Fischer <moritz.fischer@...us.com>,
        Petr Mladek <pmladek@...e.com>,
        Johannes Berg <johannes.berg@...el.com>,
        Emmanuel Grumbach <emmanuel.grumbach@...el.com>,
        "Coelho, Luciano" <luciano.coelho@...el.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        Andrew Lutomirski <luto@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        "AKASHI, Takahiro" <takahiro.akashi@...aro.org>,
        David Howells <dhowells@...hat.com>,
        Peter Jones <pjones@...hat.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Alan Cox <alan@...ux.intel.com>, Theodore Ts'o <tytso@....edu>,
        Michael Kerrisk <mtk.manpages@...il.com>,
        Paul Gortmaker <paul.gortmaker@...driver.com>,
        Marcelo Tosatti <mtosatti@...hat.com>,
        Linux API <linux-api@...r.kernel.org>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "stable # 4 . 6" <stable@...r.kernel.org>
Subject: Re: [PATCH 2/4] swait: add the missing killable swaits

On Thu, Jun 29, 2017 at 04:31:08PM +0000, Matthew Wilcox wrote:
> Linus Torvalds wrote:
> > The thing is simply a collection of small hacks and should NOT be used
> > in general.
> > 
> > I never want to see a driver use that code, for example. It was
> > designed for RCU and RT, and it should damn well be limited to that.
> 
> Maybe put #ifndef MODULE around the entire include file then?
> And definitely remove this line:
> 
> * One would recommend using this wait queue where possible.

I'll respin and port away from swait, and add the #ifndef MODULE and special
note on swait.h.

  Luis