linux-kernel - Re: [PATCH] dump_stack: convert generic dump

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Message-ID: <20180307114845.GA894@jagdpanzerIV>
Date:   Wed, 7 Mar 2018 20:48:56 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Petr Mladek <pmladek@...e.com>, Tejun Heo <tj@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Dave Young <dyoung@...hat.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Greentime Hu <green.hu@...il.com>,
        Vincent Chen <deanbo422@...il.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        adi-buildroot-devel@...ts.sourceforge.net,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Subject: Re: [PATCH] dump_stack: convert generic dump_stack into a weak symbol

On (03/07/18 11:57), Arnd Bergmann wrote:
[..]
> >> Originally I planned to wait a few more releases, but the last maintainer
> >> has commented that he will now send a patch for immediate removal,
> >> so 4.17 is almost certain at this point.
> >
> > Would be great to get it removed as soon as possible then. Otherwise we
> > will get broken blackfin build errors from Stephen (or would need to hold
> > off Dave's patch).
> 
> You could also add a patch to your tree that removes the blackfin
> dump_stack() function, or we could ask Stephen and the other
> people operating build bots to stop building blackfin right now
> (they will have to do that anyway once the arch gets removed).

OK. Petr, Stephen, what would be your preference?

> Since lib/dump_stack.c is mandatory then, I would suggest making it
> obj-y and moving it out of lib/ into kernel/printk/.

Totally agree on obj-y. And tend to agree on moving lib/dump_stack to
kernel/printk. lib/dump_stack depends on CONFIG_PRINTK and is partially
in printk.h. So it _mostly_ seems like the right place after all.

	-ss