From: Marcin Nowakowski <marcin.nowakowski@imgtec.com>
To: Nicholas Piggin <npiggin@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>, <linux-kernel@vger.kernel.org>,
Michal Marek <mmarek@suse.com>
Subject: Re: [PATCH RESEND 0/2] kbuild: dead code elimination: ftrace fixes
Date: Thu, 22 Dec 2016 10:15:13 +0100 [thread overview]
Message-ID: <6ea6505b-be41-1cd6-2fb2-63a58f1ac727@imgtec.com> (raw)
In-Reply-To: <20161222190854.6604e386@roar.ozlabs.ibm.com>
Hi Nick,
On 22.12.2016 10:08, Nicholas Piggin wrote:
> On Thu, 22 Dec 2016 09:51:45 +0100
> Marcin Nowakowski <marcin.nowakowski@imgtec.com> wrote:
>
>> Enabling dead code & data elimination currently breaks ftrace operation,
>> as the __mcount_loc section is removed (as it is not referenced directly
>> anywhere in the code).
>> Moreover, there are a lot of entries missing in the __mcount_loc section
>> as the recordmcount tool doesn't currently properly handle the section
>> names as created by the use of -ffunction-sections.
>
> Thanks for keeping on top of these. I didn't have any objections, so
> if you would send them to Michal Marek for merge and cc linux-kbuild
> that would be appreciated.
I had previously sent them to Michal and cc:kbuild, but Michal has not
picked them up yet hence I've sent them to lkml now.
It's not clear to me if Michal is the person responsible for
recordmcount changes, but I initially posted this to kbuild as this is
where all of your dead code & data elimination patches were going through.
Michal - do you plan to pick up these changes or would they need to be
acked/merged by somebody else?
thanks,
Marcin
prev parent reply other threads:[~2016-12-22 9:15 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-22 8:51 Marcin Nowakowski
2016-12-22 8:51 ` [PATCH 1/2] kbuild: keep __mcount_loc table through dead code elimination Marcin Nowakowski
2016-12-22 8:51 ` [PATCH 2/2] recordmcount: fix mcount recording with -ffunction-sections Marcin Nowakowski
2016-12-22 9:08 ` [PATCH RESEND 0/2] kbuild: dead code elimination: ftrace fixes Nicholas Piggin
2016-12-22 9:15 ` Marcin Nowakowski [this message]
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