linux-kernel - Re: [PATCH v1 tip/master 1/3] retpoline: Introduce start/end markers of indirect thunk

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Message-Id: <20180119003443.a58188a04552897d7fb78dbc@kernel.org>
Date:   Fri, 19 Jan 2018 00:34:43 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     "Woodhouse, David" <dwmw@...zon.co.uk>
Cc:     mhiramat@...nel.org, "mingo@...nel.org" <mingo@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "arjan@...ux.intel.com" <arjan@...ux.intel.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "ak@...ux.intel.com" <ak@...ux.intel.com>,
        "hpa@...or.com" <hpa@...or.com>,
        "ananth@...ux.vnet.ibm.com" <ananth@...ux.vnet.ibm.com>,
        "gregkh@...ux-foundation.org" <gregkh@...ux-foundation.org>
Subject: Re: [PATCH v1 tip/master 1/3] retpoline: Introduce start/end
 markers of indirect thunk

On Thu, 18 Jan 2018 12:06:10 +0000
"Woodhouse, David" <dwmw@...zon.co.uk> wrote:

> On Thu, 2018-01-18 at 21:01 +0900, Masami Hiramatsu wrote:
> > 
> > +#define X86_INDIRECT_THUNK(reg)        \
> > +               *(.text.__x86.indirect_thunk.##reg)
> 
> Note that we don't actually care about those being in their own
> section, named after the register. That was just a hangover from the
> initial GCC COMDAT implementation.
> 
> If it makes your life easier just to put them all in a single section,
> go ahead.

Got it. I just concerned that gcc was using this section. 
I'll make it ".text.__x86.indirect_thunk" to consolidate.

Thanks!

-- 
Masami Hiramatsu <mhiramat@...nel.org>