linux-kernel - Re: [PATCH v2 2/5] ARM: vdso: Don't use gcc plugins for building vgettimeofday.c

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Message-ID: <20200624125236.GF4332@42.do-not-panic.com>
Date:   Wed, 24 Jun 2020 12:52:36 +0000
From:   Luis Chamberlain <mcgrof@...nel.org>
To:     Alexander Popov <alex.popov@...ux.com>
Cc:     Kees Cook <keescook@...omium.org>, Jann Horn <jannh@...gle.com>,
        Emese Revfy <re.emese@...il.com>,
        Miguel Ojeda <miguel.ojeda.sandonis@...il.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Thiago Jung Bauermann <bauerman@...ux.ibm.com>,
        Jessica Yu <jeyu@...nel.org>,
        Sven Schnelle <svens@...ckframe.org>,
        Iurii Zaikin <yzaikin@...gle.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Collingbourne <pcc@...gle.com>,
        Naohiro Aota <naohiro.aota@....com>,
        Alexander Monakov <amonakov@...ras.ru>,
        Mathias Krause <minipli@...glemail.com>,
        PaX Team <pageexec@...email.hu>,
        Brad Spengler <spender@...ecurity.net>,
        Laura Abbott <labbott@...hat.com>,
        Florian Weimer <fweimer@...hat.com>,
        kernel-hardening@...ts.openwall.com, linux-kbuild@...r.kernel.org,
        x86@...nel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, gcc@....gnu.org, notify@...nel.org
Subject: Re: [PATCH v2 2/5] ARM: vdso: Don't use gcc plugins for building
 vgettimeofday.c

On Wed, Jun 24, 2020 at 03:33:27PM +0300, Alexander Popov wrote:
> Don't use gcc plugins for building arch/arm/vdso/vgettimeofday.c to
> avoid unneeded instrumentation.
> 
> Signed-off-by: Alexander Popov <alex.popov@...ux.com>

But why is skipping it safe?

  Luis