Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Mon, 14 Oct 2019 04:35:01 -0500
From:   Segher Boessenkool <segher@kernel.crashing.org>
To:     Nathan Chancellor <natechancellor@gmail.com>
Cc:     Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>,
        Michael Ellerman <mpe@ellerman.id.au>,
        clang-built-linux@googlegroups.com,
        Nick Desaulniers <ndesaulniers@google.com>,
        linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 3/3] powerpc/prom_init: Use -ffreestanding to avoid a reference to bcmp
Message-ID: <20191014093501.GE28442@gate.crashing.org>
References: <20190911182049.77853-1-natechancellor@gmail.com> <20191014025101.18567-1-natechancellor@gmail.com> <20191014025101.18567-4-natechancellor@gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20191014025101.18567-4-natechancellor@gmail.com>
User-Agent: Mutt/1.4.2.3i
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Sun, Oct 13, 2019 at 07:51:01PM -0700, Nathan Chancellor wrote:
> r374662 gives LLVM the ability to convert certain loops into a reference
> to bcmp as an optimization; this breaks prom_init_check.sh:

When/why does LLVM think this is okay?  This function has been removed
from POSIX over a decade ago (and before that it always was marked as
legacy).


Segher