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Date:   Mon, 21 Mar 2022 13:55:49 +0100
From:   Peter Zijlstra <peterz@infradead.org>
To:     Stephen Rothwell <sfr@canb.auug.org.au>
Cc:     Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux Next Mailing List <linux-next@vger.kernel.org>
Subject: Re: linux-next: build warnings after merge of the tip tree
Message-ID: <Yjh11UjDZogc3foM@hirez.programming.kicks-ass.net>
References: <20220321140327.777f9554@canb.auug.org.au>
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On Mon, Mar 21, 2022 at 02:03:27PM +1100, Stephen Rothwell wrote:
> Hi all,
>=20
> After merging the tip tree, today's linux-next build (x864 allmodconfig)
> produced these new warnings:
>=20
> vmlinux.o: warning: objtool: arch_rethook_prepare()+0x55: relocation to !=
ENDBR: arch_rethook_trampoline+0x0
> vmlinux.o: warning: objtool: arch_rethook_trampoline_callback()+0x3e: rel=
ocation to !ENDBR: arch_rethook_trampoline+0x0
> vmlinux.o: warning: objtool: unwind_next_frame()+0x93e: relocation to !EN=
DBR: arch_rethook_trampoline+0x0
> vmlinux.o: warning: objtool: unwind_next_frame()+0x5f2: relocation to !EN=
DBR: arch_rethook_trampoline+0x0
> vmlinux.o: warning: objtool: unwind_next_frame()+0x4a7: relocation to !EN=
DBR: arch_rethook_trampoline+0x0
> vmlinux.o: warning: objtool: __rethook_find_ret_addr()+0x81: relocation t=
o !ENDBR: arch_rethook_trampoline+0x0
> vmlinux.o: warning: objtool: __rethook_find_ret_addr()+0x90: relocation t=
o !ENDBR: arch_rethook_trampoline+0x0
> vmlinux.o: warning: objtool: rethook_trampoline_handler()+0x8c: relocatio=
n to !ENDBR: arch_rethook_trampoline+0x0
> vmlinux.o: warning: objtool: rethook_trampoline_handler()+0x9b: relocatio=
n to !ENDBR: arch_rethook_trampoline+0x0

Hurmph, lemme go figure out where that code comes from, I've not seen
those.

> [ Note I was already getting these:
> arch/x86/crypto/chacha-x86_64.o: warning: objtool: chacha_2block_xor_avx5=
12vl() falls through to next function chacha_8block_xor_avx512vl()
> arch/x86/crypto/chacha-x86_64.o: warning: objtool: chacha_4block_xor_avx5=
12vl() falls through to next function chacha_8block_xor_avx512vl()
> arch/x86/crypto/poly1305-x86_64.o: warning: objtool: poly1305_blocks_avx(=
) falls through to next function poly1305_blocks_x86_64()
> arch/x86/crypto/poly1305-x86_64.o: warning: objtool: poly1305_emit_avx() =
falls through to next function poly1305_emit_x86_64()
> arch/x86/crypto/poly1305-x86_64.o: warning: objtool: poly1305_blocks_avx2=
() falls through to next function poly1305_blocks_x86_64()

Yes, those are somewhere on the todo list, lemme bump them.