linux-kernel - Re: [PATCH bpf-next v2 05/11] bpf, arm64, powerpc: Add bpf_jit_bypass_spec

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Message-ID: <87r01lzj9k.fsf@fau.de>
Date: Mon, 21 Apr 2025 16:22:47 +0200
From: Luis Gerhorst <luis.gerhorst@....de>
To: kernel test robot <lkp@...el.com>
Cc: Alexei Starovoitov <ast@...nel.org>,  Daniel Borkmann
 <daniel@...earbox.net>,  Andrii Nakryiko <andrii@...nel.org>,  Martin
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  Jiayuan Chen <mrpre@....com>,  Matan Shachnai <m.shachnai@...il.com>,
  oe-kbuild-all@...ts.linux.dev, bpf@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 linuxppc-dev@...ts.ozlabs.org, linux-kselftest@...r.kernel.org,
 henriette.herzog@....de
Subject: Re: [PATCH bpf-next v2 05/11] bpf, arm64, powerpc: Add
 bpf_jit_bypass_spec_v1/v4()

kernel test robot <lkp@...el.com> writes:

> All warnings (new ones prefixed by >>):
>
>>> kernel/bpf/core.c:3037:13: warning: no previous prototype for 'bpf_jit_bypass_spec_v1' [-Wmissing-prototypes]
>     3037 | bool __weak bpf_jit_bypass_spec_v1(void)
>          |             ^~~~~~~~~~~~~~~~~~~~~~
>>> kernel/bpf/core.c:3042:13: warning: no previous prototype for 'bpf_jit_bypass_spec_v4' [-Wmissing-prototypes]
>     3042 | bool __weak bpf_jit_bypass_spec_v4(void)
>          |             ^~~~~~~~~~~~~~~~~~~~~~

That's because the prototypes in include/linux/bpf.h were in the #ifdef
CONFIG_BPF_SYSCALL. I fixed this for v3 by moving the prototypes out of
the ifdef.