netdev - Linux 6.1-rc3 build fail in include/linux/bpf.h

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Message-ID: <439d8dc735bb4858875377df67f1b29a@AcuMS.aculab.com>
Date:   Mon, 31 Oct 2022 11:14:31 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     Jiri Olsa <jolsa@...nel.org>
Subject: Linux 6.1-rc3 build fail in include/linux/bpf.h

The 6.1-rc3 sources fail to build because bpf.h unconditionally
#define BPF_DISPATCHER_ATTRIBUTES __attribute__((patchable_function_entry(5)))
for X86_64 builds.

I'm pretty sure that should depend on some other options
since the compiler isn't required to support it.
(The gcc 7.5.0 on my Ubunti 18.04 system certainly doesn't)

The only other reference to that attribute is in the definition
of 'notrace' in compiler.h.

	David

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