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Date:   Mon, 31 Oct 2022 13:17:16 +0100
From:   Jiri Olsa <>
To:     David Laight <>
Cc:     "" <>,
        "" <>,
        Peter Zijlstra <>
Subject: Re: Linux 6.1-rc3 build fail in include/linux/bpf.h

On Mon, Oct 31, 2022 at 11:14:31AM +0000, David Laight wrote:
> 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.

I guess we need to make some __has_attribute check and make all that conditional

cc-ing Peter


> 	David
> -
> Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
> Registration No: 1397386 (Wales)

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