Re: [PATCH] bpf: Tweak BPF jump table optimizations for objtool compatibility

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Subject: Re: [PATCH] bpf: Tweak BPF jump table optimizations for objtool compatibility
From: Alexei Starovoitov <alexei.starovoitov@xxxxxxxxx>
Date: Tue, 5 May 2020 12:14:05 -0700
Cc: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>, Alexei Starovoitov <ast@xxxxxxxxxx>, Daniel Borkmann <daniel@xxxxxxxxxxxxx>, netdev@xxxxxxxxxxxxxxx, bpf@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, x86@xxxxxxxxxx, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Arnd Bergmann <arnd@xxxxxxxx>
In-reply-to: <89101da0-20e4-a29f-9796-870aa4d328a6@infradead.org>

> 
> Hi,
> 
> I see the objtool warning:
> kernel/bpf/core.o: warning: objtool: ___bpf_prog_run()+0x33: call without frame pointer save/setup
> 
> when using:
> gcc (SUSE Linux) 9.3.1 20200406 [revision 6db837a5288ee3ca5ec504fbd5a765817e556ac2]
> 
> with the attached config file.

Thanks Randy. I reproduced it.

Follow-Ups:
- Re: [PATCH] bpf: Tweak BPF jump table optimizations for objtool compatibility
  - From: Josh Poimboeuf

References:
- [PATCH] bpf: Tweak BPF jump table optimizations for objtool compatibility
  - From: Josh Poimboeuf
- Re: [PATCH] bpf: Tweak BPF jump table optimizations for objtool compatibility
  - From: Alexei Starovoitov
- Re: [PATCH] bpf: Tweak BPF jump table optimizations for objtool compatibility
  - From: Josh Poimboeuf
- Re: [PATCH] bpf: Tweak BPF jump table optimizations for objtool compatibility
  - From: Alexei Starovoitov
- Re: [PATCH] bpf: Tweak BPF jump table optimizations for objtool compatibility
  - From: Josh Poimboeuf
- Re: [PATCH] bpf: Tweak BPF jump table optimizations for objtool compatibility
  - From: Alexei Starovoitov
- Re: [PATCH] bpf: Tweak BPF jump table optimizations for objtool compatibility
  - From: Josh Poimboeuf
- Re: [PATCH] bpf: Tweak BPF jump table optimizations for objtool compatibility
  - From: Alexei Starovoitov

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