Re: [PATCH 5.4 49/52] powerpc/bpf: Fix BPF_MOD when imm == 1

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stable-rc 5.4 build failed due this patch.
 - powerpc gcc-10-defconfig - FAILED
 - powerpc gcc-11-defconfig - FAILED
 - powerpc gcc-8-defconfig - FAILED
 - powerpc gcc-9-defconfig - FAILED


On Mon, 11 Oct 2021 at 19:28, Greg Kroah-Hartman
<gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
>
> From: Naveen N. Rao <naveen.n.rao@xxxxxxxxxxxxxxxxxx>
>
> [ Upstream commit 8bbc9d822421d9ac8ff9ed26a3713c9afc69d6c8 ]
>
> Only ignore the operation if dividing by 1.

<trim>

In file included from arch/powerpc/net/bpf_jit64.h:11,
                 from arch/powerpc/net/bpf_jit_comp64.c:19:
arch/powerpc/net/bpf_jit_comp64.c: In function 'bpf_jit_build_body':
arch/powerpc/net/bpf_jit_comp64.c:415:46: error: implicit declaration
of function 'PPC_RAW_LI'; did you mean 'PPC_RLWIMI'?
[-Werror=implicit-function-declaration]
  415 |                                         EMIT(PPC_RAW_LI(dst_reg, 0));
      |                                              ^~~~~~~~~~
arch/powerpc/net/bpf_jit.h:32:34: note: in definition of macro 'PLANT_INSTR'
   32 |         do { if (d) { (d)[idx] = instr; } idx++; } while (0)
      |                                  ^~~~~
arch/powerpc/net/bpf_jit_comp64.c:415:41: note: in expansion of macro 'EMIT'
  415 |                                         EMIT(PPC_RAW_LI(dst_reg, 0));
      |                                         ^~~~
cc1: all warnings being treated as errors

Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>

--
Linaro LKFT
https://lkft.linaro.org
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