On 6/30/16, Andreas Ziegler [off-list ref] wrote:

Hi Naveen,

this patchset makes a change to arch/powerpc/net/Makefile in order to only
compile the previously existing bpf_jit_comp.c if !CONFIG_PPC64, and use
bpf_jit_comp64.c if CONFIG_PPC64 is enabled.

Inside arch/powerpc/net/bpf_jit_comp.c, however, there is still an #ifdef
CONFIG_PPC64 block at line 667 (linux-next of today, i.e., next-20160630):

  #ifdef CONFIG_PPC64
                  /* Function descriptor nastiness: Address + TOC */
                  ((u64 *)image)[0] = (u64)code_base;
                  ((u64 *)image)[1] = local_paca->kernel_toc;
  #endif

From my understanding of the code, this #ifdef can now be removed, as there
is
no way the file could be compiled with CONFIG_PPC64 enabled. Is this
correct?

That was used for running classic BPF on ppc64. With eBPF on ppc64 the
whole block can be removed.

Best regards,

Andreas
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