Re: [PATCH bpf-next 0/2] bpf,ftrace: bpf dispatcher function fix

[Daniel Borkmann <daniel@xxxxxxxxxxxxx>]

On 8/26/22 8:46 PM, Jiri Olsa wrote:
> hi,
> as discussed [1] sending fix that moves bpf dispatcher function of out
> ftrace locations together with Peter's HAVE_DYNAMIC_FTRACE_NO_PATCHABLE
> dependency change.

Looks like the series breaks s390x builds; BPF CI link:

https://github.com/kernel-patches/bpf/runs/8079411784?check_suite_focus=true

  [...]
    CC      net/xfrm/xfrm_state.o
    CC      net/packet/af_packet.o
  {standard input}: Assembler messages:
  {standard input}:16055: Error: bad expression
  {standard input}:16056: Error: bad expression
  {standard input}:16057: Error: bad expression
  {standard input}:16058: Error: bad expression
  {standard input}:16059: Error: bad expression
    CC      drivers/s390/char/raw3270.o
    CC      net/ipv6/ip6_output.o
  [...]
    CC      net/xfrm/xfrm_output.o
    CC      net/ipv6/ip6_input.o
  {standard input}:16055: Error: invalid operands (*ABS* and *UND* sections) for `%'
  {standard input}:16056: Error: invalid operands (*ABS* and *UND* sections) for `%'
  {standard input}:16057: Error: invalid operands (*ABS* and *UND* sections) for `%'
  {standard input}:16058: Error: invalid operands (*ABS* and *UND* sections) for `%'
  {standard input}:16059: Error: invalid operands (*ABS* and *UND* sections) for `%'
  make[3]: *** [scripts/Makefile.build:249: net/core/filter.o] Error 1
  make[2]: *** [scripts/Makefile.build:465: net/core] Error 2
  make[2]: *** Waiting for unfinished jobs....
    CC      net/ipv4/tcp_fastopen.o
  [...]
    CC      lib/percpu-refcount.o
  make[1]: *** [Makefile:1855: net] Error 2
    CC      lib/rhashtable.o
  make[1]: *** Waiting for unfinished jobs....
    CC      lib/base64.o
  [...]
    AR      lib/built-in.a
    CC      kernel/kheaders.o
    AR      kernel/built-in.a
  make: *** [Makefile:353: __build_one_by_one] Error 2
  Error: Process completed with exit code 2.

> [1] https://lore.kernel.org/bpf/20220722110811.124515-1-jolsa@xxxxxxxxxx/
> ---
> Jiri Olsa (1):
>        bpf: Move bpf_dispatcher function out of ftrace locations
>
> Peter Zijlstra (Intel) (1):
>        ftrace: Add HAVE_DYNAMIC_FTRACE_NO_PATCHABLE
>
>   arch/x86/Kconfig                  |  1 +
>   include/asm-generic/vmlinux.lds.h | 11 ++++++++++-
>   include/linux/bpf.h               |  2 ++
>   kernel/trace/Kconfig              |  6 ++++++
>   tools/objtool/check.c             |  3 ++-
>   5 files changed, 21 insertions(+), 2 deletions(-)