[PATCH bpf-next 0/3] s390/bpf: Use kernel's expoline thunks

[Ilya Leoshkevich <iii@linux.ibm.com>]

Hi,

This series simplifies the s390 JIT by replacing the generation of
expolines (Spectre mitigation) with using the ones from the kernel
text. This is possible thanks to the V!=R s390 kernel rework.
Patch 1 is a small prerequisite for arch/s390 that I would like to
get in via the BPF tree. It has Heiko's Acked-by.
Patches 2 and 3 are the implementation.

Best regards,
Ilya

Ilya Leoshkevich (3):
  s390: always declare expoline thunks
  s390/bpf: Add macros for calling external functions
  s390/bpf: Use kernel's expoline thunks

 arch/s390/include/asm/nospec-branch.h |   4 -
 arch/s390/net/bpf_jit_comp.c          | 121 +++++++++++++-------------
 2 files changed, 59 insertions(+), 66 deletions(-)

-- 
2.49.0