[RFC PATCH 0/4] rseq: Introduce extensible struct rseq

Recent discussion led to a solution for extending struct rseq. This is
an implementation of the proposed solution.

Now is a good time to agree on this scheme before the release of glibc
2.32, just in case there are small details to fix on the user-space
side in order to allow extending struct rseq.

Thanks,

Mathieu

Mathieu Desnoyers (4):
  selftests: rseq: Use fixed value as rseq_len parameter
  rseq: Allow extending struct rseq
  selftests: rseq: define __rseq_abi with extensible size
  selftests: rseq: print rseq extensible size in basic test

 include/linux/sched.h                     |  4 +++
 include/uapi/linux/rseq.h                 | 42 ++++++++++++++++++++--
 kernel/rseq.c                             | 44 +++++++++++++++++++----
 tools/testing/selftests/rseq/basic_test.c | 15 ++++++++
 tools/testing/selftests/rseq/rseq.c       |  8 +++--
 5 files changed, 101 insertions(+), 12 deletions(-)

-- 
2.17.1