[patch V2 00/20] bpf: Make BPF and PREEMPT_RT co-exist

[Thomas Gleixner]

Hi!

This is the second version of the BPF/RT patch set which makes both coexist
nicely. The long explanation can be found in the cover letter of the V1
submission:

  https://lore.kernel.org/r/20200214133917.304937432@xxxxxxxxxxxxx

The following changes vs. V1 have been made:

  - New patch to enforce preallocation for all instrumentation type
    programs

  - New patches which make the recursion protection safe against preemption
    on RT (Mathieu)

  - New patch which removes the unnecessary recursion protection around
    the rcu_free() invocation

  - Converted macro to inline (Mathieu)

  - Added explanation about the seccomp loop to the changelog (Vinicius)

  - Fixed the explicitely typos (Jakub)

  - Dropped the migrate* stubs patches and merged them into the tip
    tree. See below.

The series applies on top of:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched-for-bpf-2020-02-20

This tag contains only the two migrate stub commits on top of 5.6-rc2 and
can be pulled into BPF. The commits are immutable and will be carried also
in tip so further changes in this area can be applied.

Thanks,

	tglx

---
 include/linux/bpf.h          |   38 ++++++++-
 include/linux/filter.h       |   33 ++++++--
 kernel/bpf/hashtab.c         |  172 ++++++++++++++++++++++++++++++-------------
 kernel/bpf/lpm_trie.c        |   12 +--
 kernel/bpf/percpu_freelist.c |   20 ++---
 kernel/bpf/stackmap.c        |   18 +++-
 kernel/bpf/syscall.c         |   27 ++----
 kernel/bpf/trampoline.c      |    9 +-
 kernel/bpf/verifier.c        |   18 ++--
 kernel/events/core.c         |    2 
 kernel/seccomp.c             |    4 -
 kernel/trace/bpf_trace.c     |    6 -
 lib/test_bpf.c               |    4 -
 net/bpf/test_run.c           |    8 +-
 net/core/flow_dissector.c    |    4 -
 net/core/skmsg.c             |    8 --
 net/kcm/kcmsock.c            |    4 -
 17 files changed, 252 insertions(+), 135 deletions(-)