[PATCHSET sched_ext/for-7.5] sched_ext: Sync tools headers with scx and fix unsigned enum reads

[Tejun Heo]

Hello,

This patchset fixes __COMPAT_read_enum() sign-extending unsigned 4-byte
enums, which made SCX_RESCUE_DISABLE read as 0xffffffffffffffff, syncs the
shared headers in tools/sched_ext/include with the scx repo, and drops the
enum lookup table entries for enumerators the kernel no longer has. The scx
side is https://github.com/sched-ext/scx/pull/3930, merged, and
https://github.com/sched-ext/scx/pull/3932.

With both applied, the shared headers in tools/sched_ext/include are
identical to scx's except the two generated tables, enum_defs.autogen.h and
enums_abi.autogen.h, which each side regenerates from its own vmlinux.h.

Based on sched_ext/for-7.5 (dd3b1d9be27c).

This patchset contains the following 4 patches.

 0001 sched_ext: Don't sign-extend unsigned enums in __COMPAT_read_enum()
 0002 sched_ext: Sync tools autogen enum lookup tables from the scx repo
 0003 sched_ext: Sync common and compat headers from the scx repo
 0004 sched_ext: Drop stale entries from the enum lookup tables

The patchset is also available in the following git branch:

 git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext.git enums-sync

diffstat follows. Thanks.

 tools/sched_ext/include/scx/bpf_arena_common.bpf.h | 23 +++++++++++++++++++++-
 tools/sched_ext/include/scx/common.bpf.h           |  9 +++++++++
 tools/sched_ext/include/scx/compat.bpf.h           | 16 +++++++--------
 tools/sched_ext/include/scx/compat.h               |  6 +++++-
 tools/sched_ext/include/scx/enums.autogen.bpf.h    | 18 +++--------------
 tools/sched_ext/include/scx/enums.autogen.h        |  6 +-----
 tools/sched_ext/scx_flatcg.bpf.c                   |  5 -----
 7 files changed, 48 insertions(+), 35 deletions(-)

--
tejun