bpf: Drop the recursion depth argument of btf_type_is_scalar_struct()

btf_type_is_scalar_struct() recurses into nested struct members and
carries the nesting depth in a @rec argument, so every caller has to
spell out the 0 that starts the walk.

Move the recursion into btf_struct_member_walk() and leave
btf_type_is_scalar_struct() as a thin wrapper over it. This is
groundwork for the later patches, which give the walk further state
that callers should not have to supply: the kinds of member it accepts,
and a record of the member that made it fail.

No functional change.

Signed-off-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20260829061524.1692957-1-yonghong.song@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

0 files changed, 0 insertions, 0 deletions