bpf: Factor check_global_ret_scalar_reg() out of the global return check

check_global_subprog_return_code() verifies that a global subprogram
returns void, an arena pointer, or register R0 holding a scalar value.
Later patches in this series add 16-byte aggregate return support, whose
second half is returned in R2 and needs the same validation.

Factor the per-register check into check_global_ret_scalar_reg(env, regno)
so that it can be reused for R2. No functional change.

Signed-off-by: Yonghong Song <yonghong.song@linux.dev>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://patch.msgid.link/20260819055244.3294700-1-yonghong.song@linux.dev
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>

0 files changed, 0 insertions, 0 deletions