sched_ext: Work around pahole 1.32 dropping scx_bpf_task_set_lazy_resched() from BTF

With clang and pahole 1.32, x86-64 vmlinux BTF lacks
scx_bpf_task_set_lazy_resched() and sched_ext fails to initialize:

  sched_ext: Failed to register kfunc sets (-22)

clang describes the lazy argument only after the prologue moves it into a
callee-saved register, which pahole 1.32 rejects as not being the argument
register. Released pahole is affected whatever the eventual fix. Keep the
argument on the stack with barrier_data() so that its location names no
register. OPTIMIZER_HIDE_VAR() would fix x86-64 but break arm64.

Fixes: f8e5a4e3f3be ("sched_ext: Add lazy preemption support")
Link: https://lore.kernel.org/r/20260925213619.2187751-1-yonghong.song@linux.dev
Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Andrea Righi <arighi@nvidia.com>

0 files changed, 0 insertions, 0 deletions