wireguard-linux/kernel/sched/ext/arena.c, branch stable

sched_ext: Pass kernel arena pointers to ops_cid callbacks

2026-08-12T19:55:33Z

The cid-form set_cmask() and sub_caps_updated() callbacks receive cmasks that the kernel builds in the arena, and the kernel converts the kernel addresses to the BPF arena pointer form by hand before each call. BPF now translates between BPF and kernel arena addresses for __arena arguments. Tag the arguments __arena in the cfi stubs and the ops_cid member declarations and pass the kernel arena addresses directly, dropping the manual scx_kaddr_to_arena() conversions and the now-unused helper. The delivered value is unchanged and existing BPF-side code works as before. The arena argument address translation is currently implemented only on x86-64. cid-form schedulers implementing these callbacks load only there for now. Signed-off-by: Tejun Heo

sched_ext: Convert scx_arena_grow() to use scx_arena_to_kaddr()

2026-06-25T20:16:30Z

scx_arena_grow() was left open-coded when 2e05f2fd0dd7 ("sched_ext: Add scx_arena_to_kaddr() / scx_kaddr_to_arena()") introduced the helper. Replace the manual bpf_arena_map_kern_vm_start() fetch and #ifdef guard with scx_arena_to_kaddr(sch, p). Signed-off-by: Cheng-Yang Chou Signed-off-by: Tejun Heo

sched_ext: Make kernel/sched/ext/ sources self-contained for clangd

2026-06-22T20:41:26Z

The sources under kernel/sched/ext/ build as a single translation unit: build_policy.c includes the source files and headers. An LSP/clangd editor parses each as a standalone unit, sees no types, and reports a flood of errors. Give each header its dependencies and include guard, and have each source include the headers it uses. ext.c, arena.c and the ext headers now parse clean standalone. idle.c and cid.c still reference a few macros and helpers defined in ext.c. The next patch moves those to shared headers. Suggested-by: Peter Zijlstra Signed-off-by: Tejun Heo Reviewed-by: Andrea Righi

sched_ext: Move sources under kernel/sched/ext/

2026-06-22T15:32:56Z

The sched_ext sources had grown to ten ext* files directly under kernel/sched/. Move them into a new kernel/sched/ext/ subdirectory and drop the now-redundant ext_ prefix. ext.c/h keep their names. kernel/sched/ext.{c,h} -> kernel/sched/ext/ext.{c,h} kernel/sched/ext_internal.h -> kernel/sched/ext/internal.h kernel/sched/ext_types.h -> kernel/sched/ext/types.h kernel/sched/ext_idle.{c,h} -> kernel/sched/ext/idle.{c,h} kernel/sched/ext_cid.{c,h} -> kernel/sched/ext/cid.{c,h} kernel/sched/ext_arena.{c,h} -> kernel/sched/ext/arena.{c,h} The include paths in build_policy.c and sched.h, the MAINTAINERS glob, and a few documentation and comment references are updated to match. No code or symbol changes. Suggested-by: Linus Torvalds Reviewed-by: Andrea Righi Signed-off-by: Tejun Heo