the issue being targeted here is that sched.h is entirely too much of an everything header, and a nexus of recursive header dependencies. the main strategy is to try to only pull type definitions into sched.h, by splitting out *_types.h versions of sched.h dependencies, and secondarily moving code out of sched.h into more appropriate locations. this patchset does not go quite as far as I would have liked; arch/x86/include/asm/processor.h also pulls in way too much, and I would like to also split out a _types.h version for that, but that would entail changing every arch's version of that header and I'm not going to tackle that yet. if we do get that done, the number of headers pulled in by sched.h will be cut approximately in half (from well over 300 to 170-180) on an allyesconfig. build tested on x86, still needs build testing on other archs https://evilpiepirate.org/git/bcachefs.git/log/?h=header_cleanup Kent Overstreet (49): drivers/gpu/drm/i915/i915_memcpy.c: fix missing includes x86/kernel/fpu/bugs.c: fix missing include x86/lib/cache-smp.c: fix missing include x86/include/asm/debugreg.h: fix missing include x86/include/asm/paravirt_types.h: fix missing include task_stack.h: add missing include nsproxy.h: add missing include kernel/fork.c: add missing include kmsan: add missing types.h dependency time_namespace.h: fix missing include nodemask: Split out include/linux/nodemask_types.h prandom: Remove unused include timekeeping: Kill percpu.h dependency arm64: Fix circular header dependency kernel/numa.c: Move logging out of numa.h sched.h: Move (spin|rwlock)_needbreak() to spinlock.h ktime.h: move ktime_t to types.h hrtimers: Split out hrtimer_types.h locking/mutex: split out mutex_types.h posix-cpu-timers: Split out posix-timers_types.h locking/seqlock: Split out seqlock_types.h pid: Split out pid_types.h sched.h: move pid helpers to pid.h plist: Split out plist_types.h rslib: kill bogus dependency on list.h timerqueue: Split out timerqueue_types.h signal: Kill bogus dependency on list.h timers: Split out timer_types.h workqueue: Split out workqueue_types.h shm: Slim down dependencies ipc: Kill bogus dependency on spinlock.h Split out irqflags_types.h mm_types_task.h: Trim dependencies cpumask: Split out cpumask_types.h syscall_user_dispatch.h: split out *_types.h x86/signal: kill dependency on time.h uapi/linux/resource.h: fix include refcount: Split out refcount_types.h seccomp: Split out seccomp_types.h uidgid: Split out uidgid_types.h sem: Split out sem_types.h lockdep: move held_lock to lockdep_types.h restart_block: Trim includes rseq: Split out rseq.h from sched.h preempt.h: Kill dependency on list.h thread_info, uaccess.h: Move HARDENED_USERCOPY to better location Kill unnecessary kernel.h include kill unnecessary thread_info.h include Kill sched.h dependency on rcupdate.h Matthew Wilcox (Oracle) (1): wait: Remove uapi header file from main header file arch/arm64/include/asm/spectre.h | 4 +- arch/x86/include/asm/current.h | 1 + arch/x86/include/asm/debugreg.h | 1 + arch/x86/include/asm/fpu/types.h | 2 + arch/x86/include/asm/paravirt_types.h | 2 + arch/x86/include/asm/percpu.h | 2 +- arch/x86/include/asm/preempt.h | 1 - arch/x86/include/asm/tlbbatch.h | 2 +- arch/x86/include/uapi/asm/signal.h | 1 - arch/x86/kernel/fpu/bugs.c | 1 + arch/x86/kernel/signal.c | 1 + arch/x86/lib/cache-smp.c | 1 + drivers/gpu/drm/i915/i915_memcpy.c | 2 + drivers/target/target_core_xcopy.c | 1 + fs/exec.c | 1 + include/linux/audit.h | 1 + include/linux/cpumask.h | 4 +- include/linux/cpumask_types.h | 12 + include/linux/dma-fence.h | 1 + include/linux/hrtimer.h | 46 +-- include/linux/hrtimer_types.h | 50 +++ include/linux/ipc.h | 2 +- include/linux/irqflags.h | 14 +- include/linux/irqflags_types.h | 22 ++ include/linux/kmsan_types.h | 2 + include/linux/ktime.h | 8 +- include/linux/lockdep.h | 57 ---- include/linux/lockdep_types.h | 57 ++++ include/linux/mm_types_task.h | 7 +- include/linux/mutex.h | 52 +--- include/linux/mutex_types.h | 71 +++++ include/linux/nodemask.h | 2 +- include/linux/nodemask_types.h | 10 + include/linux/nsproxy.h | 1 + include/linux/numa.h | 18 +- include/linux/pid.h | 140 ++++++++- include/linux/pid_types.h | 16 + include/linux/plist.h | 12 +- include/linux/plist_types.h | 17 ++ include/linux/posix-timers.h | 68 +---- include/linux/posix-timers_types.h | 72 +++++ include/linux/prandom.h | 1 - include/linux/preempt.h | 6 +- include/linux/rcupdate.h | 11 + include/linux/refcount.h | 13 +- include/linux/refcount_types.h | 19 ++ include/linux/restart_block.h | 2 +- include/linux/resume_user_mode.h | 1 + include/linux/rhashtable-types.h | 2 +- include/linux/rseq.h | 131 ++++++++ include/linux/rslib.h | 1 - include/linux/sched.h | 320 ++------------------ include/linux/sched/signal.h | 1 + include/linux/sched/task_stack.h | 1 + include/linux/seccomp.h | 22 +- include/linux/seccomp_types.h | 26 ++ include/linux/sem.h | 10 +- include/linux/sem_types.h | 13 + include/linux/seqlock.h | 79 +---- include/linux/seqlock_types.h | 93 ++++++ include/linux/shm.h | 4 +- include/linux/signal.h | 1 + include/linux/signal_types.h | 2 +- include/linux/spinlock.h | 31 ++ include/linux/syscall_user_dispatch.h | 9 +- include/linux/syscall_user_dispatch_types.h | 22 ++ include/linux/thread_info.h | 49 --- include/linux/time_namespace.h | 3 + include/linux/timekeeping.h | 1 + include/linux/timer.h | 16 +- include/linux/timer_types.h | 23 ++ include/linux/timerqueue.h | 13 +- include/linux/timerqueue_types.h | 17 ++ include/linux/types.h | 3 + include/linux/uaccess.h | 49 +++ include/linux/uidgid.h | 11 +- include/linux/uidgid_types.h | 15 + include/linux/uio.h | 2 +- include/linux/wait.h | 1 - include/linux/workqueue.h | 16 +- include/linux/workqueue_types.h | 25 ++ include/uapi/linux/resource.h | 2 +- init/init_task.c | 1 + ipc/shm.c | 1 + kernel/Makefile | 1 + kernel/exit.c | 4 +- kernel/fork.c | 2 + kernel/futex/core.c | 1 + kernel/futex/requeue.c | 1 + kernel/futex/waitwake.c | 1 + kernel/numa.c | 24 ++ kernel/pid_namespace.c | 1 + kernel/sched/core.c | 1 + mm/swapfile.c | 1 + security/selinux/hooks.c | 1 + security/smack/smack_lsm.c | 1 + 96 files changed, 1068 insertions(+), 825 deletions(-) create mode 100644 include/linux/cpumask_types.h create mode 100644 include/linux/hrtimer_types.h create mode 100644 include/linux/irqflags_types.h create mode 100644 include/linux/mutex_types.h create mode 100644 include/linux/nodemask_types.h create mode 100644 include/linux/pid_types.h create mode 100644 include/linux/plist_types.h create mode 100644 include/linux/posix-timers_types.h create mode 100644 include/linux/refcount_types.h create mode 100644 include/linux/rseq.h create mode 100644 include/linux/seccomp_types.h create mode 100644 include/linux/sem_types.h create mode 100644 include/linux/seqlock_types.h create mode 100644 include/linux/syscall_user_dispatch_types.h create mode 100644 include/linux/timer_types.h create mode 100644 include/linux/timerqueue_types.h create mode 100644 include/linux/uidgid_types.h create mode 100644 include/linux/workqueue_types.h create mode 100644 kernel/numa.c -- 2.43.0
