[PATCH 00/50] big header dependency cleanup targeting sched.h

From: Kent Overstreet
Date: Fri Dec 15 2023 - 21:48:59 EST

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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

Next message: Kent Overstreet: "[PATCH 01/50] drivers/gpu/drm/i915/i915_memcpy.c: fix missing includes"
Previous message: Richard Acayan: "Re: [PATCH 1/3] arm64: dts: qcom: sdm670: fix USB DP/DM HS PHY interrupts"
Next in thread: Kent Overstreet: "[PATCH 01/50] drivers/gpu/drm/i915/i915_memcpy.c: fix missing includes"
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