Since 1d71b30e1f85 ("sched.h: Move (spin|rwlock)_needbreak() to
spinlock.h") build fails for PREEMPT_RT, since there is no definition
available of either spin_needbreak() and rwlock_needbreak().

Since it was moved on the mentioned commit, it was placed inside a
!PREEMPT_RT part of the code, making it out of reach for an RT kernel.

Fix this by moving code it a few lines down so it can be reached by an
RT build, where it can also make use of the *_is_contended() definition
added by the spinlock_rt.h.

Fixes: d1d71b30 ("sched.h: Move (spin|rwlock)_needbreak() to
spinlock.h")
Signed-off-by: Leonardo Bras <leobras@redhat.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Acked-by: Waiman Long <longman@redhat.com>

by moving cond_resched_rcu() to rcupdate_wait.h, we can kill another big
sched.h dependency.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

More trimming down unnecessary includes.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

We really only need types.h, list.h is big.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

We're trying to get sched.h down to more or less just types only, not
code - rseq can live in its own header.

This helps us kill the dependency on preempt.h in sched.h.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

loongarch's signal.c uses rseq_signal_deliver() so it should
pull in the appropriate header to prevent a build error:

../arch/loongarch/kernel/signal.c: In function 'handle_signal':
../arch/loongarch/kernel/signal.c:1034:9: error: implicit declaration of function 'rseq_signal_deliver' [-Werror=implicit-function-declaration]
 1034 |         rseq_signal_deliver(ksig, regs);
      |         ^~~~~~~~~~~~~~~~~~~

Fixes: b74baf4a ("LoongArch: Add signal handling support")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: WANG Xuerui <kernel@xen0n.name>
Cc: loongarch@lists.linux.dev
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

We don't actually use any timekeeping types, no need to pull in
time64.h.

Also, sched.h uses restart_block; add it as a direct dependency.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

held_lock is embedded in task_struct, and we don't want sched.h pulling
in all of lockdep.h
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Acked-by: Waiman Long <longman@redhat.com>

More sched.h dependency pruning.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

More sched.h dependency pruning.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Reviewed-by: Christian Brauner <brauner@kernel.org>

More pruning of sched.h dependencies.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

More trimming of sched.h dependencies.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

We should't be depending on time.h; we should only be pulling in other
uapi headers.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

this is unecessary, and was pulling in printk.h from uapi headers
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

thread_info.h pulls in a lot of junk that sched.h that we don't need; in
particular, this helps to kill the printk.h dependency.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

more sched.h header dependency trimming
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

We're working on only pulling in type definitions to sched.h whenever
possible.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

pruning sched.h dependencies, headers shouldn't pull in more than they
need.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

list_head is in types.h, not list.h., and the uapi header wasn't needed.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

More sched.h dependency culling - this lets us kill a rhashtable-types.h
dependency on workqueue.h.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

Cutting down on sched.h dependencies: this is going to be used in
workqueue_types.h in the next patch, so we can kill the sched.h
dependency on workqueue.h.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

list_head is in types.h, not list.h.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

Trimming down sched.h dependencies: timerqueue_types can include just
rbtree_types.h instead of pulling in rbtree.h.

Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

list_head is defined in types.h, not list.h - this kills a sched.h
dependency.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

There's really no overlap between uapi/linux/wait.h and linux/wait.h.
There are two files which rely on the uapi file being implcitly included,
so explicitly include it there and remove it from the main header file.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Reviewed-by: Christian Brauner <brauner@kernel.org>

Trimming down sched.h dependencies: we don't want to include more than
the base types.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

This is needed for killing the sched.h dependency on rcupdate.h, and
pid.h is a better place for this code anyways.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

Trimming down sched.h dependencies: we dont't want to include more than
the base types.

Cc: Kees Cook <keescook@chromium.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Will Drewry <wad@chromium.org>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

Trimming down sched.h dependencies: we don't want to include more than
the base types.

Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Will Deacon <will@kernel.org>
Cc: Waiman Long <longman@redhat.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

Trimming down sched.h dependencies: we don't want to include more than
the base types.

Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

Trimming down sched.h dependencies: we don't want to include more than
the base types.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Will Deacon <will@kernel.org>
Cc: Waiman Long <longman@redhat.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

We need to reduce the scope of what's included in sched.h: task_struct
includes a hrtimer, so split out the core types into their own header.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Thomas Gleixner <tglx@linutronix.de>

ktime.h pulls in quite a few headers recursively (including printk.h) -
this is going to help with trimming sched.h dependencies.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

This lets us kill the dependency on spinlock.h.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

Moving these stub functions to a .c file means we can kill a sched.h
dependency on printk.h.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

Replace linux/percpu.h include with asm/percpu.h to avoid circular
dependency.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Signed-off-by: Suren Baghdasaryan <surenb@google.com>

Slimming down recursive header includes.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Thomas Gleixner <tglx@linutronix.de>

prandom.h doesn't use percpu.h - this fixes some circular header issues.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Signed-off-by: Suren Baghdasaryan <surenb@google.com>

sched.h, which defines task_struct, needs nodemask_t - but sched.h is a
frequently used header and ideally shouldn't be pulling in any more code
that it needs to.

This splits out nodemask_types.h which has the definition sched.h needs,
which will avoid a circular header dependency in the alloc tagging patch
series, and as a bonus should speed up kernel build times.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>