From a5a0abfdb319713261f43a7fac0a1c3eb0e9d8ea Mon Sep 17 00:00:00 2001
From: Kent Overstreet <kent.overstreet@linux.dev>
Date: Fri, 15 Dec 2023 20:22:08 -0500
Subject: x86: fix missing includes/forward declarations

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
---
 arch/x86/include/asm/debugreg.h       | 1 +
 arch/x86/include/asm/paravirt.h       | 4 ++++
 arch/x86/include/asm/paravirt_types.h | 2 ++
 arch/x86/kernel/fpu/bugs.c            | 1 +
 arch/x86/lib/cache-smp.c              | 1 +
 5 files changed, 9 insertions(+)

(limited to 'arch/x86')

diff --git a/arch/x86/include/asm/debugreg.h b/arch/x86/include/asm/debugreg.h
index 66eb5e1ac4fb..0cec92c430cc 100644
--- a/arch/x86/include/asm/debugreg.h
+++ b/arch/x86/include/asm/debugreg.h
@@ -5,6 +5,7 @@
 #include <linux/bug.h>
 #include <linux/percpu.h>
 #include <uapi/asm/debugreg.h>
+#include <asm/cpufeature.h>
 
 DECLARE_PER_CPU(unsigned long, cpu_dr7);
 
diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h
index 6c8ff12140ae..49020002663b 100644
--- a/arch/x86/include/asm/paravirt.h
+++ b/arch/x86/include/asm/paravirt.h
@@ -6,6 +6,10 @@
 
 #include <asm/paravirt_types.h>
 
+#ifndef __ASSEMBLY__
+struct mm_struct;
+#endif
+
 #ifdef CONFIG_PARAVIRT
 #include <asm/pgtable_types.h>
 #include <asm/asm.h>
diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h
index 772d03487520..3cfcd5db083b 100644
--- a/arch/x86/include/asm/paravirt_types.h
+++ b/arch/x86/include/asm/paravirt_types.h
@@ -3,6 +3,8 @@
 #define _ASM_X86_PARAVIRT_TYPES_H
 
 #ifndef __ASSEMBLY__
+#include <linux/types.h>
+
 /* These all sit in the .parainstructions section to tell us what to patch. */
 struct paravirt_patch_site {
 	u8 *instr;		/* original instructions */
diff --git a/arch/x86/kernel/fpu/bugs.c b/arch/x86/kernel/fpu/bugs.c
index 794e70151203..a06b876bbf2d 100644
--- a/arch/x86/kernel/fpu/bugs.c
+++ b/arch/x86/kernel/fpu/bugs.c
@@ -2,6 +2,7 @@
 /*
  * x86 FPU bug checks:
  */
+#include <asm/cpufeature.h>
 #include <asm/fpu/api.h>
 
 /*
diff --git a/arch/x86/lib/cache-smp.c b/arch/x86/lib/cache-smp.c
index 7c48ff4ae8d1..7af743bd3b13 100644
--- a/arch/x86/lib/cache-smp.c
+++ b/arch/x86/lib/cache-smp.c
@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
+#include <asm/paravirt.h>
 #include <linux/smp.h>
 #include <linux/export.h>
 
-- 
cgit v1.2.3


From f551103cb964e9e6f5c03b3b8723424723731e76 Mon Sep 17 00:00:00 2001
From: Kent Overstreet <kent.overstreet@linux.dev>
Date: Fri, 15 Dec 2023 17:49:24 -0500
Subject: sched.h: move pid helpers to pid.h

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>
---
 arch/x86/um/sysrq_64.c          |   1 +
 drivers/gpu/drm/lima/lima_ctx.c |   1 +
 drivers/irqchip/irq-gic-v4.c    |   1 +
 include/linux/pid.h             | 125 ++++++++++++++++++++++++++++++++++++++++
 include/linux/sched.h           | 122 ---------------------------------------
 include/linux/sched/signal.h    |   1 +
 ipc/util.h                      |   1 +
 kernel/async.c                  |   5 +-
 kernel/locking/spinlock_debug.c |   1 +
 9 files changed, 134 insertions(+), 124 deletions(-)

(limited to 'arch/x86')

diff --git a/arch/x86/um/sysrq_64.c b/arch/x86/um/sysrq_64.c
index ef1eb4f4f612..0bf6de40abff 100644
--- a/arch/x86/um/sysrq_64.c
+++ b/arch/x86/um/sysrq_64.c
@@ -6,6 +6,7 @@
 
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/pid.h>
 #include <linux/sched.h>
 #include <linux/sched/debug.h>
 #include <linux/utsname.h>
diff --git a/drivers/gpu/drm/lima/lima_ctx.c b/drivers/gpu/drm/lima/lima_ctx.c
index 891d5cd5019a..8389f2d7d021 100644
--- a/drivers/gpu/drm/lima/lima_ctx.c
+++ b/drivers/gpu/drm/lima/lima_ctx.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0 OR MIT
 /* Copyright 2018-2019 Qiang Yu <yuq825@gmail.com> */
 
+#include <linux/pid.h>
 #include <linux/slab.h>
 
 #include "lima_device.h"
diff --git a/drivers/irqchip/irq-gic-v4.c b/drivers/irqchip/irq-gic-v4.c
index 94d56a03b175..ca32ac19d284 100644
--- a/drivers/irqchip/irq-gic-v4.c
+++ b/drivers/irqchip/irq-gic-v4.c
@@ -8,6 +8,7 @@
 #include <linux/irq.h>
 #include <linux/irqdomain.h>
 #include <linux/msi.h>
+#include <linux/pid.h>
 #include <linux/sched.h>
 
 #include <linux/irqchip/arm-gic-v4.h>
diff --git a/include/linux/pid.h b/include/linux/pid.h
index f254c3a45b9b..395cacce1179 100644
--- a/include/linux/pid.h
+++ b/include/linux/pid.h
@@ -4,7 +4,9 @@
 
 #include <linux/pid_types.h>
 #include <linux/rculist.h>
+#include <linux/rcupdate.h>
 #include <linux/refcount.h>
+#include <linux/sched.h>
 #include <linux/wait.h>
 
 /*
@@ -204,4 +206,127 @@ pid_t pid_vnr(struct pid *pid);
 		}							\
 		task = tg___;						\
 	} while_each_pid_task(pid, type, task)
+
+static inline struct pid *task_pid(struct task_struct *task)
+{
+	return task->thread_pid;
+}
+
+/*
+ * the helpers to get the task's different pids as they are seen
+ * from various namespaces
+ *
+ * task_xid_nr()     : global id, i.e. the id seen from the init namespace;
+ * task_xid_vnr()    : virtual id, i.e. the id seen from the pid namespace of
+ *                     current.
+ * task_xid_nr_ns()  : id seen from the ns specified;
+ *
+ * see also pid_nr() etc in include/linux/pid.h
+ */
+pid_t __task_pid_nr_ns(struct task_struct *task, enum pid_type type, struct pid_namespace *ns);
+
+static inline pid_t task_pid_nr(struct task_struct *tsk)
+{
+	return tsk->pid;
+}
+
+static inline pid_t task_pid_nr_ns(struct task_struct *tsk, struct pid_namespace *ns)
+{
+	return __task_pid_nr_ns(tsk, PIDTYPE_PID, ns);
+}
+
+static inline pid_t task_pid_vnr(struct task_struct *tsk)
+{
+	return __task_pid_nr_ns(tsk, PIDTYPE_PID, NULL);
+}
+
+
+static inline pid_t task_tgid_nr(struct task_struct *tsk)
+{
+	return tsk->tgid;
+}
+
+/**
+ * pid_alive - check that a task structure is not stale
+ * @p: Task structure to be checked.
+ *
+ * Test if a process is not yet dead (at most zombie state)
+ * If pid_alive fails, then pointers within the task structure
+ * can be stale and must not be dereferenced.
+ *
+ * Return: 1 if the process is alive. 0 otherwise.
+ */
+static inline int pid_alive(const struct task_struct *p)
+{
+	return p->thread_pid != NULL;
+}
+
+static inline pid_t task_pgrp_nr_ns(struct task_struct *tsk, struct pid_namespace *ns)
+{
+	return __task_pid_nr_ns(tsk, PIDTYPE_PGID, ns);
+}
+
+static inline pid_t task_pgrp_vnr(struct task_struct *tsk)
+{
+	return __task_pid_nr_ns(tsk, PIDTYPE_PGID, NULL);
+}
+
+
+static inline pid_t task_session_nr_ns(struct task_struct *tsk, struct pid_namespace *ns)
+{
+	return __task_pid_nr_ns(tsk, PIDTYPE_SID, ns);
+}
+
+static inline pid_t task_session_vnr(struct task_struct *tsk)
+{
+	return __task_pid_nr_ns(tsk, PIDTYPE_SID, NULL);
+}
+
+static inline pid_t task_tgid_nr_ns(struct task_struct *tsk, struct pid_namespace *ns)
+{
+	return __task_pid_nr_ns(tsk, PIDTYPE_TGID, ns);
+}
+
+static inline pid_t task_tgid_vnr(struct task_struct *tsk)
+{
+	return __task_pid_nr_ns(tsk, PIDTYPE_TGID, NULL);
+}
+
+static inline pid_t task_ppid_nr_ns(const struct task_struct *tsk, struct pid_namespace *ns)
+{
+	pid_t pid = 0;
+
+	rcu_read_lock();
+	if (pid_alive(tsk))
+		pid = task_tgid_nr_ns(rcu_dereference(tsk->real_parent), ns);
+	rcu_read_unlock();
+
+	return pid;
+}
+
+static inline pid_t task_ppid_nr(const struct task_struct *tsk)
+{
+	return task_ppid_nr_ns(tsk, &init_pid_ns);
+}
+
+/* Obsolete, do not use: */
+static inline pid_t task_pgrp_nr(struct task_struct *tsk)
+{
+	return task_pgrp_nr_ns(tsk, &init_pid_ns);
+}
+
+/**
+ * is_global_init - check if a task structure is init. Since init
+ * is free to have sub-threads we need to check tgid.
+ * @tsk: Task structure to be checked.
+ *
+ * Check if a task structure is the first user space task the kernel created.
+ *
+ * Return: 1 if the task structure is init. 0 otherwise.
+ */
+static inline int is_global_init(struct task_struct *tsk)
+{
+	return task_tgid_nr(tsk) == 1;
+}
+
 #endif /* _LINUX_PID_H */
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 37cc9d257073..9e2708c2cfa6 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1561,114 +1561,6 @@ struct task_struct {
 	 */
 };
 
-static inline struct pid *task_pid(struct task_struct *task)
-{
-	return task->thread_pid;
-}
-
-/*
- * the helpers to get the task's different pids as they are seen
- * from various namespaces
- *
- * task_xid_nr()     : global id, i.e. the id seen from the init namespace;
- * task_xid_vnr()    : virtual id, i.e. the id seen from the pid namespace of
- *                     current.
- * task_xid_nr_ns()  : id seen from the ns specified;
- *
- * see also pid_nr() etc in include/linux/pid.h
- */
-pid_t __task_pid_nr_ns(struct task_struct *task, enum pid_type type, struct pid_namespace *ns);
-
-static inline pid_t task_pid_nr(struct task_struct *tsk)
-{
-	return tsk->pid;
-}
-
-static inline pid_t task_pid_nr_ns(struct task_struct *tsk, struct pid_namespace *ns)
-{
-	return __task_pid_nr_ns(tsk, PIDTYPE_PID, ns);
-}
-
-static inline pid_t task_pid_vnr(struct task_struct *tsk)
-{
-	return __task_pid_nr_ns(tsk, PIDTYPE_PID, NULL);
-}
-
-
-static inline pid_t task_tgid_nr(struct task_struct *tsk)
-{
-	return tsk->tgid;
-}
-
-/**
- * pid_alive - check that a task structure is not stale
- * @p: Task structure to be checked.
- *
- * Test if a process is not yet dead (at most zombie state)
- * If pid_alive fails, then pointers within the task structure
- * can be stale and must not be dereferenced.
- *
- * Return: 1 if the process is alive. 0 otherwise.
- */
-static inline int pid_alive(const struct task_struct *p)
-{
-	return p->thread_pid != NULL;
-}
-
-static inline pid_t task_pgrp_nr_ns(struct task_struct *tsk, struct pid_namespace *ns)
-{
-	return __task_pid_nr_ns(tsk, PIDTYPE_PGID, ns);
-}
-
-static inline pid_t task_pgrp_vnr(struct task_struct *tsk)
-{
-	return __task_pid_nr_ns(tsk, PIDTYPE_PGID, NULL);
-}
-
-
-static inline pid_t task_session_nr_ns(struct task_struct *tsk, struct pid_namespace *ns)
-{
-	return __task_pid_nr_ns(tsk, PIDTYPE_SID, ns);
-}
-
-static inline pid_t task_session_vnr(struct task_struct *tsk)
-{
-	return __task_pid_nr_ns(tsk, PIDTYPE_SID, NULL);
-}
-
-static inline pid_t task_tgid_nr_ns(struct task_struct *tsk, struct pid_namespace *ns)
-{
-	return __task_pid_nr_ns(tsk, PIDTYPE_TGID, ns);
-}
-
-static inline pid_t task_tgid_vnr(struct task_struct *tsk)
-{
-	return __task_pid_nr_ns(tsk, PIDTYPE_TGID, NULL);
-}
-
-static inline pid_t task_ppid_nr_ns(const struct task_struct *tsk, struct pid_namespace *ns)
-{
-	pid_t pid = 0;
-
-	rcu_read_lock();
-	if (pid_alive(tsk))
-		pid = task_tgid_nr_ns(rcu_dereference(tsk->real_parent), ns);
-	rcu_read_unlock();
-
-	return pid;
-}
-
-static inline pid_t task_ppid_nr(const struct task_struct *tsk)
-{
-	return task_ppid_nr_ns(tsk, &init_pid_ns);
-}
-
-/* Obsolete, do not use: */
-static inline pid_t task_pgrp_nr(struct task_struct *tsk)
-{
-	return task_pgrp_nr_ns(tsk, &init_pid_ns);
-}
-
 #define TASK_REPORT_IDLE	(TASK_REPORT + 1)
 #define TASK_REPORT_MAX		(TASK_REPORT_IDLE << 1)
 
@@ -1712,20 +1604,6 @@ static inline char task_state_to_char(struct task_struct *tsk)
 	return task_index_to_char(task_state_index(tsk));
 }
 
-/**
- * is_global_init - check if a task structure is init. Since init
- * is free to have sub-threads we need to check tgid.
- * @tsk: Task structure to be checked.
- *
- * Check if a task structure is the first user space task the kernel created.
- *
- * Return: 1 if the task structure is init. 0 otherwise.
- */
-static inline int is_global_init(struct task_struct *tsk)
-{
-	return task_tgid_nr(tsk) == 1;
-}
-
 extern struct pid *cad_pid;
 
 /*
diff --git a/include/linux/sched/signal.h b/include/linux/sched/signal.h
index 3499c1a8b929..b847d8fa75a9 100644
--- a/include/linux/sched/signal.h
+++ b/include/linux/sched/signal.h
@@ -9,6 +9,7 @@
 #include <linux/sched/task.h>
 #include <linux/cred.h>
 #include <linux/refcount.h>
+#include <linux/pid.h>
 #include <linux/posix-timers.h>
 #include <linux/mm_types.h>
 #include <asm/ptrace.h>
diff --git a/ipc/util.h b/ipc/util.h
index 67bdd2aa2c28..a55d6cebe6d3 100644
--- a/ipc/util.h
+++ b/ipc/util.h
@@ -14,6 +14,7 @@
 #include <linux/unistd.h>
 #include <linux/err.h>
 #include <linux/ipc_namespace.h>
+#include <linux/pid.h>
 
 /*
  * The IPC ID contains 2 separate numbers - index and sequence number.
diff --git a/kernel/async.c b/kernel/async.c
index b2c4ba5686ee..79f6a3034b1f 100644
--- a/kernel/async.c
+++ b/kernel/async.c
@@ -46,11 +46,12 @@ asynchronous and synchronous parts of the kernel.
 
 #include <linux/async.h>
 #include <linux/atomic.h>
-#include <linux/ktime.h>
 #include <linux/export.h>
-#include <linux/wait.h>
+#include <linux/ktime.h>
+#include <linux/pid.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
+#include <linux/wait.h>
 #include <linux/workqueue.h>
 
 #include "workqueue_internal.h"
diff --git a/kernel/locking/spinlock_debug.c b/kernel/locking/spinlock_debug.c
index 14235671a1a7..87b03d2e41db 100644
--- a/kernel/locking/spinlock_debug.c
+++ b/kernel/locking/spinlock_debug.c
@@ -12,6 +12,7 @@
 #include <linux/debug_locks.h>
 #include <linux/delay.h>
 #include <linux/export.h>
+#include <linux/pid.h>
 
 void __raw_spin_lock_init(raw_spinlock_t *lock, const char *name,
 			  struct lock_class_key *key, short inner)
-- 
cgit v1.2.3


From 34470669829761424d231156eaa57115af975b51 Mon Sep 17 00:00:00 2001
From: Kent Overstreet <kent.overstreet@linux.dev>
Date: Mon, 11 Dec 2023 15:08:05 -0500
Subject: x86/signal: kill dependency on time.h

this is unecessary, and was pulling in printk.h from uapi headers

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
---
 arch/x86/include/uapi/asm/signal.h | 1 -
 1 file changed, 1 deletion(-)

(limited to 'arch/x86')

diff --git a/arch/x86/include/uapi/asm/signal.h b/arch/x86/include/uapi/asm/signal.h
index 777c3a0f4e23..f777346450ec 100644
--- a/arch/x86/include/uapi/asm/signal.h
+++ b/arch/x86/include/uapi/asm/signal.h
@@ -4,7 +4,6 @@
 
 #ifndef __ASSEMBLY__
 #include <linux/types.h>
-#include <linux/time.h>
 #include <linux/compiler.h>
 
 /* Avoid too many header ordering problems.  */
-- 
cgit v1.2.3


From 932562a6045ed613d45bd100db37114273c22077 Mon Sep 17 00:00:00 2001
From: Kent Overstreet <kent.overstreet@linux.dev>
Date: Fri, 15 Dec 2023 15:58:20 -0500
Subject: rseq: Split out rseq.h from sched.h

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>
---
 arch/arm64/kernel/ptrace.c       |   1 +
 arch/powerpc/kernel/interrupt.c  |   1 +
 arch/s390/kernel/signal.c        |   1 +
 arch/x86/kernel/signal.c         |   1 +
 fs/exec.c                        |   1 +
 include/linux/resume_user_mode.h |   1 +
 include/linux/rseq.h             | 131 +++++++++++++++++++++++++++++++++++++++
 include/linux/sched.h            | 125 +------------------------------------
 kernel/fork.c                    |   1 +
 kernel/sched/core.c              |   1 +
 10 files changed, 140 insertions(+), 124 deletions(-)
 create mode 100644 include/linux/rseq.h

(limited to 'arch/x86')

diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c
index 20d7ef82de90..09bb7fc7d3c2 100644
--- a/arch/arm64/kernel/ptrace.c
+++ b/arch/arm64/kernel/ptrace.c
@@ -28,6 +28,7 @@
 #include <linux/hw_breakpoint.h>
 #include <linux/regset.h>
 #include <linux/elf.h>
+#include <linux/rseq.h>
 
 #include <asm/compat.h>
 #include <asm/cpufeature.h>
diff --git a/arch/powerpc/kernel/interrupt.c b/arch/powerpc/kernel/interrupt.c
index c4f6d3c69ba9..eca293794a1e 100644
--- a/arch/powerpc/kernel/interrupt.c
+++ b/arch/powerpc/kernel/interrupt.c
@@ -3,6 +3,7 @@
 #include <linux/context_tracking.h>
 #include <linux/err.h>
 #include <linux/compat.h>
+#include <linux/rseq.h>
 #include <linux/sched/debug.h> /* for show_regs */
 
 #include <asm/kup.h>
diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c
index d63557d3868c..48e46809ee27 100644
--- a/arch/s390/kernel/signal.c
+++ b/arch/s390/kernel/signal.c
@@ -12,6 +12,7 @@
 
 #include <linux/sched.h>
 #include <linux/sched/task_stack.h>
+#include <linux/rseq.h>
 #include <linux/mm.h>
 #include <linux/smp.h>
 #include <linux/kernel.h>
diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c
index 65fe2094da59..31b6f5dddfc2 100644
--- a/arch/x86/kernel/signal.c
+++ b/arch/x86/kernel/signal.c
@@ -27,6 +27,7 @@
 #include <linux/context_tracking.h>
 #include <linux/entry-common.h>
 #include <linux/syscalls.h>
+#include <linux/rseq.h>
 
 #include <asm/processor.h>
 #include <asm/ucontext.h>
diff --git a/fs/exec.c b/fs/exec.c
index 4aa19b24f281..41773af7e3dc 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -66,6 +66,7 @@
 #include <linux/coredump.h>
 #include <linux/time_namespace.h>
 #include <linux/user_events.h>
+#include <linux/rseq.h>
 
 #include <linux/uaccess.h>
 #include <asm/mmu_context.h>
diff --git a/include/linux/resume_user_mode.h b/include/linux/resume_user_mode.h
index f8f3e958e9cf..e0135e0adae0 100644
--- a/include/linux/resume_user_mode.h
+++ b/include/linux/resume_user_mode.h
@@ -6,6 +6,7 @@
 #include <linux/sched.h>
 #include <linux/task_work.h>
 #include <linux/memcontrol.h>
+#include <linux/rseq.h>
 #include <linux/blk-cgroup.h>
 
 /**
diff --git a/include/linux/rseq.h b/include/linux/rseq.h
new file mode 100644
index 000000000000..bc8af3eb5598
--- /dev/null
+++ b/include/linux/rseq.h
@@ -0,0 +1,131 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
+#ifndef _LINUX_RSEQ_H
+#define _LINUX_RSEQ_H
+
+#ifdef CONFIG_RSEQ
+
+#include <linux/preempt.h>
+#include <linux/sched.h>
+
+/*
+ * Map the event mask on the user-space ABI enum rseq_cs_flags
+ * for direct mask checks.
+ */
+enum rseq_event_mask_bits {
+	RSEQ_EVENT_PREEMPT_BIT	= RSEQ_CS_FLAG_NO_RESTART_ON_PREEMPT_BIT,
+	RSEQ_EVENT_SIGNAL_BIT	= RSEQ_CS_FLAG_NO_RESTART_ON_SIGNAL_BIT,
+	RSEQ_EVENT_MIGRATE_BIT	= RSEQ_CS_FLAG_NO_RESTART_ON_MIGRATE_BIT,
+};
+
+enum rseq_event_mask {
+	RSEQ_EVENT_PREEMPT	= (1U << RSEQ_EVENT_PREEMPT_BIT),
+	RSEQ_EVENT_SIGNAL	= (1U << RSEQ_EVENT_SIGNAL_BIT),
+	RSEQ_EVENT_MIGRATE	= (1U << RSEQ_EVENT_MIGRATE_BIT),
+};
+
+static inline void rseq_set_notify_resume(struct task_struct *t)
+{
+	if (t->rseq)
+		set_tsk_thread_flag(t, TIF_NOTIFY_RESUME);
+}
+
+void __rseq_handle_notify_resume(struct ksignal *sig, struct pt_regs *regs);
+
+static inline void rseq_handle_notify_resume(struct ksignal *ksig,
+					     struct pt_regs *regs)
+{
+	if (current->rseq)
+		__rseq_handle_notify_resume(ksig, regs);
+}
+
+static inline void rseq_signal_deliver(struct ksignal *ksig,
+				       struct pt_regs *regs)
+{
+	preempt_disable();
+	__set_bit(RSEQ_EVENT_SIGNAL_BIT, &current->rseq_event_mask);
+	preempt_enable();
+	rseq_handle_notify_resume(ksig, regs);
+}
+
+/* rseq_preempt() requires preemption to be disabled. */
+static inline void rseq_preempt(struct task_struct *t)
+{
+	__set_bit(RSEQ_EVENT_PREEMPT_BIT, &t->rseq_event_mask);
+	rseq_set_notify_resume(t);
+}
+
+/* rseq_migrate() requires preemption to be disabled. */
+static inline void rseq_migrate(struct task_struct *t)
+{
+	__set_bit(RSEQ_EVENT_MIGRATE_BIT, &t->rseq_event_mask);
+	rseq_set_notify_resume(t);
+}
+
+/*
+ * If parent process has a registered restartable sequences area, the
+ * child inherits. Unregister rseq for a clone with CLONE_VM set.
+ */
+static inline void rseq_fork(struct task_struct *t, unsigned long clone_flags)
+{
+	if (clone_flags & CLONE_VM) {
+		t->rseq = NULL;
+		t->rseq_len = 0;
+		t->rseq_sig = 0;
+		t->rseq_event_mask = 0;
+	} else {
+		t->rseq = current->rseq;
+		t->rseq_len = current->rseq_len;
+		t->rseq_sig = current->rseq_sig;
+		t->rseq_event_mask = current->rseq_event_mask;
+	}
+}
+
+static inline void rseq_execve(struct task_struct *t)
+{
+	t->rseq = NULL;
+	t->rseq_len = 0;
+	t->rseq_sig = 0;
+	t->rseq_event_mask = 0;
+}
+
+#else
+
+static inline void rseq_set_notify_resume(struct task_struct *t)
+{
+}
+static inline void rseq_handle_notify_resume(struct ksignal *ksig,
+					     struct pt_regs *regs)
+{
+}
+static inline void rseq_signal_deliver(struct ksignal *ksig,
+				       struct pt_regs *regs)
+{
+}
+static inline void rseq_preempt(struct task_struct *t)
+{
+}
+static inline void rseq_migrate(struct task_struct *t)
+{
+}
+static inline void rseq_fork(struct task_struct *t, unsigned long clone_flags)
+{
+}
+static inline void rseq_execve(struct task_struct *t)
+{
+}
+
+#endif
+
+#ifdef CONFIG_DEBUG_RSEQ
+
+void rseq_syscall(struct pt_regs *regs);
+
+#else
+
+static inline void rseq_syscall(struct pt_regs *regs)
+{
+}
+
+#endif
+
+#endif /* _LINUX_RSEQ_H */
diff --git a/include/linux/sched.h b/include/linux/sched.h
index dd002d193726..a588b94988bc 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -35,7 +35,7 @@
 #include <linux/task_io_accounting.h>
 #include <linux/posix-timers_types.h>
 #include <linux/restart_block.h>
-#include <linux/rseq.h>
+#include <uapi/linux/rseq.h>
 #include <linux/seqlock_types.h>
 #include <linux/kcsan.h>
 #include <linux/rv.h>
@@ -2181,129 +2181,6 @@ static inline bool owner_on_cpu(struct task_struct *owner)
 unsigned long sched_cpu_util(int cpu);
 #endif /* CONFIG_SMP */
 
-#ifdef CONFIG_RSEQ
-
-/*
- * Map the event mask on the user-space ABI enum rseq_cs_flags
- * for direct mask checks.
- */
-enum rseq_event_mask_bits {
-	RSEQ_EVENT_PREEMPT_BIT	= RSEQ_CS_FLAG_NO_RESTART_ON_PREEMPT_BIT,
-	RSEQ_EVENT_SIGNAL_BIT	= RSEQ_CS_FLAG_NO_RESTART_ON_SIGNAL_BIT,
-	RSEQ_EVENT_MIGRATE_BIT	= RSEQ_CS_FLAG_NO_RESTART_ON_MIGRATE_BIT,
-};
-
-enum rseq_event_mask {
-	RSEQ_EVENT_PREEMPT	= (1U << RSEQ_EVENT_PREEMPT_BIT),
-	RSEQ_EVENT_SIGNAL	= (1U << RSEQ_EVENT_SIGNAL_BIT),
-	RSEQ_EVENT_MIGRATE	= (1U << RSEQ_EVENT_MIGRATE_BIT),
-};
-
-static inline void rseq_set_notify_resume(struct task_struct *t)
-{
-	if (t->rseq)
-		set_tsk_thread_flag(t, TIF_NOTIFY_RESUME);
-}
-
-void __rseq_handle_notify_resume(struct ksignal *sig, struct pt_regs *regs);
-
-static inline void rseq_handle_notify_resume(struct ksignal *ksig,
-					     struct pt_regs *regs)
-{
-	if (current->rseq)
-		__rseq_handle_notify_resume(ksig, regs);
-}
-
-static inline void rseq_signal_deliver(struct ksignal *ksig,
-				       struct pt_regs *regs)
-{
-	preempt_disable();
-	__set_bit(RSEQ_EVENT_SIGNAL_BIT, &current->rseq_event_mask);
-	preempt_enable();
-	rseq_handle_notify_resume(ksig, regs);
-}
-
-/* rseq_preempt() requires preemption to be disabled. */
-static inline void rseq_preempt(struct task_struct *t)
-{
-	__set_bit(RSEQ_EVENT_PREEMPT_BIT, &t->rseq_event_mask);
-	rseq_set_notify_resume(t);
-}
-
-/* rseq_migrate() requires preemption to be disabled. */
-static inline void rseq_migrate(struct task_struct *t)
-{
-	__set_bit(RSEQ_EVENT_MIGRATE_BIT, &t->rseq_event_mask);
-	rseq_set_notify_resume(t);
-}
-
-/*
- * If parent process has a registered restartable sequences area, the
- * child inherits. Unregister rseq for a clone with CLONE_VM set.
- */
-static inline void rseq_fork(struct task_struct *t, unsigned long clone_flags)
-{
-	if (clone_flags & CLONE_VM) {
-		t->rseq = NULL;
-		t->rseq_len = 0;
-		t->rseq_sig = 0;
-		t->rseq_event_mask = 0;
-	} else {
-		t->rseq = current->rseq;
-		t->rseq_len = current->rseq_len;
-		t->rseq_sig = current->rseq_sig;
-		t->rseq_event_mask = current->rseq_event_mask;
-	}
-}
-
-static inline void rseq_execve(struct task_struct *t)
-{
-	t->rseq = NULL;
-	t->rseq_len = 0;
-	t->rseq_sig = 0;
-	t->rseq_event_mask = 0;
-}
-
-#else
-
-static inline void rseq_set_notify_resume(struct task_struct *t)
-{
-}
-static inline void rseq_handle_notify_resume(struct ksignal *ksig,
-					     struct pt_regs *regs)
-{
-}
-static inline void rseq_signal_deliver(struct ksignal *ksig,
-				       struct pt_regs *regs)
-{
-}
-static inline void rseq_preempt(struct task_struct *t)
-{
-}
-static inline void rseq_migrate(struct task_struct *t)
-{
-}
-static inline void rseq_fork(struct task_struct *t, unsigned long clone_flags)
-{
-}
-static inline void rseq_execve(struct task_struct *t)
-{
-}
-
-#endif
-
-#ifdef CONFIG_DEBUG_RSEQ
-
-void rseq_syscall(struct pt_regs *regs);
-
-#else
-
-static inline void rseq_syscall(struct pt_regs *regs)
-{
-}
-
-#endif
-
 #ifdef CONFIG_SCHED_CORE
 extern void sched_core_free(struct task_struct *tsk);
 extern void sched_core_fork(struct task_struct *p);
diff --git a/kernel/fork.c b/kernel/fork.c
index 319e61297bfb..53816393995b 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -100,6 +100,7 @@
 #include <linux/stackprotector.h>
 #include <linux/user_events.h>
 #include <linux/iommu.h>
+#include <linux/rseq.h>
 
 #include <asm/pgalloc.h>
 #include <linux/uaccess.h>
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index a708d225c28e..d04cf3c47899 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -57,6 +57,7 @@
 #include <linux/profile.h>
 #include <linux/psi.h>
 #include <linux/rcuwait_api.h>
+#include <linux/rseq.h>
 #include <linux/sched/wake_q.h>
 #include <linux/scs.h>
 #include <linux/slab.h>
-- 
cgit v1.2.3


From 30094208cdc68cea9d814f8df94da7d0902ac6cd Mon Sep 17 00:00:00 2001
From: Kent Overstreet <kent.overstreet@linux.dev>
Date: Fri, 15 Dec 2023 17:02:03 -0500
Subject: Kill unnecessary kernel.h include

More trimming down unnecessary includes.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
---
 arch/x86/include/asm/current.h | 1 +
 arch/x86/include/asm/percpu.h  | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

(limited to 'arch/x86')

diff --git a/arch/x86/include/asm/current.h b/arch/x86/include/asm/current.h
index a1168e7b69e5..dd4b67101bb7 100644
--- a/arch/x86/include/asm/current.h
+++ b/arch/x86/include/asm/current.h
@@ -2,6 +2,7 @@
 #ifndef _ASM_X86_CURRENT_H
 #define _ASM_X86_CURRENT_H
 
+#include <linux/build_bug.h>
 #include <linux/compiler.h>
 
 #ifndef __ASSEMBLY__
diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h
index 20624b80f890..5e01883eb51e 100644
--- a/arch/x86/include/asm/percpu.h
+++ b/arch/x86/include/asm/percpu.h
@@ -24,8 +24,8 @@
 
 #else /* ...!ASSEMBLY */
 
-#include <linux/kernel.h>
 #include <linux/stringify.h>
+#include <asm/asm.h>
 
 #ifdef CONFIG_SMP
 #define __percpu_prefix		"%%"__stringify(__percpu_seg)":"
-- 
cgit v1.2.3


From e717ceb529653891f2283e2fd783edbb231e3562 Mon Sep 17 00:00:00 2001
From: Kent Overstreet <kent.overstreet@linux.dev>
Date: Fri, 15 Dec 2023 17:08:47 -0500
Subject: kill unnecessary thread_info.h include

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
---
 arch/x86/include/asm/fpu/types.h | 2 ++
 arch/x86/include/asm/preempt.h   | 1 -
 2 files changed, 2 insertions(+), 1 deletion(-)

(limited to 'arch/x86')

diff --git a/arch/x86/include/asm/fpu/types.h b/arch/x86/include/asm/fpu/types.h
index eb810074f1e7..3dad7cf25505 100644
--- a/arch/x86/include/asm/fpu/types.h
+++ b/arch/x86/include/asm/fpu/types.h
@@ -5,6 +5,8 @@
 #ifndef _ASM_X86_FPU_H
 #define _ASM_X86_FPU_H
 
+#include <asm/page_types.h>
+
 /*
  * The legacy x87 FPU state format, as saved by FSAVE and
  * restored by the FRSTOR instructions:
diff --git a/arch/x86/include/asm/preempt.h b/arch/x86/include/asm/preempt.h
index 4527e1430c6d..af77235fded6 100644
--- a/arch/x86/include/asm/preempt.h
+++ b/arch/x86/include/asm/preempt.h
@@ -6,7 +6,6 @@
 #include <asm/percpu.h>
 #include <asm/current.h>
 
-#include <linux/thread_info.h>
 #include <linux/static_call_types.h>
 
 /* We use the MSB mostly because its available */
-- 
cgit v1.2.3