From 01573e231f18eb2d99162747186f59511f56b64d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 08 Dec 2023 10:40:48 +0000
Subject: [PATCH] 移去rt
---
kernel/include/linux/sched/task.h | 73 ++++++++++++++++++++++--------------
1 files changed, 44 insertions(+), 29 deletions(-)
diff --git a/kernel/include/linux/sched/task.h b/kernel/include/linux/sched/task.h
index 5f8c1d5..5629761 100644
--- a/kernel/include/linux/sched/task.h
+++ b/kernel/include/linux/sched/task.h
@@ -8,10 +8,33 @@
*/
#include <linux/sched.h>
+#include <linux/uaccess.h>
struct task_struct;
struct rusage;
union thread_union;
+struct css_set;
+
+/* All the bits taken by the old clone syscall. */
+#define CLONE_LEGACY_FLAGS 0xffffffffULL
+
+struct kernel_clone_args {
+ u64 flags;
+ int __user *pidfd;
+ int __user *child_tid;
+ int __user *parent_tid;
+ int exit_signal;
+ unsigned long stack;
+ unsigned long stack_size;
+ unsigned long tls;
+ pid_t *set_tid;
+ /* Number of elements in *set_tid */
+ size_t set_tid_size;
+ int cgroup;
+ int io_thread;
+ struct cgroup *cgrp;
+ struct css_set *cset;
+};
/*
* This serializes "schedule()" and also protects
@@ -33,6 +56,8 @@
extern void init_idle(struct task_struct *idle, int cpu);
extern int sched_fork(unsigned long clone_flags, struct task_struct *p);
+extern void sched_cgroup_fork(struct task_struct *p, struct kernel_clone_args *kargs);
+extern void sched_post_fork(struct task_struct *p);
extern void sched_dead(struct task_struct *p);
void __noreturn do_task_dead(void);
@@ -43,22 +68,9 @@
extern void release_task(struct task_struct * p);
-#ifdef CONFIG_HAVE_COPY_THREAD_TLS
-extern int copy_thread_tls(unsigned long, unsigned long, unsigned long,
- struct task_struct *, unsigned long);
-#else
extern int copy_thread(unsigned long, unsigned long, unsigned long,
- struct task_struct *);
+ struct task_struct *, unsigned long);
-/* Architectures that haven't opted into copy_thread_tls get the tls argument
- * via pt_regs, so ignore the tls argument passed via C. */
-static inline int copy_thread_tls(
- unsigned long clone_flags, unsigned long sp, unsigned long arg,
- struct task_struct *p, unsigned long tls)
-{
- return copy_thread(clone_flags, sp, arg, p);
-}
-#endif
extern void flush_thread(void);
#ifdef CONFIG_HAVE_EXIT_THREAD
@@ -71,13 +83,15 @@
extern void do_group_exit(int);
extern void exit_files(struct task_struct *);
-extern void exit_itimers(struct signal_struct *);
+extern void exit_itimers(struct task_struct *);
-extern long _do_fork(unsigned long, unsigned long, unsigned long, int __user *, int __user *, unsigned long);
-extern long do_fork(unsigned long, unsigned long, unsigned long, int __user *, int __user *);
+extern pid_t kernel_clone(struct kernel_clone_args *kargs);
+struct task_struct *create_io_thread(int (*fn)(void *), void *arg, int node);
struct task_struct *fork_idle(int);
+struct mm_struct *copy_init_mm(void);
extern pid_t kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
extern long kernel_wait4(pid_t, int __user *, int, struct rusage *);
+int kernel_wait(pid_t pid, int *stat);
extern void free_task(struct task_struct *tsk);
@@ -88,26 +102,27 @@
#define sched_exec() {}
#endif
-#define get_task_struct(tsk) do { atomic_inc(&(tsk)->usage); } while(0)
-
-#ifdef CONFIG_PREEMPT_RT_BASE
-extern void __put_task_struct_cb(struct rcu_head *rhp);
-
-static inline void put_task_struct(struct task_struct *t)
+static inline struct task_struct *get_task_struct(struct task_struct *t)
{
- if (atomic_dec_and_test(&t->usage))
- call_rcu(&t->put_rcu, __put_task_struct_cb);
+ refcount_inc(&t->usage);
+ return t;
}
-#else
+
extern void __put_task_struct(struct task_struct *t);
static inline void put_task_struct(struct task_struct *t)
{
- if (atomic_dec_and_test(&t->usage))
+ if (refcount_dec_and_test(&t->usage))
__put_task_struct(t);
}
-#endif
-struct task_struct *task_rcu_dereference(struct task_struct **ptask);
+
+static inline void put_task_struct_many(struct task_struct *t, int nr)
+{
+ if (refcount_sub_and_test(nr, &t->usage))
+ __put_task_struct(t);
+}
+
+void put_task_struct_rcu_user(struct task_struct *task);
#ifdef CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT
extern int arch_task_struct_size __read_mostly;
--
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