fork.c (b5869ce7f68b233ceb81465a7644be0d9a5f3dbb) fork.c (3e26c149c358529b1605f8959341d34bc4b880a3)
1/*
2 * linux/kernel/fork.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 */
6
7/*
8 * 'fork.c' contains the help-routines for the 'fork' system call

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102/* SLAB cache for vm_area_struct structures */
103struct kmem_cache *vm_area_cachep;
104
105/* SLAB cache for mm_struct structures (tsk->mm) */
106static struct kmem_cache *mm_cachep;
107
108void free_task(struct task_struct *tsk)
109{
1/*
2 * linux/kernel/fork.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 */
6
7/*
8 * 'fork.c' contains the help-routines for the 'fork' system call

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102/* SLAB cache for vm_area_struct structures */
103struct kmem_cache *vm_area_cachep;
104
105/* SLAB cache for mm_struct structures (tsk->mm) */
106static struct kmem_cache *mm_cachep;
107
108void free_task(struct task_struct *tsk)
109{
110 prop_local_destroy_single(&tsk->dirties);
110 free_thread_info(tsk->stack);
111 rt_mutex_debug_task_free(tsk);
112 free_task_struct(tsk);
113}
114EXPORT_SYMBOL(free_task);
115
116void __put_task_struct(struct task_struct *tsk)
117{

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158 init_task.signal->rlim[RLIMIT_SIGPENDING] =
159 init_task.signal->rlim[RLIMIT_NPROC];
160}
161
162static struct task_struct *dup_task_struct(struct task_struct *orig)
163{
164 struct task_struct *tsk;
165 struct thread_info *ti;
111 free_thread_info(tsk->stack);
112 rt_mutex_debug_task_free(tsk);
113 free_task_struct(tsk);
114}
115EXPORT_SYMBOL(free_task);
116
117void __put_task_struct(struct task_struct *tsk)
118{

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159 init_task.signal->rlim[RLIMIT_SIGPENDING] =
160 init_task.signal->rlim[RLIMIT_NPROC];
161}
162
163static struct task_struct *dup_task_struct(struct task_struct *orig)
164{
165 struct task_struct *tsk;
166 struct thread_info *ti;
167 int err;
166
167 prepare_to_copy(orig);
168
169 tsk = alloc_task_struct();
170 if (!tsk)
171 return NULL;
172
173 ti = alloc_thread_info(tsk);
174 if (!ti) {
175 free_task_struct(tsk);
176 return NULL;
177 }
178
179 *tsk = *orig;
180 tsk->stack = ti;
168
169 prepare_to_copy(orig);
170
171 tsk = alloc_task_struct();
172 if (!tsk)
173 return NULL;
174
175 ti = alloc_thread_info(tsk);
176 if (!ti) {
177 free_task_struct(tsk);
178 return NULL;
179 }
180
181 *tsk = *orig;
182 tsk->stack = ti;
183
184 err = prop_local_init_single(&tsk->dirties);
185 if (err) {
186 free_thread_info(ti);
187 free_task_struct(tsk);
188 return NULL;
189 }
190
181 setup_thread_stack(tsk, orig);
182
183#ifdef CONFIG_CC_STACKPROTECTOR
184 tsk->stack_canary = get_random_int();
185#endif
186
187 /* One for us, one for whoever does the "release_task()" (usually parent) */
188 atomic_set(&tsk->usage,2);

--- 1504 unchanged lines hidden --- 		191 setup_thread_stack(tsk, orig);
192
193#ifdef CONFIG_CC_STACKPROTECTOR
194 tsk->stack_canary = get_random_int();
195#endif
196
197 /* One for us, one for whoever does the "release_task()" (usually parent) */
198 atomic_set(&tsk->usage,2);

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