fork.c (13685c4a08fca9dd76bf53bfcbadc044ab2a08cb) fork.c (b75058614fdd3140074a640b514f6a0b4d485a2d)
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * linux/kernel/fork.c
4 *
5 * Copyright (C) 1991, 1992 Linus Torvalds
6 */
7
8/*

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1949 * Clear TID on mm_release()?
1950 */
1951 p->clear_child_tid = (clone_flags & CLONE_CHILD_CLEARTID) ? args->child_tid : NULL;
1952
1953 ftrace_graph_init_task(p);
1954
1955 rt_mutex_init_task(p);
1956
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * linux/kernel/fork.c
4 *
5 * Copyright (C) 1991, 1992 Linus Torvalds
6 */
7
8/*

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1949 * Clear TID on mm_release()?
1950 */
1951 p->clear_child_tid = (clone_flags & CLONE_CHILD_CLEARTID) ? args->child_tid : NULL;
1952
1953 ftrace_graph_init_task(p);
1954
1955 rt_mutex_init_task(p);
1956
1957 lockdep_assert_irqs_enabled();
1957#ifdef CONFIG_PROVE_LOCKING
1958#ifdef CONFIG_PROVE_LOCKING
1958 DEBUG_LOCKS_WARN_ON(!p->hardirqs_enabled);
1959 DEBUG_LOCKS_WARN_ON(!p->softirqs_enabled);
1960#endif
1961 retval = -EAGAIN;
1962 if (atomic_read(&p->real_cred->user->processes) >=
1963 task_rlimit(p, RLIMIT_NPROC)) {
1964 if (p->real_cred->user != INIT_USER &&
1965 !capable(CAP_SYS_RESOURCE) && !capable(CAP_SYS_ADMIN))
1966 goto bad_fork_free;

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2027 retval = PTR_ERR(p->mempolicy);
2028 p->mempolicy = NULL;
2029 goto bad_fork_cleanup_threadgroup_lock;
2030 }
2031#endif
2032#ifdef CONFIG_CPUSETS
2033 p->cpuset_mem_spread_rotor = NUMA_NO_NODE;
2034 p->cpuset_slab_spread_rotor = NUMA_NO_NODE;
1959 DEBUG_LOCKS_WARN_ON(!p->softirqs_enabled);
1960#endif
1961 retval = -EAGAIN;
1962 if (atomic_read(&p->real_cred->user->processes) >=
1963 task_rlimit(p, RLIMIT_NPROC)) {
1964 if (p->real_cred->user != INIT_USER &&
1965 !capable(CAP_SYS_RESOURCE) && !capable(CAP_SYS_ADMIN))
1966 goto bad_fork_free;

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2027 retval = PTR_ERR(p->mempolicy);
2028 p->mempolicy = NULL;
2029 goto bad_fork_cleanup_threadgroup_lock;
2030 }
2031#endif
2032#ifdef CONFIG_CPUSETS
2033 p->cpuset_mem_spread_rotor = NUMA_NO_NODE;
2034 p->cpuset_slab_spread_rotor = NUMA_NO_NODE;
2035 seqcount_init(&p->mems_allowed_seq);
2035 seqcount_spinlock_init(&p->mems_allowed_seq, &p->alloc_lock);
2036#endif
2037#ifdef CONFIG_TRACE_IRQFLAGS
2038 p->irq_events = 0;
2036#endif
2037#ifdef CONFIG_TRACE_IRQFLAGS
2038 p->irq_events = 0;
2039 p->hardirqs_enabled = 0;
2040 p->hardirq_enable_ip = 0;
2041 p->hardirq_enable_event = 0;
2042 p->hardirq_disable_ip = _THIS_IP_;
2043 p->hardirq_disable_event = 0;
2044 p->softirqs_enabled = 1;
2045 p->softirq_enable_ip = _THIS_IP_;
2046 p->softirq_enable_event = 0;
2047 p->softirq_disable_ip = 0;
2048 p->softirq_disable_event = 0;
2039 p->hardirq_enable_ip = 0;
2040 p->hardirq_enable_event = 0;
2041 p->hardirq_disable_ip = _THIS_IP_;
2042 p->hardirq_disable_event = 0;
2043 p->softirqs_enabled = 1;
2044 p->softirq_enable_ip = _THIS_IP_;
2045 p->softirq_enable_event = 0;
2046 p->softirq_disable_ip = 0;
2047 p->softirq_disable_event = 0;
2049 p->hardirq_context = 0;
2050 p->softirq_context = 0;
2051#endif
2052
2053 p->pagefault_disabled = 0;
2054
2055#ifdef CONFIG_LOCKDEP
2056 lockdep_init_task(p);
2057#endif

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2299 }
2300 total_forks++;
2301 hlist_del_init(&delayed.node);
2302 spin_unlock(&current->sighand->siglock);
2303 syscall_tracepoint_update(p);
2304 write_unlock_irq(&tasklist_lock);
2305
2306 proc_fork_connector(p);
2048 p->softirq_context = 0;
2049#endif
2050
2051 p->pagefault_disabled = 0;
2052
2053#ifdef CONFIG_LOCKDEP
2054 lockdep_init_task(p);
2055#endif

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2297 }
2298 total_forks++;
2299 hlist_del_init(&delayed.node);
2300 spin_unlock(&current->sighand->siglock);
2301 syscall_tracepoint_update(p);
2302 write_unlock_irq(&tasklist_lock);
2303
2304 proc_fork_connector(p);
2307 sched_post_fork(p);
2308 cgroup_post_fork(p, args);
2309 perf_event_fork(p);
2310
2311 trace_task_newtask(p, clone_flags);
2312 uprobe_copy_process(p, clone_flags);
2313
2314 return p;
2315

--- 785 unchanged lines hidden --- 		2305 cgroup_post_fork(p, args);
2306 perf_event_fork(p);
2307
2308 trace_task_newtask(p, clone_flags);
2309 uprobe_copy_process(p, clone_flags);
2310
2311 return p;
2312

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