fork.c (1aa77e716c6f2332f2d4664f747ff4eba731825b) fork.c (9a10064f5625d5572c3626c1516e0bebc6c9fe9b)
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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360 ASSERT_EXCLUSIVE_WRITER(orig->vm_file);
361 /*
362 * orig->shared.rb may be modified concurrently, but the clone
363 * will be reinitialized.
364 */
365 *new = data_race(*orig);
366 INIT_LIST_HEAD(&new->anon_vma_chain);
367 new->vm_next = new->vm_prev = NULL;
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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360 ASSERT_EXCLUSIVE_WRITER(orig->vm_file);
361 /*
362 * orig->shared.rb may be modified concurrently, but the clone
363 * will be reinitialized.
364 */
365 *new = data_race(*orig);
366 INIT_LIST_HEAD(&new->anon_vma_chain);
367 new->vm_next = new->vm_prev = NULL;
368 dup_vma_anon_name(orig, new);
368 }
369 return new;
370}
371
372void vm_area_free(struct vm_area_struct *vma)
373{
369 }
370 return new;
371}
372
373void vm_area_free(struct vm_area_struct *vma)
374{
375 free_vma_anon_name(vma);
374 kmem_cache_free(vm_area_cachep, vma);
375}
376
377static void account_kernel_stack(struct task_struct *tsk, int account)
378{
379 void *stack = task_stack_page(tsk);
380 struct vm_struct *vm = task_stack_vm_area(tsk);
381

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1551 goto out;
1552
1553 tsk->files = newf;
1554 error = 0;
1555out:
1556 return error;
1557}
1558
376 kmem_cache_free(vm_area_cachep, vma);
377}
378
379static void account_kernel_stack(struct task_struct *tsk, int account)
380{
381 void *stack = task_stack_page(tsk);
382 struct vm_struct *vm = task_stack_vm_area(tsk);
383

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1553 goto out;
1554
1555 tsk->files = newf;
1556 error = 0;
1557out:
1558 return error;
1559}
1560
1561static int copy_io(unsigned long clone_flags, struct task_struct *tsk)
1562{
1563#ifdef CONFIG_BLOCK
1564 struct io_context *ioc = current->io_context;
1565 struct io_context *new_ioc;
1566
1567 if (!ioc)
1568 return 0;
1569 /*
1570 * Share io context with parent, if CLONE_IO is set
1571 */
1572 if (clone_flags & CLONE_IO) {
1573 ioc_task_link(ioc);
1574 tsk->io_context = ioc;
1575 } else if (ioprio_valid(ioc->ioprio)) {
1576 new_ioc = get_task_io_context(tsk, GFP_KERNEL, NUMA_NO_NODE);
1577 if (unlikely(!new_ioc))
1578 return -ENOMEM;
1579
1580 new_ioc->ioprio = ioc->ioprio;
1581 put_io_context(new_ioc);
1582 }
1583#endif
1584 return 0;
1585}
1586
1559static int copy_sighand(unsigned long clone_flags, struct task_struct *tsk)
1560{
1561 struct sighand_struct *sig;
1562
1563 if (clone_flags & CLONE_SIGHAND) {
1564 refcount_inc(&current->sighand->count);
1565 return 0;
1566 }

--- 1602 unchanged lines hidden --- 		1587static int copy_sighand(unsigned long clone_flags, struct task_struct *tsk)
1588{
1589 struct sighand_struct *sig;
1590
1591 if (clone_flags & CLONE_SIGHAND) {
1592 refcount_inc(&current->sighand->count);
1593 return 0;
1594 }

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