Commit | Line | Data |
---|---|---|
61c4628b SS |
1 | #include <linux/errno.h> |
2 | #include <linux/kernel.h> | |
3 | #include <linux/mm.h> | |
4 | #include <linux/smp.h> | |
5 | #include <linux/slab.h> | |
6 | #include <linux/sched.h> | |
7 | ||
aa283f49 | 8 | struct kmem_cache *task_xstate_cachep; |
61c4628b SS |
9 | |
10 | int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src) | |
11 | { | |
12 | *dst = *src; | |
aa283f49 SS |
13 | if (src->thread.xstate) { |
14 | dst->thread.xstate = kmem_cache_alloc(task_xstate_cachep, | |
15 | GFP_KERNEL); | |
16 | if (!dst->thread.xstate) | |
17 | return -ENOMEM; | |
18 | WARN_ON((unsigned long)dst->thread.xstate & 15); | |
19 | memcpy(dst->thread.xstate, src->thread.xstate, xstate_size); | |
20 | } | |
61c4628b SS |
21 | return 0; |
22 | } | |
23 | ||
aa283f49 | 24 | void free_thread_xstate(struct task_struct *tsk) |
61c4628b | 25 | { |
aa283f49 SS |
26 | if (tsk->thread.xstate) { |
27 | kmem_cache_free(task_xstate_cachep, tsk->thread.xstate); | |
28 | tsk->thread.xstate = NULL; | |
29 | } | |
30 | } | |
31 | ||
61c4628b | 32 | |
aa283f49 SS |
33 | void free_thread_info(struct thread_info *ti) |
34 | { | |
35 | free_thread_xstate(ti->task); | |
61c4628b SS |
36 | free_pages((unsigned long)(ti), get_order(THREAD_SIZE)); |
37 | } | |
38 | ||
39 | void arch_task_cache_init(void) | |
40 | { | |
41 | task_xstate_cachep = | |
42 | kmem_cache_create("task_xstate", xstate_size, | |
43 | __alignof__(union thread_xstate), | |
44 | SLAB_PANIC, NULL); | |
45 | } |