projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| cbf6b1ba PM |
1 | #include <linux/mm.h> |
| 2 | #include <linux/kernel.h> | |
| 5a0e3ad6 | 3 | #include <linux/slab.h> |
| cbf6b1ba PM |
4 | #include <linux/sched.h> |
| 5 | ||
| 0ea820cf PM |
6 | struct kmem_cache *task_xstate_cachep = NULL; |
| 7 | unsigned int xstate_size; | |
| 8 | ||
| 9 | int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src) | |
| 10 | { | |
| 11 | *dst = *src; | |
| 12 | ||
| 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 | memcpy(dst->thread.xstate, src->thread.xstate, xstate_size); | |
| 19 | } | |
| 20 | ||
| 21 | return 0; | |
| 22 | } | |
| 23 | ||
| 24 | void free_thread_xstate(struct task_struct *tsk) | |
| 25 | { | |
| 26 | if (tsk->thread.xstate) { | |
| 27 | kmem_cache_free(task_xstate_cachep, tsk->thread.xstate); | |
| 28 | tsk->thread.xstate = NULL; | |
| 29 | } | |
| 30 | } | |
| 31 | ||
| cbf6b1ba PM |
32 | #if THREAD_SHIFT < PAGE_SHIFT |
| 33 | static struct kmem_cache *thread_info_cache; | |
| 34 | ||
| b15ed691 | 35 | struct thread_info *alloc_thread_info_node(struct task_struct *tsk, int node) |
| cbf6b1ba PM |
36 | { |
| 37 | struct thread_info *ti; | |
| cbf6b1ba | 38 | #ifdef CONFIG_DEBUG_STACK_USAGE |
| b6a84016 ED |
39 | gfp_t mask = GFP_KERNEL | __GFP_ZERO; |
| 40 | #else | |
| 41 | gfp_t mask = GFP_KERNEL; | |
| cbf6b1ba | 42 | #endif |
| b6a84016 ED |
43 | |
| 44 | ti = kmem_cache_alloc_node(thread_info_cache, mask, node); | |
| cbf6b1ba PM |
45 | return ti; |
| 46 | } | |
| 47 | ||
| 48 | void free_thread_info(struct thread_info *ti) | |
| 49 | { | |
| 0ea820cf | 50 | free_thread_xstate(ti->task); |
| cbf6b1ba PM |
51 | kmem_cache_free(thread_info_cache, ti); |
| 52 | } | |
| 53 | ||
| 54 | void thread_info_cache_init(void) | |
| 55 | { | |
| 56 | thread_info_cache = kmem_cache_create("thread_info", THREAD_SIZE, | |
| a3705799 | 57 | THREAD_SIZE, SLAB_PANIC, NULL); |
| cbf6b1ba PM |
58 | } |
| 59 | #else | |
| b15ed691 | 60 | struct thread_info *alloc_thread_info_node(struct task_struct *tsk, int node) |
| cbf6b1ba PM |
61 | { |
| 62 | #ifdef CONFIG_DEBUG_STACK_USAGE | |
| 63 | gfp_t mask = GFP_KERNEL | __GFP_ZERO; | |
| 64 | #else | |
| 65 | gfp_t mask = GFP_KERNEL; | |
| 66 | #endif | |
| b6a84016 ED |
67 | struct page *page = alloc_pages_node(node, mask, THREAD_SIZE_ORDER); |
| 68 | ||
| 69 | return page ? page_address(page) : NULL; | |
| cbf6b1ba PM |
70 | } |
| 71 | ||
| 72 | void free_thread_info(struct thread_info *ti) | |
| 73 | { | |
| 0ea820cf | 74 | free_thread_xstate(ti->task); |
| cbf6b1ba PM |
75 | free_pages((unsigned long)ti, THREAD_SIZE_ORDER); |
| 76 | } | |
| 77 | #endif /* THREAD_SHIFT < PAGE_SHIFT */ | |
| 0ea820cf PM |
78 | |
| 79 | void arch_task_cache_init(void) | |
| 80 | { | |
| 81 | if (!xstate_size) | |
| 82 | return; | |
| 83 | ||
| 84 | task_xstate_cachep = kmem_cache_create("task_xstate", xstate_size, | |
| 85 | __alignof__(union thread_xstate), | |
| 86 | SLAB_PANIC | SLAB_NOTRACK, NULL); | |
| 87 | } | |
| 88 | ||
| 89 | #ifdef CONFIG_SH_FPU_EMU | |
| 90 | # define HAVE_SOFTFP 1 | |
| 91 | #else | |
| 92 | # define HAVE_SOFTFP 0 | |
| 93 | #endif | |
| 94 | ||
| 4a6feab0 | 95 | void __cpuinit init_thread_xstate(void) |
| 0ea820cf PM |
96 | { |
| 97 | if (boot_cpu_data.flags & CPU_HAS_FPU) | |
| 98 | xstate_size = sizeof(struct sh_fpu_hard_struct); | |
| 99 | else if (HAVE_SOFTFP) | |
| 100 | xstate_size = sizeof(struct sh_fpu_soft_struct); | |
| 101 | else | |
| 102 | xstate_size = 0; | |
| 103 | } |