48 lines
1.1 KiB
C
48 lines
1.1 KiB
C
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#include <linux/mm.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#if THREAD_SHIFT < PAGE_SHIFT
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static struct kmem_cache *thread_info_cache;
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struct thread_info *alloc_thread_info(struct task_struct *tsk)
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{
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struct thread_info *ti;
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ti = kmem_cache_alloc(thread_info_cache, GFP_KERNEL);
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if (unlikely(ti == NULL))
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return NULL;
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#ifdef CONFIG_DEBUG_STACK_USAGE
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memset(ti, 0, THREAD_SIZE);
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#endif
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return ti;
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}
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void free_thread_info(struct thread_info *ti)
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{
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kmem_cache_free(thread_info_cache, ti);
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}
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void thread_info_cache_init(void)
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{
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thread_info_cache = kmem_cache_create("thread_info", THREAD_SIZE,
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THREAD_SIZE, 0, NULL);
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BUG_ON(thread_info_cache == NULL);
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}
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#else
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struct thread_info *alloc_thread_info(struct task_struct *tsk)
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{
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#ifdef CONFIG_DEBUG_STACK_USAGE
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gfp_t mask = GFP_KERNEL | __GFP_ZERO;
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#else
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gfp_t mask = GFP_KERNEL;
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#endif
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return (struct thread_info *)__get_free_pages(mask, THREAD_SIZE_ORDER);
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}
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void free_thread_info(struct thread_info *ti)
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{
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free_pages((unsigned long)ti, THREAD_SIZE_ORDER);
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}
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#endif /* THREAD_SHIFT < PAGE_SHIFT */
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