mm: make vm_area_alloc() initialize core fields
Like vm_area_dup(), it initializes the anon_vma_chain head, and the basic mm pointer. The rest of the fields end up being different for different users, although the plan is to also initialize the 'vm_ops' field to a dummy entry. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@@ -308,9 +308,15 @@ static struct kmem_cache *vm_area_cachep;
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/* SLAB cache for mm_struct structures (tsk->mm) */
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static struct kmem_cache *mm_cachep;
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struct vm_area_struct *vm_area_alloc(void)
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struct vm_area_struct *vm_area_alloc(struct mm_struct *mm)
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{
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return kmem_cache_zalloc(vm_area_cachep, GFP_KERNEL);
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struct vm_area_struct *vma = kmem_cache_zalloc(vm_area_cachep, GFP_KERNEL);
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if (vma) {
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vma->vm_mm = mm;
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INIT_LIST_HEAD(&vma->anon_vma_chain);
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}
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return vma;
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}
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struct vm_area_struct *vm_area_dup(struct vm_area_struct *orig)
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