30 	struct vm_area_struct *dst_vma;  in find_dst_vma()  local
32 	dst_vma = find_vma(dst_mm, dst_start);  in find_dst_vma()
33 	if (!dst_vma)  in find_dst_vma()
36 	if (dst_start < dst_vma->vm_start ||  in find_dst_vma()
37 	    dst_start + len > dst_vma->vm_end)  in find_dst_vma()
45 	if (!dst_vma->vm_userfaultfd_ctx.ctx)  in find_dst_vma()
48 	return dst_vma;  in find_dst_vma()
58 			     struct vm_area_struct *dst_vma,  in mfill_atomic_install_pte()  argument
64 	bool writable = dst_vma->vm_flags & VM_WRITE;  in mfill_atomic_install_pte()
65 	bool vm_shared = dst_vma->vm_flags & VM_SHARED;  in mfill_atomic_install_pte()
71 	_dst_pte = mk_pte(page, dst_vma->vm_page_prot);  in mfill_atomic_install_pte()
85 	if (vma_is_shmem(dst_vma)) {  in mfill_atomic_install_pte()
87 		inode = dst_vma->vm_file->f_inode;  in mfill_atomic_install_pte()
88 		offset = linear_page_index(dst_vma, dst_addr);  in mfill_atomic_install_pte()
102 		page_add_new_anon_rmap(page, dst_vma, dst_addr, false);  in mfill_atomic_install_pte()
111 		lru_cache_add_inactive_or_unevictable(page, dst_vma);  in mfill_atomic_install_pte()
116 	update_mmu_cache(dst_vma, dst_addr, dst_pte);  in mfill_atomic_install_pte()
125 			    struct vm_area_struct *dst_vma,  in mcopy_atomic_pte()  argument
137 		page = alloc_page_vma(GFP_HIGHUSER_MOVABLE, dst_vma, dst_addr);  in mcopy_atomic_pte()
172 	ret = mfill_atomic_install_pte(dst_mm, dst_pmd, dst_vma, dst_addr,  in mcopy_atomic_pte()
185 			      struct vm_area_struct *dst_vma,  in mfill_zeropage_pte()  argument
195 					 dst_vma->vm_page_prot));  in mfill_zeropage_pte()
197 	if (dst_vma->vm_file) {  in mfill_zeropage_pte()
199 		inode = dst_vma->vm_file->f_inode;  in mfill_zeropage_pte()
200 		offset = linear_page_index(dst_vma, dst_addr);  in mfill_zeropage_pte()
211 	update_mmu_cache(dst_vma, dst_addr, dst_pte);  in mfill_zeropage_pte()
221 				struct vm_area_struct *dst_vma,  in mcontinue_atomic_pte()  argument
225 	struct inode *inode = file_inode(dst_vma->vm_file);  in mcontinue_atomic_pte()
226 	pgoff_t pgoff = linear_page_index(dst_vma, dst_addr);  in mcontinue_atomic_pte()
238 	ret = mfill_atomic_install_pte(dst_mm, dst_pmd, dst_vma, dst_addr,  in mcontinue_atomic_pte()
280 					      struct vm_area_struct *dst_vma,  in __mcopy_atomic_hugetlb()  argument
286 	int vm_alloc_shared = dst_vma->vm_flags & VM_SHARED;  in __mcopy_atomic_hugetlb()
287 	int vm_shared = dst_vma->vm_flags & VM_SHARED;  in __mcopy_atomic_hugetlb()
313 	vma_hpagesize = vma_kernel_pagesize(dst_vma);  in __mcopy_atomic_hugetlb()
327 	if (!dst_vma) {  in __mcopy_atomic_hugetlb()
329 		dst_vma = find_dst_vma(dst_mm, dst_start, len);  in __mcopy_atomic_hugetlb()
330 		if (!dst_vma || !is_vm_hugetlb_page(dst_vma))  in __mcopy_atomic_hugetlb()
334 		if (vma_hpagesize != vma_kernel_pagesize(dst_vma))  in __mcopy_atomic_hugetlb()
337 		vm_shared = dst_vma->vm_flags & VM_SHARED;  in __mcopy_atomic_hugetlb()
345 		if (unlikely(anon_vma_prepare(dst_vma)))  in __mcopy_atomic_hugetlb()
358 		mapping = dst_vma->vm_file->f_mapping;  in __mcopy_atomic_hugetlb()
360 		idx = linear_page_index(dst_vma, dst_addr);  in __mcopy_atomic_hugetlb()
365 		dst_pte = huge_pte_alloc(dst_mm, dst_vma, dst_addr, vma_hpagesize);  in __mcopy_atomic_hugetlb()
380 		err = hugetlb_mcopy_atomic_pte(dst_mm, dst_pte, dst_vma,  in __mcopy_atomic_hugetlb()
403 			dst_vma = NULL;  in __mcopy_atomic_hugetlb()
479 				      struct vm_area_struct *dst_vma,
488 						struct vm_area_struct *dst_vma,  in mfill_atomic_pte()  argument
498 		return mcontinue_atomic_pte(dst_mm, dst_pmd, dst_vma, dst_addr,  in mfill_atomic_pte()
512 	if (!(dst_vma->vm_flags & VM_SHARED)) {  in mfill_atomic_pte()
514 			err = mcopy_atomic_pte(dst_mm, dst_pmd, dst_vma,  in mfill_atomic_pte()
519 						 dst_vma, dst_addr);  in mfill_atomic_pte()
522 		err = shmem_mfill_atomic_pte(dst_mm, dst_pmd, dst_vma,  in mfill_atomic_pte()
539 	struct vm_area_struct *dst_vma;  in __mcopy_atomic()  local
578 	dst_vma = find_dst_vma(dst_mm, dst_start, len);  in __mcopy_atomic()
579 	if (!dst_vma)  in __mcopy_atomic()
587 	if (WARN_ON_ONCE(vma_is_anonymous(dst_vma) &&  in __mcopy_atomic()
588 	    dst_vma->vm_flags & VM_SHARED))  in __mcopy_atomic()
596 	if (wp_copy && !(dst_vma->vm_flags & VM_UFFD_WP))  in __mcopy_atomic()
602 	if (is_vm_hugetlb_page(dst_vma))  in __mcopy_atomic()
603 		return  __mcopy_atomic_hugetlb(dst_mm, dst_vma, dst_start,  in __mcopy_atomic()
606 	if (!vma_is_anonymous(dst_vma) && !vma_is_shmem(dst_vma))  in __mcopy_atomic()
608 	if (!vma_is_shmem(dst_vma) && mcopy_mode == MCOPY_ATOMIC_CONTINUE)  in __mcopy_atomic()
617 	if (!(dst_vma->vm_flags & VM_SHARED) &&  in __mcopy_atomic()
618 	    unlikely(anon_vma_prepare(dst_vma)))  in __mcopy_atomic()
655 		err = mfill_atomic_pte(dst_mm, dst_pmd, dst_vma, dst_addr,  in __mcopy_atomic()
727 	struct vm_area_struct *dst_vma;  in mwriteprotect_range()  local
752 	dst_vma = find_dst_vma(dst_mm, start, len);  in mwriteprotect_range()
757 	if (!dst_vma || (dst_vma->vm_flags & VM_SHARED))  in mwriteprotect_range()
759 	if (!userfaultfd_wp(dst_vma))  in mwriteprotect_range()
761 	if (!vma_is_anonymous(dst_vma))  in mwriteprotect_range()
765 		newprot = vm_get_page_prot(dst_vma->vm_flags & ~(VM_WRITE));  in mwriteprotect_range()
767 		newprot = vm_get_page_prot(dst_vma->vm_flags);  in mwriteprotect_range()
769 	change_protection(dst_vma, start, start + len, newprot,  in mwriteprotect_range()