2576 static int lock_page_maybe_drop_mmap(struct vm_fault *vmf, struct page *page,  in lock_page_maybe_drop_mmap()  argument
2587 	if (vmf->flags & FAULT_FLAG_RETRY_NOWAIT)  in lock_page_maybe_drop_mmap()
2590 	*fpin = maybe_unlock_mmap_for_io(vmf, *fpin);  in lock_page_maybe_drop_mmap()
2591 	if (vmf->flags & FAULT_FLAG_KILLABLE) {  in lock_page_maybe_drop_mmap()
2600 				mmap_read_unlock(vmf->vma->vm_mm);  in lock_page_maybe_drop_mmap()
2616 static struct file *do_sync_mmap_readahead(struct vm_fault *vmf)  in do_sync_mmap_readahead()  argument
2618 	struct file *file = vmf->vma->vm_file;  in do_sync_mmap_readahead()
2621 	DEFINE_READAHEAD(ractl, file, mapping, vmf->pgoff);  in do_sync_mmap_readahead()
2626 	if (vmf->vma->vm_flags & VM_RAND_READ)  in do_sync_mmap_readahead()
2631 	if (vmf->vma->vm_flags & VM_SEQ_READ) {  in do_sync_mmap_readahead()
2632 		fpin = maybe_unlock_mmap_for_io(vmf, fpin);  in do_sync_mmap_readahead()
2652 	fpin = maybe_unlock_mmap_for_io(vmf, fpin);  in do_sync_mmap_readahead()
2653 	ra->start = max_t(long, 0, vmf->pgoff - ra->ra_pages / 2);  in do_sync_mmap_readahead()
2666 static struct file *do_async_mmap_readahead(struct vm_fault *vmf,  in do_async_mmap_readahead()  argument
2669 	struct file *file = vmf->vma->vm_file;  in do_async_mmap_readahead()
2674 	pgoff_t offset = vmf->pgoff;  in do_async_mmap_readahead()
2677 	if (vmf->vma->vm_flags & VM_RAND_READ || !ra->ra_pages)  in do_async_mmap_readahead()
2683 		fpin = maybe_unlock_mmap_for_io(vmf, fpin);  in do_async_mmap_readahead()
2713 vm_fault_t filemap_fault(struct vm_fault *vmf)  in filemap_fault()  argument
2716 	struct file *file = vmf->vma->vm_file;  in filemap_fault()
2721 	pgoff_t offset = vmf->pgoff;  in filemap_fault()
2734 	if (likely(page) && !(vmf->flags & FAULT_FLAG_TRIED)) {  in filemap_fault()
2739 		fpin = do_async_mmap_readahead(vmf, page);  in filemap_fault()
2743 		count_memcg_event_mm(vmf->vma->vm_mm, PGMAJFAULT);  in filemap_fault()
2745 		fpin = do_sync_mmap_readahead(vmf);  in filemap_fault()
2749 					  vmf->gfp_mask);  in filemap_fault()
2757 	if (!lock_page_maybe_drop_mmap(vmf, page, &fpin))  in filemap_fault()
2796 	vmf->page = page;  in filemap_fault()
2807 	fpin = maybe_unlock_mmap_for_io(vmf, fpin);  in filemap_fault()
2838 void filemap_map_pages(struct vm_fault *vmf,  in filemap_map_pages()  argument
2841 	struct file *file = vmf->vma->vm_file;  in filemap_map_pages()
2887 		vmf->address += (xas.xa_index - last_pgoff) << PAGE_SHIFT;  in filemap_map_pages()
2888 		if (vmf->pte)  in filemap_map_pages()
2889 			vmf->pte += xas.xa_index - last_pgoff;  in filemap_map_pages()
2891 		if (alloc_set_pte(vmf, page))  in filemap_map_pages()
2901 		if (pmd_trans_huge(*vmf->pmd))  in filemap_map_pages()
2909 vm_fault_t filemap_page_mkwrite(struct vm_fault *vmf)  in filemap_page_mkwrite()  argument
2911 	struct page *page = vmf->page;  in filemap_page_mkwrite()
2912 	struct inode *inode = file_inode(vmf->vma->vm_file);  in filemap_page_mkwrite()
2916 	file_update_time(vmf->vma->vm_file);  in filemap_page_mkwrite()
2964 vm_fault_t filemap_page_mkwrite(struct vm_fault *vmf)  in filemap_page_mkwrite()  argument