864 	struct nullb_page *t_page;  in null_alloc_page()  local
866 	t_page = kmalloc(sizeof(struct nullb_page), GFP_NOIO);  in null_alloc_page()
867 	if (!t_page)  in null_alloc_page()
870 	t_page->page = alloc_pages(GFP_NOIO, 0);  in null_alloc_page()
871 	if (!t_page->page) {  in null_alloc_page()
872 		kfree(t_page);  in null_alloc_page()
876 	memset(t_page->bitmap, 0, sizeof(t_page->bitmap));  in null_alloc_page()
877 	return t_page;  in null_alloc_page()
880 static void null_free_page(struct nullb_page *t_page)  in null_free_page()  argument
882 	__set_bit(NULLB_PAGE_FREE, t_page->bitmap);  in null_free_page()
883 	if (test_bit(NULLB_PAGE_LOCK, t_page->bitmap))  in null_free_page()
885 	__free_page(t_page->page);  in null_free_page()
886 	kfree(t_page);  in null_free_page()
901 	struct nullb_page *t_page, *ret;  in null_free_sector()  local
908 	t_page = radix_tree_lookup(root, idx);  in null_free_sector()
909 	if (t_page) {  in null_free_sector()
910 		__clear_bit(sector_bit, t_page->bitmap);  in null_free_sector()
912 		if (null_page_empty(t_page)) {  in null_free_sector()
913 			ret = radix_tree_delete_item(root, idx, t_page);  in null_free_sector()
914 			WARN_ON(ret != t_page);  in null_free_sector()
923 	struct nullb_page *t_page, bool is_cache)  in null_radix_tree_insert()  argument
929 	if (radix_tree_insert(root, idx, t_page)) {  in null_radix_tree_insert()
930 		null_free_page(t_page);  in null_radix_tree_insert()
931 		t_page = radix_tree_lookup(root, idx);  in null_radix_tree_insert()
932 		WARN_ON(!t_page || t_page->page->index != idx);  in null_radix_tree_insert()
936 	return t_page;  in null_radix_tree_insert()
973 	struct nullb_page *t_page;  in __null_lookup_page()  local
980 	t_page = radix_tree_lookup(root, idx);  in __null_lookup_page()
981 	WARN_ON(t_page && t_page->page->index != idx);  in __null_lookup_page()
983 	if (t_page && (for_write || test_bit(sector_bit, t_page->bitmap)))  in __null_lookup_page()
984 		return t_page;  in __null_lookup_page()
1007 	struct nullb_page *t_page;  in null_insert_page()  local
1009 	t_page = null_lookup_page(nullb, sector, true, ignore_cache);  in null_insert_page()
1010 	if (t_page)  in null_insert_page()
1011 		return t_page;  in null_insert_page()
1015 	t_page = null_alloc_page();  in null_insert_page()
1016 	if (!t_page)  in null_insert_page()
1024 	t_page->page->index = idx;  in null_insert_page()
1025 	t_page = null_radix_tree_insert(nullb, idx, t_page, !ignore_cache);  in null_insert_page()
1028 	return t_page;  in null_insert_page()
1030 	null_free_page(t_page);  in null_insert_page()
1041 	struct nullb_page *t_page, *ret;  in null_flush_cache_page()  local
1046 	t_page = null_insert_page(nullb, idx << PAGE_SECTORS_SHIFT, true);  in null_flush_cache_page()
1051 		if (t_page && null_page_empty(t_page)) {  in null_flush_cache_page()
1053 				idx, t_page);  in null_flush_cache_page()
1054 			null_free_page(t_page);  in null_flush_cache_page()
1059 	if (!t_page)  in null_flush_cache_page()
1063 	dst = kmap_local_page(t_page->page);  in null_flush_cache_page()
1071 			__set_bit(i, t_page->bitmap);  in null_flush_cache_page()
1143 	struct nullb_page *t_page;  in copy_to_nullb()  local
1152 		t_page = null_insert_page(nullb, sector,  in copy_to_nullb()
1154 		if (!t_page)  in copy_to_nullb()
1157 		memcpy_page(t_page->page, offset, source, off + count, temp);  in copy_to_nullb()
1159 		__set_bit(sector & SECTOR_MASK, t_page->bitmap);  in copy_to_nullb()
1175 	struct nullb_page *t_page;  in copy_from_nullb()  local
1181 		t_page = null_lookup_page(nullb, sector, false,  in copy_from_nullb()
1184 		if (t_page)  in copy_from_nullb()
1185 			memcpy_page(dest, off + count, t_page->page, offset,  in copy_from_nullb()