28 static inline void dir_put_page(struct page *page)  in dir_put_page()  argument
30 	kunmap(page);  in dir_put_page()
31 	page_cache_release(page);  in dir_put_page()
53 static int dir_commit_chunk(struct page *page, loff_t pos, unsigned len)  in dir_commit_chunk()  argument
55 	struct address_space *mapping = page->mapping;  in dir_commit_chunk()
58 	block_write_end(NULL, mapping, pos, len, len, page, NULL);  in dir_commit_chunk()
65 		err = write_one_page(page, 1);  in dir_commit_chunk()
67 		unlock_page(page);  in dir_commit_chunk()
71 static struct page * dir_get_page(struct inode *dir, unsigned long n)  in dir_get_page()
74 	struct page *page = read_mapping_page(mapping, n, NULL);  in dir_get_page()  local
75 	if (!IS_ERR(page))  in dir_get_page()
76 		kmap(page);  in dir_get_page()
77 	return page;  in dir_get_page()
105 		struct page *page = dir_get_page(inode, n);  in minix_readdir()  local
107 		if (IS_ERR(page))  in minix_readdir()
109 		kaddr = (char *)page_address(page);  in minix_readdir()
128 					dir_put_page(page);  in minix_readdir()
134 		dir_put_page(page);  in minix_readdir()
155 minix_dirent *minix_find_entry(struct dentry *dentry, struct page **res_page)  in minix_find_entry()
164 	struct page *page = NULL;  in minix_find_entry()  local
174 		page = dir_get_page(dir, n);  in minix_find_entry()
175 		if (IS_ERR(page))  in minix_find_entry()
178 		kaddr = (char*)page_address(page);  in minix_find_entry()
195 		dir_put_page(page);  in minix_find_entry()
200 	*res_page = page;  in minix_find_entry()
211 	struct page *page = NULL;  in minix_add_link()  local
230 		page = dir_get_page(dir, n);  in minix_add_link()
231 		err = PTR_ERR(page);  in minix_add_link()
232 		if (IS_ERR(page))  in minix_add_link()
234 		lock_page(page);  in minix_add_link()
235 		kaddr = (char*)page_address(page);  in minix_add_link()
262 		unlock_page(page);  in minix_add_link()
263 		dir_put_page(page);  in minix_add_link()
269 	pos = page_offset(page) + p - (char *)page_address(page);  in minix_add_link()
270 	err = minix_prepare_chunk(page, pos, sbi->s_dirsize);  in minix_add_link()
281 	err = dir_commit_chunk(page, pos, sbi->s_dirsize);  in minix_add_link()
285 	dir_put_page(page);  in minix_add_link()
289 	unlock_page(page);  in minix_add_link()
293 int minix_delete_entry(struct minix_dir_entry *de, struct page *page)  in minix_delete_entry()  argument
295 	struct inode *inode = page->mapping->host;  in minix_delete_entry()
296 	char *kaddr = page_address(page);  in minix_delete_entry()
297 	loff_t pos = page_offset(page) + (char*)de - kaddr;  in minix_delete_entry()
302 	lock_page(page);  in minix_delete_entry()
303 	err = minix_prepare_chunk(page, pos, len);  in minix_delete_entry()
309 		err = dir_commit_chunk(page, pos, len);  in minix_delete_entry()
311 		unlock_page(page);  in minix_delete_entry()
313 	dir_put_page(page);  in minix_delete_entry()
321 	struct page *page = grab_cache_page(inode->i_mapping, 0);  in minix_make_empty()  local
326 	if (!page)  in minix_make_empty()
328 	err = minix_prepare_chunk(page, 0, 2 * sbi->s_dirsize);  in minix_make_empty()
330 		unlock_page(page);  in minix_make_empty()
334 	kaddr = kmap_atomic(page);  in minix_make_empty()
356 	err = dir_commit_chunk(page, 0, 2 * sbi->s_dirsize);  in minix_make_empty()
358 	page_cache_release(page);  in minix_make_empty()
367 	struct page *page = NULL;  in minix_empty_dir()  local
376 		page = dir_get_page(inode, i);  in minix_empty_dir()
377 		if (IS_ERR(page))  in minix_empty_dir()
380 		kaddr = (char *)page_address(page);  in minix_empty_dir()
406 		dir_put_page(page);  in minix_empty_dir()
411 	dir_put_page(page);  in minix_empty_dir()
416 void minix_set_link(struct minix_dir_entry *de, struct page *page,  in minix_set_link()  argument
419 	struct inode *dir = page->mapping->host;  in minix_set_link()
421 	loff_t pos = page_offset(page) +  in minix_set_link()
422 			(char *)de-(char*)page_address(page);  in minix_set_link()
425 	lock_page(page);  in minix_set_link()
427 	err = minix_prepare_chunk(page, pos, sbi->s_dirsize);  in minix_set_link()
433 		err = dir_commit_chunk(page, pos, sbi->s_dirsize);  in minix_set_link()
435 		unlock_page(page);  in minix_set_link()
437 	dir_put_page(page);  in minix_set_link()
442 struct minix_dir_entry * minix_dotdot (struct inode *dir, struct page **p)  in minix_dotdot()
444 	struct page *page = dir_get_page(dir, 0);  in minix_dotdot()  local
448 	if (!IS_ERR(page)) {  in minix_dotdot()
449 		de = minix_next_entry(page_address(page), sbi);  in minix_dotdot()
450 		*p = page;  in minix_dotdot()
457 	struct page *page;  in minix_inode_by_name()  local
458 	struct minix_dir_entry *de = minix_find_entry(dentry, &page);  in minix_inode_by_name()
462 		struct address_space *mapping = page->mapping;  in minix_inode_by_name()
470 		dir_put_page(page);  in minix_inode_by_name()