30 static inline void dir_put_page(struct page *page)  in dir_put_page()  argument
32 	kunmap(page);  in dir_put_page()
33 	page_cache_release(page);  in dir_put_page()
41 static int dir_commit_chunk(struct page *page, loff_t pos, unsigned len)  in dir_commit_chunk()  argument
43 	struct address_space *mapping = page->mapping;  in dir_commit_chunk()
47 	block_write_end(NULL, mapping, pos, len, len, page, NULL);  in dir_commit_chunk()
53 		err = write_one_page(page, 1);  in dir_commit_chunk()
55 		unlock_page(page);  in dir_commit_chunk()
59 static struct page * dir_get_page(struct inode *dir, unsigned long n)  in dir_get_page()
62 	struct page *page = read_mapping_page(mapping, n, NULL);  in dir_get_page()  local
63 	if (!IS_ERR(page))  in dir_get_page()
64 		kmap(page);  in dir_get_page()
65 	return page;  in dir_get_page()
87 		struct page *page = dir_get_page(inode, n);  in sysv_readdir()  local
89 		if (IS_ERR(page))  in sysv_readdir()
91 		kaddr = (char *)page_address(page);  in sysv_readdir()
103 				dir_put_page(page);  in sysv_readdir()
107 		dir_put_page(page);  in sysv_readdir()
131 struct sysv_dir_entry *sysv_find_entry(struct dentry *dentry, struct page **res_page)  in sysv_find_entry()
138 	struct page *page = NULL;  in sysv_find_entry()  local
150 		page = dir_get_page(dir, n);  in sysv_find_entry()
151 		if (!IS_ERR(page)) {  in sysv_find_entry()
152 			kaddr = (char*)page_address(page);  in sysv_find_entry()
162 			dir_put_page(page);  in sysv_find_entry()
173 	*res_page = page;  in sysv_find_entry()
182 	struct page *page = NULL;  in sysv_add_link()  local
192 		page = dir_get_page(dir, n);  in sysv_add_link()
193 		err = PTR_ERR(page);  in sysv_add_link()
194 		if (IS_ERR(page))  in sysv_add_link()
196 		kaddr = (char*)page_address(page);  in sysv_add_link()
207 		dir_put_page(page);  in sysv_add_link()
213 	pos = page_offset(page) +  in sysv_add_link()
214 			(char*)de - (char*)page_address(page);  in sysv_add_link()
215 	lock_page(page);  in sysv_add_link()
216 	err = sysv_prepare_chunk(page, pos, SYSV_DIRSIZE);  in sysv_add_link()
222 	err = dir_commit_chunk(page, pos, SYSV_DIRSIZE);  in sysv_add_link()
226 	dir_put_page(page);  in sysv_add_link()
230 	unlock_page(page);  in sysv_add_link()
234 int sysv_delete_entry(struct sysv_dir_entry *de, struct page *page)  in sysv_delete_entry()  argument
236 	struct inode *inode = page->mapping->host;  in sysv_delete_entry()
237 	char *kaddr = (char*)page_address(page);  in sysv_delete_entry()
238 	loff_t pos = page_offset(page) + (char *)de - kaddr;  in sysv_delete_entry()
241 	lock_page(page);  in sysv_delete_entry()
242 	err = sysv_prepare_chunk(page, pos, SYSV_DIRSIZE);  in sysv_delete_entry()
245 	err = dir_commit_chunk(page, pos, SYSV_DIRSIZE);  in sysv_delete_entry()
246 	dir_put_page(page);  in sysv_delete_entry()
254 	struct page *page = grab_cache_page(inode->i_mapping, 0);  in sysv_make_empty()  local
259 	if (!page)  in sysv_make_empty()
261 	err = sysv_prepare_chunk(page, 0, 2 * SYSV_DIRSIZE);  in sysv_make_empty()
263 		unlock_page(page);  in sysv_make_empty()
266 	kmap(page);  in sysv_make_empty()
268 	base = (char*)page_address(page);  in sysv_make_empty()
278 	kunmap(page);  in sysv_make_empty()
279 	err = dir_commit_chunk(page, 0, 2 * SYSV_DIRSIZE);  in sysv_make_empty()
281 	page_cache_release(page);  in sysv_make_empty()
291 	struct page *page = NULL;  in sysv_empty_dir()  local
297 		page = dir_get_page(inode, i);  in sysv_empty_dir()
299 		if (IS_ERR(page))  in sysv_empty_dir()
302 		kaddr = (char *)page_address(page);  in sysv_empty_dir()
321 		dir_put_page(page);  in sysv_empty_dir()
326 	dir_put_page(page);  in sysv_empty_dir()
331 void sysv_set_link(struct sysv_dir_entry *de, struct page *page,  in sysv_set_link()  argument
334 	struct inode *dir = page->mapping->host;  in sysv_set_link()
335 	loff_t pos = page_offset(page) +  in sysv_set_link()
336 			(char *)de-(char*)page_address(page);  in sysv_set_link()
339 	lock_page(page);  in sysv_set_link()
340 	err = sysv_prepare_chunk(page, pos, SYSV_DIRSIZE);  in sysv_set_link()
343 	err = dir_commit_chunk(page, pos, SYSV_DIRSIZE);  in sysv_set_link()
344 	dir_put_page(page);  in sysv_set_link()
349 struct sysv_dir_entry * sysv_dotdot (struct inode *dir, struct page **p)  in sysv_dotdot()
351 	struct page *page = dir_get_page(dir, 0);  in sysv_dotdot()  local
354 	if (!IS_ERR(page)) {  in sysv_dotdot()
355 		de = (struct sysv_dir_entry*) page_address(page) + 1;  in sysv_dotdot()
356 		*p = page;  in sysv_dotdot()
363 	struct page *page;  in sysv_inode_by_name()  local
364 	struct sysv_dir_entry *de = sysv_find_entry (dentry, &page);  in sysv_inode_by_name()
369 		dir_put_page(page);  in sysv_inode_by_name()