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()
36 static int dir_commit_chunk(struct page *page, loff_t pos, unsigned len)  in dir_commit_chunk()  argument
38 	struct address_space *mapping = page->mapping;  in dir_commit_chunk()
42 	block_write_end(NULL, mapping, pos, len, len, page, NULL);  in dir_commit_chunk()
48 		err = write_one_page(page, 1);  in dir_commit_chunk()
50 		unlock_page(page);  in dir_commit_chunk()
54 static struct page * dir_get_page(struct inode *dir, unsigned long n)  in dir_get_page()
57 	struct page *page = read_mapping_page(mapping, n, NULL);  in dir_get_page()  local
58 	if (!IS_ERR(page))  in dir_get_page()
59 		kmap(page);  in dir_get_page()
60 	return page;  in dir_get_page()
82 		struct page *page = dir_get_page(inode, n);  in sysv_readdir()  local
84 		if (IS_ERR(page))  in sysv_readdir()
86 		kaddr = (char *)page_address(page);  in sysv_readdir()
98 				dir_put_page(page);  in sysv_readdir()
102 		dir_put_page(page);  in sysv_readdir()
126 struct sysv_dir_entry *sysv_find_entry(struct dentry *dentry, struct page **res_page)  in sysv_find_entry()
133 	struct page *page = NULL;  in sysv_find_entry()  local
145 		page = dir_get_page(dir, n);  in sysv_find_entry()
146 		if (!IS_ERR(page)) {  in sysv_find_entry()
147 			kaddr = (char*)page_address(page);  in sysv_find_entry()
157 			dir_put_page(page);  in sysv_find_entry()
168 	*res_page = page;  in sysv_find_entry()
177 	struct page *page = NULL;  in sysv_add_link()  local
187 		page = dir_get_page(dir, n);  in sysv_add_link()
188 		err = PTR_ERR(page);  in sysv_add_link()
189 		if (IS_ERR(page))  in sysv_add_link()
191 		kaddr = (char*)page_address(page);  in sysv_add_link()
202 		dir_put_page(page);  in sysv_add_link()
208 	pos = page_offset(page) +  in sysv_add_link()
209 			(char*)de - (char*)page_address(page);  in sysv_add_link()
210 	lock_page(page);  in sysv_add_link()
211 	err = sysv_prepare_chunk(page, pos, SYSV_DIRSIZE);  in sysv_add_link()
217 	err = dir_commit_chunk(page, pos, SYSV_DIRSIZE);  in sysv_add_link()
221 	dir_put_page(page);  in sysv_add_link()
225 	unlock_page(page);  in sysv_add_link()
229 int sysv_delete_entry(struct sysv_dir_entry *de, struct page *page)  in sysv_delete_entry()  argument
231 	struct inode *inode = page->mapping->host;  in sysv_delete_entry()
232 	char *kaddr = (char*)page_address(page);  in sysv_delete_entry()
233 	loff_t pos = page_offset(page) + (char *)de - kaddr;  in sysv_delete_entry()
236 	lock_page(page);  in sysv_delete_entry()
237 	err = sysv_prepare_chunk(page, pos, SYSV_DIRSIZE);  in sysv_delete_entry()
240 	err = dir_commit_chunk(page, pos, SYSV_DIRSIZE);  in sysv_delete_entry()
241 	dir_put_page(page);  in sysv_delete_entry()
249 	struct page *page = grab_cache_page(inode->i_mapping, 0);  in sysv_make_empty()  local
254 	if (!page)  in sysv_make_empty()
256 	err = sysv_prepare_chunk(page, 0, 2 * SYSV_DIRSIZE);  in sysv_make_empty()
258 		unlock_page(page);  in sysv_make_empty()
261 	kmap(page);  in sysv_make_empty()
263 	base = (char*)page_address(page);  in sysv_make_empty()
273 	kunmap(page);  in sysv_make_empty()
274 	err = dir_commit_chunk(page, 0, 2 * SYSV_DIRSIZE);  in sysv_make_empty()
276 	page_cache_release(page);  in sysv_make_empty()
286 	struct page *page = NULL;  in sysv_empty_dir()  local
292 		page = dir_get_page(inode, i);  in sysv_empty_dir()
294 		if (IS_ERR(page))  in sysv_empty_dir()
297 		kaddr = (char *)page_address(page);  in sysv_empty_dir()
316 		dir_put_page(page);  in sysv_empty_dir()
321 	dir_put_page(page);  in sysv_empty_dir()
326 void sysv_set_link(struct sysv_dir_entry *de, struct page *page,  in sysv_set_link()  argument
329 	struct inode *dir = page->mapping->host;  in sysv_set_link()
330 	loff_t pos = page_offset(page) +  in sysv_set_link()
331 			(char *)de-(char*)page_address(page);  in sysv_set_link()
334 	lock_page(page);  in sysv_set_link()
335 	err = sysv_prepare_chunk(page, pos, SYSV_DIRSIZE);  in sysv_set_link()
338 	err = dir_commit_chunk(page, pos, SYSV_DIRSIZE);  in sysv_set_link()
339 	dir_put_page(page);  in sysv_set_link()
344 struct sysv_dir_entry * sysv_dotdot (struct inode *dir, struct page **p)  in sysv_dotdot()
346 	struct page *page = dir_get_page(dir, 0);  in sysv_dotdot()  local
349 	if (!IS_ERR(page)) {  in sysv_dotdot()
350 		de = (struct sysv_dir_entry*) page_address(page) + 1;  in sysv_dotdot()
351 		*p = page;  in sysv_dotdot()
358 	struct page *page;  in sysv_inode_by_name()  local
359 	struct sysv_dir_entry *de = sysv_find_entry (dentry, &page);  in sysv_inode_by_name()
364 		dir_put_page(page);  in sysv_inode_by_name()