31 static inline void dir_put_page(struct page *page)  in dir_put_page()  argument
33 	kunmap(page);  in dir_put_page()
34 	put_page(page);  in dir_put_page()
37 static int dir_commit_chunk(struct page *page, loff_t pos, unsigned len)  in dir_commit_chunk()  argument
39 	struct address_space *mapping = page->mapping;  in dir_commit_chunk()
43 	block_write_end(NULL, mapping, pos, len, len, page, NULL);  in dir_commit_chunk()
49 		err = write_one_page(page);  in dir_commit_chunk()
51 		unlock_page(page);  in dir_commit_chunk()
55 static struct page * dir_get_page(struct inode *dir, unsigned long n)  in dir_get_page()
58 	struct page *page = read_mapping_page(mapping, n, NULL);  in dir_get_page()  local
59 	if (!IS_ERR(page))  in dir_get_page()
60 		kmap(page);  in dir_get_page()
61 	return page;  in dir_get_page()
83 		struct page *page = dir_get_page(inode, n);  in sysv_readdir()  local
85 		if (IS_ERR(page))  in sysv_readdir()
87 		kaddr = (char *)page_address(page);  in sysv_readdir()
99 				dir_put_page(page);  in sysv_readdir()
103 		dir_put_page(page);  in sysv_readdir()
127 struct sysv_dir_entry *sysv_find_entry(struct dentry *dentry, struct page **res_page)  in sysv_find_entry()
134 	struct page *page = NULL;  in sysv_find_entry()  local
146 		page = dir_get_page(dir, n);  in sysv_find_entry()
147 		if (!IS_ERR(page)) {  in sysv_find_entry()
148 			kaddr = (char*)page_address(page);  in sysv_find_entry()
158 			dir_put_page(page);  in sysv_find_entry()
169 	*res_page = page;  in sysv_find_entry()
178 	struct page *page = NULL;  in sysv_add_link()  local
188 		page = dir_get_page(dir, n);  in sysv_add_link()
189 		err = PTR_ERR(page);  in sysv_add_link()
190 		if (IS_ERR(page))  in sysv_add_link()
192 		kaddr = (char*)page_address(page);  in sysv_add_link()
203 		dir_put_page(page);  in sysv_add_link()
209 	pos = page_offset(page) +  in sysv_add_link()
210 			(char*)de - (char*)page_address(page);  in sysv_add_link()
211 	lock_page(page);  in sysv_add_link()
212 	err = sysv_prepare_chunk(page, pos, SYSV_DIRSIZE);  in sysv_add_link()
218 	err = dir_commit_chunk(page, pos, SYSV_DIRSIZE);  in sysv_add_link()
222 	dir_put_page(page);  in sysv_add_link()
226 	unlock_page(page);  in sysv_add_link()
230 int sysv_delete_entry(struct sysv_dir_entry *de, struct page *page)  in sysv_delete_entry()  argument
232 	struct inode *inode = page->mapping->host;  in sysv_delete_entry()
233 	char *kaddr = (char*)page_address(page);  in sysv_delete_entry()
234 	loff_t pos = page_offset(page) + (char *)de - kaddr;  in sysv_delete_entry()
237 	lock_page(page);  in sysv_delete_entry()
238 	err = sysv_prepare_chunk(page, pos, SYSV_DIRSIZE);  in sysv_delete_entry()
241 	err = dir_commit_chunk(page, pos, SYSV_DIRSIZE);  in sysv_delete_entry()
242 	dir_put_page(page);  in sysv_delete_entry()
250 	struct page *page = grab_cache_page(inode->i_mapping, 0);  in sysv_make_empty()  local
255 	if (!page)  in sysv_make_empty()
257 	err = sysv_prepare_chunk(page, 0, 2 * SYSV_DIRSIZE);  in sysv_make_empty()
259 		unlock_page(page);  in sysv_make_empty()
262 	kmap(page);  in sysv_make_empty()
264 	base = (char*)page_address(page);  in sysv_make_empty()
274 	kunmap(page);  in sysv_make_empty()
275 	err = dir_commit_chunk(page, 0, 2 * SYSV_DIRSIZE);  in sysv_make_empty()
277 	put_page(page);  in sysv_make_empty()
287 	struct page *page = NULL;  in sysv_empty_dir()  local
293 		page = dir_get_page(inode, i);  in sysv_empty_dir()
295 		if (IS_ERR(page))  in sysv_empty_dir()
298 		kaddr = (char *)page_address(page);  in sysv_empty_dir()
317 		dir_put_page(page);  in sysv_empty_dir()
322 	dir_put_page(page);  in sysv_empty_dir()
327 void sysv_set_link(struct sysv_dir_entry *de, struct page *page,  in sysv_set_link()  argument
330 	struct inode *dir = page->mapping->host;  in sysv_set_link()
331 	loff_t pos = page_offset(page) +  in sysv_set_link()
332 			(char *)de-(char*)page_address(page);  in sysv_set_link()
335 	lock_page(page);  in sysv_set_link()
336 	err = sysv_prepare_chunk(page, pos, SYSV_DIRSIZE);  in sysv_set_link()
339 	err = dir_commit_chunk(page, pos, SYSV_DIRSIZE);  in sysv_set_link()
340 	dir_put_page(page);  in sysv_set_link()
345 struct sysv_dir_entry * sysv_dotdot (struct inode *dir, struct page **p)  in sysv_dotdot()
347 	struct page *page = dir_get_page(dir, 0);  in sysv_dotdot()  local
350 	if (!IS_ERR(page)) {  in sysv_dotdot()
351 		de = (struct sysv_dir_entry*) page_address(page) + 1;  in sysv_dotdot()
352 		*p = page;  in sysv_dotdot()
359 	struct page *page;  in sysv_inode_by_name()  local
360 	struct sysv_dir_entry *de = sysv_find_entry (dentry, &page);  in sysv_inode_by_name()
365 		dir_put_page(page);  in sysv_inode_by_name()