* ->i_mutex (generic_file_buffered_write)
* ->mmap_sem (fault_in_pages_readable->do_page_fault)
*
- * ->i_mutex
- * ->i_alloc_sem (various)
- *
* bdi->wb.list_lock
* sb_lock (fs/fs-writeback.c)
* ->mapping->tree_lock (__sync_single_inode)
radix_tree_delete(&mapping->page_tree, page->index);
page->mapping = NULL;
+ /* Leave page->index set: truncation lookup relies upon it */
mapping->nrpages--;
__dec_zone_page_state(page, NR_FILE_PAGES);
if (PageSwapBacked(page))
spin_unlock_irq(&mapping->tree_lock);
} else {
page->mapping = NULL;
+ /* Leave page->index set: truncation relies upon it */
spin_unlock_irq(&mapping->tree_lock);
mem_cgroup_uncharge_cache_page(page);
page_cache_release(page);
static struct page *__read_cache_page(struct address_space *mapping,
pgoff_t index,
- int (*filler)(void *,struct page*),
+ int (*filler)(void *, struct page *),
void *data,
gfp_t gfp)
{
static struct page *do_read_cache_page(struct address_space *mapping,
pgoff_t index,
- int (*filler)(void *,struct page*),
+ int (*filler)(void *, struct page *),
void *data,
gfp_t gfp)
* @mapping: the page's address_space
* @index: the page index
* @filler: function to perform the read
- * @data: destination for read data
+ * @data: first arg to filler(data, page) function, often left as NULL
*
* Same as read_cache_page, but don't wait for page to become unlocked
* after submitting it to the filler.
*/
struct page *read_cache_page_async(struct address_space *mapping,
pgoff_t index,
- int (*filler)(void *,struct page*),
+ int (*filler)(void *, struct page *),
void *data)
{
return do_read_cache_page(mapping, index, filler, data, mapping_gfp_mask(mapping));
* @mapping: the page's address_space
* @index: the page index
* @filler: function to perform the read
- * @data: destination for read data
+ * @data: first arg to filler(data, page) function, often left as NULL
*
* Read into the page cache. If a page already exists, and PageUptodate() is
* not set, try to fill the page then wait for it to become unlocked.
*/
struct page *read_cache_page(struct address_space *mapping,
pgoff_t index,
- int (*filler)(void *,struct page*),
+ int (*filler)(void *, struct page *),
void *data)
{
return wait_on_page_read(read_cache_page_async(mapping, index, filler, data));
error = security_inode_killpriv(dentry);
if (!error && killsuid)
error = __remove_suid(dentry, killsuid);
- if (!error)
+ if (!error && (inode->i_sb->s_flags & MS_NOSEC))
inode->i_flags |= S_NOSEC;
return error;