AFS: Don't put struct file on the stack
Don't put struct file on the stack as it takes up quite a lot of space
and violates lifetime rules for struct file.
Rather than calling afs_readpage() indirectly from the directory routines by
way of read_mapping_page(), split afs_readpage() to have afs_page_filler()
that's given a key instead of a file and call read_cache_page(), specifying the
new function directly. Use it in afs_readpages() as well.
Also make use of this in afs_mntpt_check_symlink() too for the same reason.
Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David Howells <dhowells@redhat.com>
diff --git a/fs/afs/mntpt.c b/fs/afs/mntpt.c
index b3feddc..a9e2303 100644
--- a/fs/afs/mntpt.c
+++ b/fs/afs/mntpt.c
@@ -49,9 +49,6 @@
*/
int afs_mntpt_check_symlink(struct afs_vnode *vnode, struct key *key)
{
- struct file file = {
- .private_data = key,
- };
struct page *page;
size_t size;
char *buf;
@@ -61,7 +58,8 @@
vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique);
/* read the contents of the symlink into the pagecache */
- page = read_mapping_page(AFS_VNODE_TO_I(vnode)->i_mapping, 0, &file);
+ page = read_cache_page(AFS_VNODE_TO_I(vnode)->i_mapping, 0,
+ afs_page_filler, key);
if (IS_ERR(page)) {
ret = PTR_ERR(page);
goto out;