fscrypt: clean up after fscrypt_prepare_lookup() conversions

Now that all filesystems have been converted to use
fscrypt_prepare_lookup(), we can remove the fscrypt_set_d_op() and
fscrypt_set_encrypted_dentry() functions as well as un-export
fscrypt_d_ops.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

fs/crypto/crypto.c

@@ -353,7 +353,6 @@ static int fscrypt_d_revalidate(struct dentry *dentry, unsigned int flags)
 const struct dentry_operations fscrypt_d_ops = {
 	.d_revalidate = fscrypt_d_revalidate,
 };
-EXPORT_SYMBOL(fscrypt_d_ops);
 
 void fscrypt_restore_control_page(struct page *page)
 {

fs/crypto/fscrypt_private.h

@@ -106,6 +106,7 @@ extern int fscrypt_do_page_crypto(const struct inode *inode,
 				  gfp_t gfp_flags);
 extern struct page *fscrypt_alloc_bounce_page(struct fscrypt_ctx *ctx,
 					      gfp_t gfp_flags);
+extern const struct dentry_operations fscrypt_d_ops;
 
 /* fname.c */
 extern int fname_encrypt(struct inode *inode, const struct qstr *iname,

include/linux/fscrypt_notsupp.h

@@ -64,16 +64,6 @@ static inline void fscrypt_restore_control_page(struct page *page)
 	return;
 }
 
-static inline void fscrypt_set_d_op(struct dentry *dentry)
-{
-	return;
-}
-
-static inline void fscrypt_set_encrypted_dentry(struct dentry *dentry)
-{
-	return;
-}
-
 /* policy.c */
 static inline int fscrypt_ioctl_set_policy(struct file *filp,
 					   const void __user *arg)

include/linux/fscrypt_supp.h

@@ -74,20 +74,6 @@ static inline struct page *fscrypt_control_page(struct page *page)
 
 extern void fscrypt_restore_control_page(struct page *);
 
-extern const struct dentry_operations fscrypt_d_ops;
-
-static inline void fscrypt_set_d_op(struct dentry *dentry)
-{
-	d_set_d_op(dentry, &fscrypt_d_ops);
-}
-
-static inline void fscrypt_set_encrypted_dentry(struct dentry *dentry)
-{
-	spin_lock(&dentry->d_lock);
-	dentry->d_flags |= DCACHE_ENCRYPTED_WITH_KEY;
-	spin_unlock(&dentry->d_lock);
-}
-
 /* policy.c */
 extern int fscrypt_ioctl_set_policy(struct file *, const void __user *);
 extern int fscrypt_ioctl_get_policy(struct file *, void __user *);