diff --git a/fs/crypto/crypto.c b/fs/crypto/crypto.c
index 7bdb985126d97..2e6fb5e4f7a7f 100644
--- a/fs/crypto/crypto.c
+++ b/fs/crypto/crypto.c
@@ -284,8 +284,7 @@ EXPORT_SYMBOL(fscrypt_encrypt_block_inplace);
 /**
  * fscrypt_decrypt_page() - Decrypts a page in-place
  * @inode:     The corresponding inode for the page to decrypt.
- * @page:      The page to decrypt. Must be locked in case
- *             it is a writeback page (FS_CFLG_OWN_PAGES unset).
+ * @page:      The page to decrypt. Must be locked.
  * @len:       Number of bytes in @page to be decrypted.
  * @offs:      Start of data in @page.
  * @lblk_num:  Logical block number.
@@ -299,8 +298,7 @@ EXPORT_SYMBOL(fscrypt_encrypt_block_inplace);
 int fscrypt_decrypt_page(const struct inode *inode, struct page *page,
 			unsigned int len, unsigned int offs, u64 lblk_num)
 {
-	if (WARN_ON_ONCE(!PageLocked(page) &&
-			 !(inode->i_sb->s_cop->flags & FS_CFLG_OWN_PAGES)))
+	if (WARN_ON_ONCE(!PageLocked(page)))
 		return -EINVAL;
 
 	return fscrypt_crypt_block(inode, FS_DECRYPT, lblk_num, page, page,
@@ -308,6 +306,31 @@ int fscrypt_decrypt_page(const struct inode *inode, struct page *page,
 }
 EXPORT_SYMBOL(fscrypt_decrypt_page);
 
+/**
+ * fscrypt_decrypt_block_inplace() - Decrypt a filesystem block in-place
+ * @inode:     The inode to which this block belongs
+ * @page:      The page containing the block to decrypt
+ * @len:       Size of block to decrypt.  Doesn't need to be a multiple of the
+ *		fs block size, but must be a multiple of FS_CRYPTO_BLOCK_SIZE.
+ * @offs:      Byte offset within @page at which the block to decrypt begins
+ * @lblk_num:  Filesystem logical block number of the block, i.e. the 0-based
+ *		number of the block within the file
+ *
+ * Decrypt a possibly-compressed filesystem block that is located in an
+ * arbitrary page, not necessarily in the original pagecache page.  The @inode
+ * and @lblk_num must be specified, as they can't be determined from @page.
+ *
+ * Return: 0 on success; -errno on failure
+ */
+int fscrypt_decrypt_block_inplace(const struct inode *inode, struct page *page,
+				  unsigned int len, unsigned int offs,
+				  u64 lblk_num)
+{
+	return fscrypt_crypt_block(inode, FS_DECRYPT, lblk_num, page, page,
+				   len, offs, GFP_NOFS);
+}
+EXPORT_SYMBOL(fscrypt_decrypt_block_inplace);
+
 /*
  * Validate dentries in encrypted directories to make sure we aren't potentially
  * caching stale dentries after a key has been added.
diff --git a/fs/ubifs/crypto.c b/fs/ubifs/crypto.c
index 032efdad2e668..22be7aeb96c4f 100644
--- a/fs/ubifs/crypto.c
+++ b/fs/ubifs/crypto.c
@@ -64,10 +64,11 @@ int ubifs_decrypt(const struct inode *inode, struct ubifs_data_node *dn,
 	}
 
 	ubifs_assert(c, dlen <= UBIFS_BLOCK_SIZE);
-	err = fscrypt_decrypt_page(inode, virt_to_page(&dn->data), dlen,
-			offset_in_page(&dn->data), block);
+	err = fscrypt_decrypt_block_inplace(inode, virt_to_page(&dn->data),
+					    dlen, offset_in_page(&dn->data),
+					    block);
 	if (err) {
-		ubifs_err(c, "fscrypt_decrypt_page failed: %i", err);
+		ubifs_err(c, "fscrypt_decrypt_block_inplace() failed: %d", err);
 		return err;
 	}
 	*out_len = clen;
diff --git a/include/linux/fscrypt.h b/include/linux/fscrypt.h
index c7e16bd16a6c2..315affc99b050 100644
--- a/include/linux/fscrypt.h
+++ b/include/linux/fscrypt.h
@@ -114,6 +114,9 @@ extern int fscrypt_encrypt_block_inplace(const struct inode *inode,
 					 gfp_t gfp_flags);
 extern int fscrypt_decrypt_page(const struct inode *, struct page *, unsigned int,
 				unsigned int, u64);
+extern int fscrypt_decrypt_block_inplace(const struct inode *inode,
+					 struct page *page, unsigned int len,
+					 unsigned int offs, u64 lblk_num);
 
 static inline bool fscrypt_is_bounce_page(struct page *page)
 {
@@ -315,6 +318,14 @@ static inline int fscrypt_decrypt_page(const struct inode *inode,
 	return -EOPNOTSUPP;
 }
 
+static inline int fscrypt_decrypt_block_inplace(const struct inode *inode,
+						struct page *page,
+						unsigned int len,
+						unsigned int offs, u64 lblk_num)
+{
+	return -EOPNOTSUPP;
+}
+
 static inline bool fscrypt_is_bounce_page(struct page *page)
 {
 	return false;
