[v2,04/11] fscrypt: move fscrypt_ctx declaration to fscrypt_supp.h

Commit Message

Eric Biggers Jan. 5, 2018, 6:44 p.m. UTC

From: Eric Biggers <[e-mail]>

Filesystems only ever access 'struct fscrypt_ctx' through fscrypt
functions.  But when a filesystem is built without encryption support,
these functions are all stubbed out, so the declaration of fscrypt_ctx
is unneeded.  Therefore, move it from fscrypt.h to fscrypt_supp.h.

Signed-off-by: Eric Biggers <[e-mail]>
---
 include/linux/fscrypt.h      | 16 +---------------
 include/linux/fscrypt_supp.h | 15 +++++++++++++++
 2 files changed, 16 insertions(+), 15 deletions(-)

Patch

diff --git a/include/linux/fscrypt.h b/include/linux/fscrypt.h
index c23b2f16129a..0f94d087a6d1 100644
--- a/include/linux/fscrypt.h
+++ b/include/linux/fscrypt.h
@@ -24,23 +24,9 @@ 
 
 #define FS_CRYPTO_BLOCK_SIZE		16
 
+struct fscrypt_ctx;
 struct fscrypt_info;
 
-struct fscrypt_ctx {
-	union {
-		struct {
-			struct page *bounce_page;	/* Ciphertext page */
-			struct page *control_page;	/* Original page  */
-		} w;
-		struct {
-			struct bio *bio;
-			struct work_struct work;
-		} r;
-		struct list_head free_list;	/* Free list */
-	};
-	u8 flags;				/* Flags */
-};
-
 /**
  * For encrypted symlinks, the ciphertext length is stored at the beginning
  * of the string in little-endian format.
diff --git a/include/linux/fscrypt_supp.h b/include/linux/fscrypt_supp.h
index 33d641e27c18..fd6ee089ced0 100644
--- a/include/linux/fscrypt_supp.h
+++ b/include/linux/fscrypt_supp.h
@@ -11,6 +11,21 @@ 
 #ifndef _LINUX_FSCRYPT_SUPP_H
 #define _LINUX_FSCRYPT_SUPP_H
 
+struct fscrypt_ctx {
+	union {
+		struct {
+			struct page *bounce_page;	/* Ciphertext page */
+			struct page *control_page;	/* Original page  */
+		} w;
+		struct {
+			struct bio *bio;
+			struct work_struct work;
+		} r;
+		struct list_head free_list;	/* Free list */
+	};
+	u8 flags;				/* Flags */
+};
+
 static inline bool fscrypt_has_encryption_key(const struct inode *inode)
 {
 	return (inode->i_crypt_info != NULL);