ubifs: add CONFIG_BLOCK dependency for encryption

This came up during the v4.10 merge window:

warning: (UBIFS_FS_ENCRYPTION) selects FS_ENCRYPTION which has unmet direct dependencies (BLOCK)
fs/crypto/crypto.c: In function 'fscrypt_zeroout_range':
fs/crypto/crypto.c:355:9: error: implicit declaration of function 'bio_alloc';did you mean 'd_alloc'? [-Werror=implicit-function-declaration]
   bio = bio_alloc(GFP_NOWAIT, 1);

The easiest way out is to limit UBIFS_FS_ENCRYPTION to configurations
that also enable BLOCK.

Fixes: d475a507457b ("ubifs: Add skeleton for fscrypto")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Richard Weinberger <richard@nod.at>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/ubifs/Kconfig b/fs/ubifs/Kconfig
index 0a908ae7af13..b0d0623c83ed 100644
--- a/fs/ubifs/Kconfig
+++ b/fs/ubifs/Kconfig
@@ -53,7 +53,7 @@ config UBIFS_ATIME_SUPPORT
 
 config UBIFS_FS_ENCRYPTION
         bool "UBIFS Encryption"
-        depends on UBIFS_FS
+        depends on UBIFS_FS && BLOCK
         select FS_ENCRYPTION
         default n
         help