Merge remote-tracking branch 'origin/upstream-f2fs-stable-linux-4.14.y' into android-4.14

Merged in v5.5-rc1.

* origin/upstream-f2fs-stable-linux-4.14.y:
  docs: fs-verity: mention statx() support
  f2fs: support STATX_ATTR_VERITY
  ext4: support STATX_ATTR_VERITY
  statx: define STATX_ATTR_VERITY
  docs: fs-verity: document first supported kernel version
  f2fs: add support for IV_INO_LBLK_64 encryption policies
  ext4: add support for IV_INO_LBLK_64 encryption policies
  fscrypt: add support for IV_INO_LBLK_64 policies
  fscrypt: avoid data race on fscrypt_mode::logged_impl_name
  fscrypt: zeroize fscrypt_info before freeing
  fscrypt: remove struct fscrypt_ctx
  fscrypt: invoke crypto API for ESSIV handling

Change-Id: I9325127228fb82b67f064ce8b3bc8d40ac76e65b
Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>