Commit 222013f9 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jens Axboe
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cryptoloop: add a deprecation warning

Support for cryptoloop has been officially marked broken and deprecated
in favor of dm-crypt (which supports the same broken algorithms if
needed) in Linux 2.6.4 (released in March 2004), and support for it has
been entirely removed from losetup in util-linux 2.23 (released in April
2013).  Add a warning and a deprecation schedule.

Signed-off-by: default avatarChristoph Hellwig <>

Signed-off-by: default avatarJens Axboe <>
parent 3375dca0
......@@ -213,7 +213,7 @@ config BLK_DEV_LOOP_MIN_COUNT
dynamically allocated with the /dev/loop-control interface.
tristate "Cryptoloop Support"
tristate "Cryptoloop Support (DEPRECATED)"
select CRYPTO
depends on BLK_DEV_LOOP
......@@ -225,7 +225,7 @@ config BLK_DEV_CRYPTOLOOP
WARNING: This device is not safe for journaled file systems like
ext3 or Reiserfs. Please use the Device Mapper crypto module
instead, which can be configured to be on-disk compatible with the
cryptoloop device.
cryptoloop device. cryptoloop support will be removed in Linux 5.16.
source "drivers/block/drbd/Kconfig"
......@@ -189,6 +189,8 @@ init_cryptoloop(void)
if (rc)
printk(KERN_ERR "cryptoloop: loop_register_transfer failed\n");
pr_warn("the cryptoloop driver has been deprecated and will be removed in in Linux 5.16\n");
return rc;
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