recompiled 3.18.27 using copy of .config for 3.18.19 and aes-xts-plain64 is not available anymore. .config was not changed.

Unable to mount encrypted luks volume using aes-xts-plain64.

on 3.18.19:

/dev/mapper/crhome is active and is in use.
  type:    LUKS1
  cipher:  aes-xts-plain64
  keysize: 256 bits
  device:  /dev/sda5
  offset:  4096 sectors
  size:    3722440704 sectors
  mode:    read/write

---- lsmod -----

Module                  Size  Used by
arc4                   12608  2 
iwlmvm                239034  0 
mac80211              442770  1 iwlmvm
nf_log_ipv6            12726  5 
xt_pkttype             12504  4 
vmnet                  47264  2 
nf_log_ipv4            12767  5 
nf_log_common          13317  2 nf_log_ipv4,nf_log_ipv6
xt_LOG                 12690  10 
xt_limit               12711  10 
fuse                   88137  3 
vsock                  48841  0 
vmw_vmci               62927  1 vsock
vmmon                  84101  0 
iscsi_ibft             12862  0 
iscsi_boot_sysfs       16000  1 iscsi_ibft
ip6t_REJECT            12625  3 
nf_reject_ipv6         13523  1 ip6t_REJECT
xt_tcpudp              12884  3 
nf_conntrack_ipv6      14798  3 
nf_defrag_ipv6         34841  1 nf_conntrack_ipv6
ip6table_raw           12683  1 
ipt_REJECT             12541  3 
nf_reject_ipv4         13183  1 ipt_REJECT
iptable_raw            12678  1 
xt_CT                  12956  4 
iptable_filter         12810  1 
ip6table_mangle        12700  0 
nf_conntrack_netbios_ns    12665  0 
nf_conntrack_broadcast    12589  1 nf_conntrack_netbios_ns
nf_conntrack_ipv4      20106  3 
nf_defrag_ipv4         12758  1 nf_conntrack_ipv4
ip_tables              27240  2 iptable_filter,iptable_raw
xt_conntrack           12760  6 
nf_conntrack          106390  6 xt_CT,nf_conntrack_netbios_ns,xt_conntrack,nf_conntrack_broadcast,nf_conntrack_ipv4,nf_conntrack_ipv6
ip6table_filter        12815  1 
ip6_tables             27026  3 ip6table_filter,ip6table_mangle,ip6table_raw
x_tables               29964  15 xt_pkttype,ip6table_filter,xt_CT,ip6table_mangle,ip_tables,xt_tcpudp,xt_limit,xt_conntrack,xt_LOG,iptable_filter,ip6table_raw,ipt_REJECT,ip6_tables,iptable_raw,ip6t_REJECT
bnep                   19624  2 
algif_skcipher         13226  0 
af_alg                 14686  1 algif_skcipher
x86_pkg_temp_thermal    14205  0 
intel_powerclamp       18873  0 
coretemp               13441  0 
kvm_intel             140266  0 
kvm                   309997  1 kvm_intel
crct10dif_pclmul       14268  0 
crc32_pclmul           13133  0 
dell_led               12920  1 
snd_hda_codec_realtek    80278  1 
snd_hda_codec_generic    64876  1 snd_hda_codec_realtek
snd_hda_codec_hdmi     47879  1 
crc32c_intel           22094  0 
snd_hda_intel          30520  0 
sha256_ssse3           26322  2 
sha256_generic         17081  1 sha256_ssse3
dm_crypt               23177  2 
snd_hda_controller     29859  1 snd_hda_intel
ghash_clmulni_intel    13230  0 
aesni_intel           169590  5 
aes_x86_64             17131  1 aesni_intel
snd_hda_codec         123868  5 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_intel,snd_hda_controller
lrw                    13286  1 aesni_intel
snd_hwdep              13602  1 snd_hda_codec
snd_pcm               105851  4 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_controller
iwlwifi               127661  1 iwlmvm
e1000e                218408  0 
iTCO_wdt               13480  0 
iTCO_vendor_support    13718  1 iTCO_wdt
xhci_pci               13118  0 
xhci_hcd              150979  1 xhci_pci
sdhci_pci              23255  0 
dell_laptop            14000  0 
joydev                 17344  0 
gf128mul               14951  1 lrw
snd_timer              29513  1 snd_pcm
mei_me                 19616  0 
mei                    83776  1 mei_me
glue_helper            13990  1 aesni_intel
tpm_tis                18630  0 
ablk_helper            13597  1 aesni_intel
cryptd                 16263  5 ghash_clmulni_intel,aesni_intel,ablk_helper
ecb                    12815  2 
microcode              15439  0 
dcdbas                 14928  1 dell_laptop
tpm                    31774  1 tpm_tis
ppdev                  17671  0 
btusb                  32336  0 
dell_wmi               12681  0 
lpc_ich                21093  0 
i2c_i801               18147  0 
serio_raw              13434  0 
cfg80211              238483  3 iwlwifi,mac80211,iwlmvm
ptp                    19395  1 e1000e
shpchp                 32951  0 
pps_core               19333  1 ptp
i2c_hid                18726  0 
i2c_designware_platform    12979  0 
sparse_keymap          13948  1 dell_wmi
8250_dw                13516  0 
i2c_designware_core    14768  1 i2c_designware_platform
snd                    75090  8 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel
parport_pc             37262  0 
wmi                    19193  2 dell_led,dell_wmi
parport                42299  2 ppdev,parport_pc
dell_smo8800           13154  0 
bluetooth             445656  21 bnep,btusb
rfkill                 22676  5 cfg80211,bluetooth,dell_laptop
soundcore              15047  2 snd,snd_hda_codec
battery                19141  0 
ac                     13335  0 
acpi_pad               13846  0 
thermal                18790  0 
processor              36178  0 
fan                    13223  0 
tcp_westwood           12738  6 
dm_mod                 95532  5 dm_crypt
i915                  891303  5 
drm_kms_helper         94328  1 i915
drm                   295120  4 i915,drm_kms_helper
video                  20451  1 i915
sdhci_acpi             13502  0 
sdhci                  39307  2 sdhci_acpi,sdhci_pci
mmc_core              114096  3 sdhci,sdhci_acpi,sdhci_pci
button                 14015  1 i915
sg                     36625  0 
ipv6                  337618  36 ip6table_mangle,nf_defrag_ipv6,nf_reject_ipv6,nf_conntrack_ipv6

---- lsmod for 3.18.27 ----

Module                  Size  Used by
algif_skcipher         13226  0 
af_alg                 14900  1 algif_skcipher
sha256_ssse3           26322  2 
sha256_generic         17081  1 sha256_ssse3
dm_crypt               23177  1 
x86_pkg_temp_thermal    14205  0 
intel_powerclamp       18873  0 
coretemp               13441  0 
kvm_intel             140266  0 
dell_led               12920  1 
kvm                   310097  1 kvm_intel
crct10dif_pclmul       14268  0 
crc32_pclmul           13133  0 
crc32c_intel           22094  0 
snd_hda_codec_realtek    80278  1 
snd_hda_codec_hdmi     47879  1 
snd_hda_codec_generic    64876  1 snd_hda_codec_realtek
snd_hda_intel          30520  0 
aesni_intel           169590  3 
snd_hda_controller     29859  1 snd_hda_intel
snd_hda_codec         123868  5 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_intel,snd_hda_controller
snd_hwdep              13602  1 snd_hda_codec
aes_x86_64             17131  1 aesni_intel
ecb                    12815  2 
snd_pcm               105851  4 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_controller
btusb                  32336  0 
lrw                    13286  1 aesni_intel
snd_timer              29513  1 snd_pcm
ppdev                  17671  0 
e1000e                218408  0 
mei_me                 19616  0 
tpm_tis                18630  0 
gf128mul               14951  1 lrw
snd                    75090  8 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel
bluetooth             445656  2 btusb
iwlwifi               127781  1 
sdhci_pci              23255  0 
parport_pc             37262  0 
iTCO_wdt               13480  0 
tpm                    31774  1 tpm_tis
glue_helper            13990  1 aesni_intel
ablk_helper            13597  1 aesni_intel
dell_wmi               12681  0 
mei                    83776  1 mei_me
xhci_pci               13215  0 
cryptd                 16263  3 aesni_intel,ablk_helper
dell_laptop            13965  0 
ptp                    19395  1 e1000e
parport                42299  2 ppdev,parport_pc
iTCO_vendor_support    13718  1 iTCO_wdt
microcode              15439  0 
sparse_keymap          13948  1 dell_wmi
xhci_hcd              151141  1 xhci_pci
i2c_hid                18726  0 
dcdbas                 14928  1 dell_laptop
soundcore              15047  2 snd,snd_hda_codec
lpc_ich                21093  0 
cfg80211              238483  1 iwlwifi
pps_core               19333  1 ptp
wmi                    19193  2 dell_led,dell_wmi
shpchp                 32951  0 
rfkill                 22676  3 cfg80211,bluetooth,dell_laptop
joydev                 17344  0 
i2c_designware_platform    13025  0 
serio_raw              13434  0 
i2c_designware_core    14768  1 i2c_designware_platform
i2c_i801               18147  0 
dell_smo8800           13154  0 
processor              36178  0 
thermal                18790  0 
acpi_pad               13846  0 
8250_dw                13516  0 
battery                19141  0 
ac                     13335  0 
fan                    13223  0 
tcp_westwood           12738  0 
dm_mod                 95532  3 dm_crypt
i915                  891340  4 
drm_kms_helper         94489  1 i915
drm                   295120  3 i915,drm_kms_helper
video                  20451  1 i915
sdhci_acpi             13502  0 
sdhci                  39315  2 sdhci_acpi,sdhci_pci
mmc_core              114139  3 sdhci,sdhci_acpi,sdhci_pci
button                 14015  1 i915
sg                     36625  0 
ipv6                  337718  28 


-----

/proc/crypto do not differ on both kernels. Modprobe xts does not fix the problem.

pls fix.