** Patch added: "zfs-linux_0.8.3-1ubuntu12.4.debdiff"
   
https://bugs.launchpad.net/ubuntu/groovy/+source/zfs-linux/+bug/1892001/+attachment/5402457/+files/zfs-linux_0.8.3-1ubuntu12.4.debdiff

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https://bugs.launchpad.net/bugs/1892001

Title:
  zfs-dkms fails to build on arm64 with PREEMPTION and BLK_CGROUP

Status in zfs-linux package in Ubuntu:
  New
Status in zfs-linux source package in Bionic:
  New
Status in zfs-linux source package in Focal:
  New
Status in zfs-linux source package in Groovy:
  New

Bug description:
  On arm64 with PREEMPTION and BLK_CGROUP enabled,
  preempt_schedule_notrace is being pulled in which is a GPL-only
  function so the DKMS build fails:

  DKMS make.log for zfs-0.8.3 for kernel 5.4.0-1015-raspi (aarch64)
  Tue Aug 18 06:30:17 UTC 2020
  ./scripts/make_gitrev.sh
  /bin/bash: ./scripts/make_gitrev.sh: No such file or directory
  make: [Makefile:1512: gitrev] Error 127 (ignored)
  make  all-recursive
  make[1]: Entering directory '/var/lib/dkms/zfs/0.8.3/build'
  Making all in module
  make[2]: Entering directory '/var/lib/dkms/zfs/0.8.3/build/module'
  list='icp lua'; for targetdir in $list; do \
          make -C $targetdir; \
  done
  make[3]: Entering directory '/var/lib/dkms/zfs/0.8.3/build/module/icp'
  mkdir -p api core spi io os algs algs/aes algs/edonr algs/modes algs/sha1 
algs/sha2 algs/skein asm-x86_64 asm-x86_64/aes asm-x86_64/modes asm-x86_64/sha1 
asm-x86_64/sha2 asm-i386 asm-generic
  make[3]: Leaving directory '/var/lib/dkms/zfs/0.8.3/build/module/icp'
  make[3]: Entering directory '/var/lib/dkms/zfs/0.8.3/build/module/lua'
  mkdir -p setjmp
  make[3]: Leaving directory '/var/lib/dkms/zfs/0.8.3/build/module/lua'
  make -C /lib/modules/5.4.0-1015-raspi/build M=`pwd`  CONFIG_ZFS=m modules
  make[3]: Entering directory '/usr/src/linux-headers-5.4.0-1015-raspi'
    CC [M]  /var/lib/dkms/zfs/0.8.3/build/module/avl/avl.o
    CC [M]  /var/lib/dkms/zfs/0.8.3/build/module/nvpair/nvpair.o

  <SNIP>

    CC [M]  /var/lib/dkms/zfs/0.8.3/build/module/zfs/qat_compress.o
    CC [M]  /var/lib/dkms/zfs/0.8.3/build/module/zfs/qat_crypt.o
    CC [M]  
/var/lib/dkms/zfs/0.8.3/build/module/zfs/vdev_raidz_math_aarch64_neon.o
    CC [M]  
/var/lib/dkms/zfs/0.8.3/build/module/zfs/vdev_raidz_math_aarch64_neonx2.o
    LD [M]  /var/lib/dkms/zfs/0.8.3/build/module/zfs/zfs.o
    Building modules, stage 2.
    MODPOST 8 modules
  FATAL: modpost: GPL-incompatible module zfs.ko uses GPL-only symbol 
'preempt_schedule_notrace'
  make[4]: *** [scripts/Makefile.modpost:94: __modpost] Error 1
  make[3]: *** [Makefile:1647: modules] Error 2
  make[3]: Leaving directory '/usr/src/linux-headers-5.4.0-1015-raspi'
  make[2]: *** [Makefile:30: modules] Error 2
  make[2]: Leaving directory '/var/lib/dkms/zfs/0.8.3/build/module'
  make[1]: *** [Makefile:807: all-recursive] Error 1
  make[1]: Leaving directory '/var/lib/dkms/zfs/0.8.3/build'
  make: *** [Makefile:676: all] Error 2

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