@hws @michael.holzheu @schwidefsky

It seems like schwidefsky updated s390 config upstream in v4.12 to
remove -CONFIG_DEBUG_FS=y for the zfcpdump_defconfig. Meaning any Linux
on Z systems using v4.12+ default zfcpdump_defconfig from upstream linux
source tree will get a bad configuration. It seems counter productive to
ask all downstreams to patch for this config issue.

Are you going to get in touch with schwidefsky to re-introduce
CONFIG_DEBUG_FS=y in the zfcpdump_defconfig and get it applied in the
stable trees too?

Also, i believe zfcpdump-kernel that we currently ship does have debugfs
enabled. Are you using zfcpdump-kernel as provided in ubuntu? But we
will note and will explicitely enable CONFIG_DEBUG_FS=y when we refress
zfcpdump-kernel with v4.13+.

Regards,

Dimitri.

** Changed in: zfcpdump-kernel (Ubuntu Artful)
       Status: Triaged => Incomplete

** Changed in: linux (Ubuntu Artful)
       Status: Triaged => Incomplete

** Changed in: ubuntu-z-systems
       Status: Triaged => Incomplete

** No longer affects: zfcpdump-kernel (Ubuntu Artful)

** No longer affects: linux (Ubuntu Artful)

** Also affects: linux-hwe (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: linux-hwe (Ubuntu)
       Status: New => Incomplete

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You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1719290

Title:
  CONFIG_DEBUG_FS is not enabled by "make zfcpdump_defconfig" with
  Ubuntu 17.10 (kernel 4.13)

Status in Ubuntu on IBM z Systems:
  Incomplete
Status in linux package in Ubuntu:
  Incomplete
Status in linux-hwe package in Ubuntu:
  Incomplete
Status in zfcpdump-kernel package in Ubuntu:
  Incomplete

Bug description:
  Ubuntu 17.10 uses kernel 4.13.

  We just found out that on this kernel version CONFIG_DEBUG_FS is not
  enabled by "make zfcpdump_defconfig".

  This makes zfcpdump fail with the following error message:

  ERROR: Unable to mount debugfs 
  No such file or directory

  Patch solving this problem is attached

  As reference following bugzilla
  As reference h
  IBM bugzilla for enabling zfcpdump: 
https://bugzilla.linux.ibm.com/show_bug.cgi?id=139974

  or Launchpad 
  https://bugs.launchpad.net/ubuntu/+source/s390-tools/+bug/1565841

  == Comment: #1 - Heinz-Werner Seeck <heinz-werner_se...@de.ibm.com> -
  2017-09-25 06:00:23 ==

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