Merge tag 's390-7.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Heiko Carstens:

 - Drop support for outdated 3590/3592 and 3480 tape devices, and limit
   support to virtualized 3490E types devices

 - Implement exception based WARN() and WARN_ONCE() similar to x86

 - Slightly optimize preempt primitives like __preempt_count_add() and
   __preempt_count_dec_and_test()

 - A couple of small fixes and improvements

* tag 's390-7.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (35 commits)
  s390/tape: Consolidate tape config options and modules
  s390/cio: Fix device lifecycle handling in css_alloc_subchannel()
  s390/tape: Rename tape_34xx.c to tape_3490.c
  s390/tape: Cleanup sense data analysis and error handling
  s390/tape: Remove 3480 tape device type
  s390/tape: Remove unused command definitions
  s390/tape: Remove special block id handling
  s390/tape: Remove tape load display support
  s390/tape: Remove support for 3590/3592 models
  s390/kexec: Emit an error message when cmdline is too long
  s390/configs: Enable BLK_DEV_NULL_BLK as module
  s390: Document s390 stackprotector support
  s390/perf: Disable register readout on sampling events
  s390/Kconfig: Define non-zero ILLEGAL_POINTER_VALUE
  s390/bug: Prevent tail-call optimization
  s390/bug: Skip __WARN_trap() in call traces
  s390/bug: Implement WARN_ONCE()
  s390/bug: Implement __WARN_printf()
  s390/traps: Copy monitor code to pt_regs
  s390/bug: Introduce and use monitor code macro
  ...

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