Linus Torvalds 8e2e0104ef s390 updates
- setup stack backchain properly in external and i/o interrupt handler
   to fix stack unwinding. This broke when converting to generic entry.
 
 - save caller address of psw_idle to get a sane stacktrace.
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Merge tag 's390-5.12-7' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 fixes from Heiko Carstens:

 - setup stack backchain properly in external and i/o interrupt handler
   to fix stack unwinding. This broke when converting to generic entry

  - save caller address of psw_idle to get a sane stacktrace

* tag 's390-5.12-7' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/entry: save the caller of psw_idle
  s390/entry: avoid setting up backchain in ext|io handlers
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