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60b04df6bf
Pull s390 fixes from Vasily Gorbik: - Fix unwinding from irq context of interrupted user process. - Add purgatory build missing symbols check. That helped to uncover and fix missing symbols when built with kasan support enabled. - Couple of ftrace fixes. Avoid broken stack trace and fix recursion loop in function_graph tracer. * tag 's390-5.5-4' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/ftrace: save traced function caller s390/unwind: stop gracefully at user mode pt_regs in irq stack s390/purgatory: do not build purgatory with kcov, kasan and friends s390/purgatory: Make sure we fail the build if purgatory has missing symbols s390/ftrace: fix endless recursion in function_graph tracer
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.