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ce4b2c0178
If HARDLOCKUP_DETECTOR_PERF is selected but HW_PERF_EVENTS is not, then
the associated watchdog driver will fail to link:
| aarch64-linux-ld: Unexpected GOT/PLT entries detected!
| aarch64-linux-ld: Unexpected run-time procedure linkages detected!
| aarch64-linux-ld: kernel/watchdog_hld.o: in function `hardlockup_detector_event_create':
| >> watchdog_hld.c:(.text+0x68): undefined reference to `hw_nmi_get_sample_period
Change the Kconfig dependencies so that HAVE_PERF_EVENTS_NMI requires
the hardware PMU driver to be enabled, ensuring that the required
symbols are present.
Cc: Sumit Garg <sumit.garg@linaro.org>
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/r/202012031509.4O5ZoWNI-lkp@intel.com
Fixes: 367c820ef0 ("arm64: Enable perf events based hard lockup detector")
Signed-off-by: Will Deacon <will@kernel.org>
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.