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Retrieve electrical power readings for resources in a computing environment via diag 0x324. diag 0x324 stores the power readings in the power information block (pib). Provide power readings from pib via diag324 ioctl interface. diag324 ioctl provides new pib to the user only if the threshold time has passed since the last call. Otherwise, cache data is returned. When there are no active readers, cleanup of pib buffer is performed. Reviewed-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Sumanth Korikkar <sumanthk@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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 reStructuredText 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.
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