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The use of struct range in the CXL subsystem is growing. In particular, the addition of Dynamic Capacity devices uses struct range in a number of places which are reported in debug and error messages. To wit requiring the printing of the start/end fields in each print became cumbersome. Dan Williams mentions in [1] that it might be time to have a print specifier for struct range similar to struct resource. A few alternatives were considered including '%par', '%r', and '%pn'. %pra follows that struct range is similar to struct resource (%p[rR]) but needs to be different. Based on discussions with Petr and Andy '%pra' was chosen.[2] Andy also suggested to keep the range prints similar to struct resource though combined code. Add hex_range() to handle printing for both pointer types. Finally introduce DEFINE_RANGE() as a parallel to DEFINE_RES_*() and use it in the tests. Cc: Jonathan Corbet <corbet@lwn.net> Cc: linux-doc@vger.kernel.org Cc: open list <linux-kernel@vger.kernel.org> Link: https://lore.kernel.org/all/663922b475e50_d54d72945b@dwillia2-xfh.jf.intel.com.notmuch/ [1] Link: https://lore.kernel.org/all/66cea3bf3332f_f937b29424@iweiny-mobl.notmuch/ [2] Suggested-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Ira Weiny <ira.weiny@intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://patch.msgid.link/20241025-cxl-pra-v2-3-123a825daba2@intel.com Signed-off-by: Dave Jiang <dave.jiang@intel.com> |
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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.