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bf5fb8ae82
Instead of walking the list of children of an ACPI device directly in order to find the child matching a given bus address, use acpi_find_child_by_adr() for this purpose. Also notice that if acpi_find_child_by_adr() doesn't find a matching child, acpi_find_child_device() will not find it too, so directly replace usb_acpi_find_port() in usb_acpi_get_companion_for_port() with acpi_find_child_by_adr() and drop it entirely. Apart from simplifying the code, this will help to eliminate the children list head from struct acpi_device as it is redundant and it is used in questionable ways in some places (in particular, locking is needed for walking the list pointed to it safely, but it is often missing). Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.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 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.