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Add module for accessing the mailbox property channel through /dev/vcio. Was previously in bcm2708-vcio. Signed-off-by: Noralf Trønnes <noralf@tronnes.org> char: vcio: Add compat ioctl handling There was no compat ioctl handler, so 32 bit userspace on a 64 bit kernel failed as IOCTL_MBOX_PROPERTY used the size of char*. Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org> char: vcio: Fail probe if rpi_firmware is not found. Device Tree is now the only supported config mechanism, therefore uncomment the block of code that fails the probe if the firmware node can't be found. Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.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.