mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-05 16:37:50 +00:00
No description
5569a12609
This patch adds compatibility wrappers for the ioctls exposed by vchiq/vc04_services. The compat ioctls are completely implemented on top of the native ioctls. No existing lines are modified. While the ideal approach would be to cleanup the existing code, this path is simplier and easier to review. While it does have a small runtime performance penality vs seperating the existing code into wrapper+worker functions, the penality is small since only the metadata is copied back onto the 32 bit user mode stack. The on top of approach is the approach used by several existing performance critical subsystems of Linux such as the DRM 3D graphics subsystem. Testing: 1. A 32 bit chroot was created on a RPI 3 and vchiq_test was built for armhf. The usual tests were run such as vchiq_test -f 10 and vchiq_test -p. 2. This patch was copied onto the shipping version of the Linux kernel used for the RPI and that kernel was built for arm64. That kernel was used to boot Raspbian. Many of the builtin features are now functional such as the "hello_pi" examples, and minecraft_pi. Signed-off-by: Michael Zoran <mzoran@crowfest.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
||
|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.