Linux kernel modifications for the Kernel Hacking exam
a667d7456f
Patch series "mm: Use vm_map_pages() and vm_map_pages_zero() API", v5. This patch (of 5): Previouly drivers have their own way of mapping range of kernel pages/memory into user vma and this was done by invoking vm_insert_page() within a loop. As this pattern is common across different drivers, it can be generalized by creating new functions and using them across the drivers. vm_map_pages() is the API which can be used to map kernel memory/pages in drivers which have considered vm_pgoff vm_map_pages_zero() is the API which can be used to map a range of kernel memory/pages in drivers which have not considered vm_pgoff. vm_pgoff is passed as default 0 for those drivers. We _could_ then at a later "fix" these drivers which are using vm_map_pages_zero() to behave according to the normal vm_pgoff offsetting simply by removing the _zero suffix on the function name and if that causes regressions, it gives us an easy way to revert. Tested on Rockchip hardware and display is working, including talking to Lima via prime. Link: http://lkml.kernel.org/r/751cb8a0f4c3e67e95c58a3b072937617f338eea.1552921225.git.jrdr.linux@gmail.com Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com> Suggested-by: Russell King <linux@armlinux.org.uk> Suggested-by: Matthew Wilcox <willy@infradead.org> Reviewed-by: Mike Rapoport <rppt@linux.ibm.com> Tested-by: Heiko Stuebner <heiko@sntech.de> Cc: Michal Hocko <mhocko@suse.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Rik van Riel <riel@surriel.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Thierry Reding <treding@nvidia.com> Cc: Kees Cook <keescook@chromium.org> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: Stefan Richter <stefanr@s5r6.in-berlin.de> Cc: Sandy Huang <hjc@rock-chips.com> Cc: David Airlie <airlied@linux.ie> Cc: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Pawel Osciak <pawel@osciak.com> Cc: Kyungmin Park <kyungmin.park@samsung.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Juergen Gross <jgross@suse.com> Cc: Mauro Carvalho Chehab <mchehab@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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.