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The document describes userspace API and as such it belongs to
Documentation/admin-guide/mm
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
The document describes NUMA memory policy and as it is a part of the Linux
documentation it's obvious that this is Linux memory policy. Besides,
"Linux memory policy" may refer to other policies, e.g. memory hotplug
policy, and using term NUMA makes the documentation less ambiguous.
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Uses '!RWSEM_GENERIC_SPINLOCK' in place of 'Optimized asm/rwsem.h' as
Kconfig for 'rwsem-optimized': the new Kconfig expresses this feature
equivalently, while also enabling the script 'features-refresh.sh' to
operate on the corresponding arch support status file. Also refreshes
the status matrix by using the script 'features-refresh.sh'.
Suggested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Andrea Parri <andrea.parri@amarulasolutions.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Commit 6077776b5908e split 'HAVE_BPF_JIT' into cBPF and eBPF variant.
Adds arch support status files for the new variants, and removes the
status file corresponding to 'HAVE_BPT_JIT'. The new status matrices
were auto-generated using the script 'features-refresh.sh'.
Signed-off-by: Andrea Parri <andrea.parri@amarulasolutions.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Now that the script 'features-refresh.sh' is available, uses this script
to refresh all the arch-support.txt files in place.
Signed-off-by: Andrea Parri <andrea.parri@amarulasolutions.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Provides the script:
Documentation/features/scripts/features-refresh.sh
which operates on the arch-support.txt files and refreshes them in place.
This way [1],
"[...] we soft- decouple the refreshing of the entries from the
introduction of the features, while still making it all easy to
keep sync and to extend."
[1] http://lkml.kernel.org/r/20180328122211.GA25420@andrea
Suggested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Andrea Parri <andrea.parri@amarulasolutions.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Make the description of the kernel command line option "blkdevparts"
a bit more flowing and readable.
Fix a few typos.
Add the optional <size> and <offset> suffixes.
Note that size can be "-" to indicate all of the remaining space.
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Cai Zhiyong <caizhiyong@huawei.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Update vfio_add_group_dev description to match the current API.
Signed-off-by: Dong Bo <dongbo4@huawei.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This came up in discussions when reviewing drm patches.
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Remove implementation details from sysfs parameter descriptions.
Also move the paragraph discussing fragmentation issues and their possible
solution to the "Design" section.
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Make the description of stable_node_chains_prune_millisecs sysfs parameter
less implementation aware and add a few words about this parameter in the
"Design" section.
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
The description of "max_page_sharing" sysfs attribute includes lots of
implementation details that more naturally belong in the "Design"
section.
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Include the KSM description from the source code comment, add a subsection
about reverse mapping and include kernel-doc references for KSM data
structures.
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Aside from the formatting:
* fixed typos
* added section and sub-section headers
* moved ksmd overview after the description of KSM origins
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
The existing comment provides a good overview of KSM implementation. Let's
update it to reflect recent additions of "chain" and "dup" variants of the
stable tree nodes and mark it as "DOC:" for inclusion into the KSM
documentation.
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Using incorrect :functions: syntax (extra space) causes an odd kernel-doc
warning, so fix that.
Documentation/driver-api/device_connection.rst:42: ERROR: Error in "kernel-doc" directive:
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Rearrange some kernel-api chapters and sections to group them
together better.
- move Bit Operations from Basic C Library Functions to Basic
Kernel Library Functions (now adjacent to Bitmap Operations since
they are not typical C library functions)
- move Sorting from Math Functions to Basic Kernel Library Functions
since sort functions are more Basic than Math Functions
- move Text Searching from Math Functions to Basic Kernel Library
Functions (keep Sorting and Searching close to each other)
- combine CRC and Math functions together into the (newly named)
CRC and Math Functions chapter
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Matthew Wilcox <mawilcox@microsoft.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Merge tag 'v4.17-rc2' into docs-next
Merge -rc2 to pick up the changes to
Documentation/core-api/kernel-api.rst that hit mainline via the
networking tree. In their absence, subsequent patches cannot be
applied.
Several documents in Documentation/vm fit quite well into the "admin/user
guide" category. The documents that don't overload the reader with lots of
implementation details and provide coherent description of certain feature
can be moved to Documentation/admin-guide/mm.
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
"pagemap from the Userspace Perspective" is not very descriptive for
unaware readers. Since the document describes how to examine a process page
tables, let's title it "Examining Process Page Tables"
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
The hugetlbpage describes hugetlbfs from the user perspective and newer
hugetlbfs_reserv document targets kernel developers. Hence the section
about hugetlbfs kernel development naturally belongs there.
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This patch groups together section pertaining to the perf tools. That way
everything is at the same place rather than spread out.
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Adding a section that document how to use the Coresight framework and
drivers from the perf tools.
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Field "owner" of struct coresight_desc has been removed a while back but
the documentation was not updated to reflect the changes.
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Add a description that the kernel headers should be used as far as it is
possible and then the system headers.
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Reviewed-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Some lines used spaces instead of tabs at line start.
This can cause mangled lines in editors due to inconsistency.
Replace spaces for tabs where appropriate.
Signed-off-by: Thymo van Beers <thymovanbeers@gmail.com>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Thomas said:
There are a few bogus SPDX identifiers in various files and SPDX
Identifiers used in tree or about to be used which have no corresponding
License Text file in the LICENSES directory or use the new variant of the
GPL-2.0[+] license identifiers which are not mentioned in the GPL-2.0
Valid-License-Identifiers: tags.
There is no tool which can be used to scan the tree and also nothing which
helps people who submit patches to check their stuff before submission.
The following series cleans that up:
- Add GPL-2.0-only and GPL-2.0-or-later identifiers to the GPL2.0 license
and the Linux-syscall-note exception
- Add X11, Apache-2.0, CC-BY-SA-4.0, CCDL-1.0, Linux-OpenIB license texts
to the LICENSES directory along with the required documentation texts
- Add a checker script which can read a single file or even a patch from
the command line or does a full git tree scan
[Thomas also wins some sort of special prize for including an SPDX-checking
patch that complains about itself!]
The SPDX-License-Identifiers are growing in the kernel and so grow
expression failures and license IDs are used which have no corresponding
license text file in the LICENSES directory.
Add a script which gathers information from the LICENSES directory,
i.e. the various tags in the licenses and exception files and then scans
either input from stdin, which it treats as a single file or if started
without arguments it scans the full kernel tree.
It checks whether the license expression syntax is correct and also
validates whether the license identifiers used in the expressions are
available in the LICENSES files.
scripts/spdxcheck.py -h
usage: spdxcheck.py [-h] [-m MAXLINES] [-v] [path [path ...]]
SPDX expression checker
positional arguments:
path Check path or file. If not given full git tree scan.
For stdin use "-"
optional arguments:
-h, --help show this help message and exit
-m MAXLINES, --maxlines MAXLINES
Maximum number of lines to scan in a file. Default 15
-v, --verbose Verbose statistics output
include/dt-bindings/reset/amlogic,meson-axg-reset.h: 9:41 Invalid License ID: BSD
drivers/pinctrl/sh-pfc/pfc-r8a77965.c: 1:28 Invalid License ID: GPL-2.
include/dt-bindings/reset/amlogic,meson-axg-reset.h: 9:41 Invalid License ID: BSD
arch/x86/kernel/jailhouse.c: 1:28 Invalid License ID: GPL2.0
include/dt-bindings/reset/amlogic,meson-axg-reset.h: 9:41 Invalid License ID: BSD
arch/arm/mach-s3c24xx/h1940-bluetooth.c: 1:28 Invalid License ID: GPL-1.0
arch/x86/kernel/jailhouse.c: 1:28 Invalid License ID: GPL2.0
drivers/pinctrl/sh-pfc/pfc-r8a77965.c: 1:28 Invalid License ID: GPL-2.
include/dt-bindings/reset/amlogic,meson-axg-reset.h: 9:41 Invalid License ID: BSD
arch/x86/include/asm/jailhouse_para.h: 1:28 Invalid License ID: GPL2.0
arch/arm/mach-s3c24xx/h1940-bluetooth.c: 1:28 Invalid License ID: GPL-1.0
arch/x86/kernel/jailhouse.c: 1:28 Invalid License ID: GPL2.0
drivers/pinctrl/sh-pfc/pfc-r8a77965.c: 1:28 Invalid License ID: GPL-2.
include/dt-bindings/reset/amlogic,meson-axg-reset.h: 9:41 Invalid License ID: BSD
arch/x86/include/asm/jailhouse_para.h: 1:28 Invalid License ID: GPL2.0
License files: 14
Exception files: 1
License IDs 19
Exception IDs 1
Files checked: 61332
Lines checked: 669181
Files with SPDX: 16169
Files with errors: 5
real 0m2.642s
user 0m2.231s
sys 0m0.467s
That's a full tree sweep on my laptop. Note, this runs single threaded.
It scans by default the first 15 lines for a SPDX identifier where the
current max inside a top comment is at line 10. But that's going to be
faster once the identifiers are all in the first two lines as documented.
The python wizards will surely know how to do that smarter and faster, but
its at least better than no tool at all.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[jc: Fixed ironically erroneous SPDX tag and did chmod +x ]
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
The infiniband code uses a variant of the OpenIB license. This license is
BSD-2-Clause with the MIT disclaimer. The linux kernel uses this license
extensively throughout the driver subsystem since 2005. Note that the
OpenIB.org license is a true match to BSD-2-Clause.
The license text was copied from:
https://spdx.org/licenses/Linux-OpenIB.html#licenseText
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Add the full text of the CC-BY-SA-4.0 license to the kernel tree. It was
copied directly from:
https://spdx.org/licenses/CC-BY-SA-4.0.html#licenseText
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Add the full text of the CDDL-1.0 to the kernel tree. It was copied directly
from:
https://spdx.org/licenses/CDDL-1.0.html#licenseText
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Add the full text of the Apache License version 2 to the kernel tree. It
was copied directly from:
https://spdx.org/licenses/Apache-2.0.html#licenseText
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Add the full text of the X11 to the kernel tree. It was copied directly
from:
https://spdx.org/licenses/X11.html#licenseText
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Quite some files have been flagged with the new GPL-2.0-only and
GPL-2.0-or-later identifiers which replace the original GPL-2.0 and
GPL-2.0+ identifiers in the SPDX license identifier specification, but the
identifiers are not mentioned as valid in the GPL-2.0 license file.
Add them to the license file and to the Linux-syscall-note exception to
make everything consistent again.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Cc: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This patch corrects some spelling typo in ftrace-users.rst
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Merge tag 'drm-fixes-for-v4.17-rc2' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
"Exynos, i915, vc4, amdgpu fixes.
i915:
- an oops fix
- two race fixes
- some gvt fixes
amdgpu:
- dark screen fix
- clk/voltage fix
- vega12 smu fix
vc4:
- memory leak fix
exynos just drops some code"
* tag 'drm-fixes-for-v4.17-rc2' of git://people.freedesktop.org/~airlied/linux: (23 commits)
drm/amd/powerplay: header file interface to SMU update
drm/amd/pp: Fix bug voltage can't be OD separately on VI
drm/amd/display: Don't program bypass on linear regamma LUT
drm/i915: Fix LSPCON TMDS output buffer enabling from low-power state
drm/i915/audio: Fix audio detection issue on GLK
drm/i915: Call i915_perf_fini() on init_hw error unwind
drm/i915/bios: filter out invalid DDC pins from VBT child devices
drm/i915/pmu: Inspect runtime PM state more carefully while estimating RC6
drm/i915: Do no use kfree() to free a kmem_cache_alloc() return value
drm/exynos: exynos_drm_fb -> drm_framebuffer
drm/exynos: Move dma_addr out of exynos_drm_fb
drm/exynos: Move GEM BOs to drm_framebuffer
drm: Fix HDCP downstream dev count read
drm/vc4: Fix memory leak during BO teardown
drm/i915/execlists: Clear user-active flag on preemption completion
drm/i915/gvt: Add drm_format_mod update
drm/i915/gvt: Disable primary/sprite/cursor plane at virtual display initialization
drm/i915/gvt: Delete redundant error message in fb_decode.c
drm/i915/gvt: Cancel dma map when resetting ggtt entries
drm/i915/gvt: Missed to cancel dma map for ggtt entries
...
- Fix a dark screen issue in DC
- Fix clk/voltage dependency tracking for wattman
- Update SMU interface for vega12
* 'drm-next-4.17' of git://people.freedesktop.org/~agd5f/linux:
drm/amd/powerplay: header file interface to SMU update
drm/amd/pp: Fix bug voltage can't be OD separately on VI
drm/amd/display: Don't program bypass on linear regamma LUT
relevant functions.
- it removes exynos_drm_fb structure which is a wrapper of
drm_framebuffer and unnecessary two exynos specific callback
functions, exynos_drm_destory() and exynos_drm_fb_create_handle()
because we can reuse existing drm common callback ones instead.
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Merge tag 'exynos-drm-fixes-for-v4.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos into drm-next
Remove Exynos specific framebuffer structure and
relevant functions.
- it removes exynos_drm_fb structure which is a wrapper of
drm_framebuffer and unnecessary two exynos specific callback
functions, exynos_drm_destory() and exynos_drm_fb_create_handle()
because we can reuse existing drm common callback ones instead.
* tag 'exynos-drm-fixes-for-v4.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos:
drm/exynos: exynos_drm_fb -> drm_framebuffer
drm/exynos: Move dma_addr out of exynos_drm_fb
drm/exynos: Move GEM BOs to drm_framebuffer
drm/amdkfd: Deallocate SDMA queues correctly
drm/amdkfd: Fix scratch memory with HWS enabled
- Fix for FDO #105549: Avoid OOPS on bad VBT (Jani)
- Fix rare pre-emption race (Chris)
- Fix RC6 race against PM transitions (Tvrtko)
* tag 'drm-intel-next-fixes-2018-04-19' of git://anongit.freedesktop.org/drm/drm-intel:
drm/i915/audio: Fix audio detection issue on GLK
drm/i915: Call i915_perf_fini() on init_hw error unwind
drm/i915/bios: filter out invalid DDC pins from VBT child devices
drm/i915/pmu: Inspect runtime PM state more carefully while estimating RC6
drm/i915: Do no use kfree() to free a kmem_cache_alloc() return value
drm/i915/execlists: Clear user-active flag on preemption completion
drm/i915/gvt: Add drm_format_mod update
drm/i915/gvt: Disable primary/sprite/cursor plane at virtual display initialization
drm/i915/gvt: Delete redundant error message in fb_decode.c
drm/i915/gvt: Cancel dma map when resetting ggtt entries
drm/i915/gvt: Missed to cancel dma map for ggtt entries
drm/i915/gvt: Make MI_USER_INTERRUPT nop in cmd parser
drm/i915/gvt: Mark expected switch fall-through in handle_g2v_notification
drm/i915/gvt: throw error on unhandled vfio ioctls
