Commit Graph

44573 Commits

Author SHA1 Message Date
Mauro Carvalho Chehab
c5b352431f media: docs: update avermedia.rst contents
While this is old, now that we moved the intro part of it,
its contents seem to be valid, if we mention that we're
talking only about the BT878 support.

Update the document title accordingly and remove the obsolete
note from it.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-15 15:51:23 +02:00
Mauro Carvalho Chehab
03693a5a23 media: docs: intro.rst actually contain DVB references
This document doesn't describe the DVB subsystem. Instead, it
just contain references to some places.

Better name it and improve its contents.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-15 15:51:23 +02:00
Mauro Carvalho Chehab
109895a152 media: docs: dvb_intro.rst: update its contents
The content there is somewhat outdated. Update to reflect
the current status.

While here, remove extra spaces, as we won't be preserving
left margin alinment on this document.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-15 15:51:23 +02:00
Mauro Carvalho Chehab
c4b89166d2 media: docs: split avermedia.rst contents on two files
Part of this document has nothing to do with the Avermedia
driver. It is generic to the entire subsystem. So, split it
on a separate file.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-15 15:51:23 +02:00
Mauro Carvalho Chehab
b533cad6fd media: docs: update cardlists
There were some changes at the drivers adding support for
more cards. Update cardlists accordingly.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-15 15:51:22 +02:00
Mauro Carvalho Chehab
ec16d2ab4d media: docs: fix some broken references
Some media files got moved. Update the corresponding
references to the referenced files.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 12:58:59 +02:00
Bingbu Cao
9611ba28d8 media: ipu3.rst: add yuv-downscaling into pipeline diagram
For ipu3 ImgU image processing, the frame data from TNR can feed into
DDR by Output Formatting System or feed into YUV downscaler to do YUV
downscaling for secondary output, which is usually used for display.
current ImgU image pipeline diagram misses the YUV downscaling,
this patch add it to aligh with actual hardware blocks.

Signed-off-by: Bingbu Cao <bingbu.cao@intel.com>
Suggested-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 12:31:55 +02:00
Bingbu Cao
ce7d96a4a7 media: doc-rst: add yavta test example in ipu3 docs
This patch add yavta test command in ipu3.rst as an example on how to
run simple ImgU test using yavta.

Signed-off-by: Bingbu Cao <bingbu.cao@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 12:20:37 +02:00
Dafna Hirschfeld
4eaaf0861f media: doc-rst: in the RGB formats table add '-' in undefined bits
In the table of the RGB formats, add an explicit '-' signs
to cells that contain undefined bits.
This makes it more clear how many bits and bytes are used
for each format.

Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 11:45:18 +02:00
Steve Longerbeam
cdb82f826e media: imx.rst: Add example media graphs
Add the media graph topologies for the i.MX6Q SabreSD and SabreAuto.
This makes it easier to understand the topology and follow the
entity descriptions in the following sections.

Also clarify that the SabreSD and SabreLite media pipeline config examples
are for the i.MX6Q boards.

Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 11:35:49 +02:00
Ezequiel Garcia
ba445b7ff4 media: dt-bindings: rockchip-vpu: Convert bindings to json-schema
Convert Rockchip VPU (Hantro IP block) codec driver documentation to
json-schema.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 11:25:48 +02:00
Mauro Carvalho Chehab
d29e1ef4d6 media: docs: get rid of Documentation/media/
Now that everything got moved, we can get rid of the
old media directory.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 10:36:50 +02:00
Mauro Carvalho Chehab
b36343861b media: docs: add an uAPI chapter for driver-specific stuff
There are some uAPI stuff that are driver-specific. Add them
to the main media uAPI body.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 10:36:50 +02:00
Mauro Carvalho Chehab
577a7ad33a media: docs: move driver-specific info to driver-api
Those documents don't really describe the driver API.

Instead, they contain development-specific information.

Yet, as the main index file describes the content of it as:

	"how specific kernel subsystems work
	 from the point of view of a kernel developer"

It seems to be the better fit.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 10:36:18 +02:00
Mauro Carvalho Chehab
32e2eae23f media: docs: move user-facing docs to the admin guide
Most of the driver-specific documentation is meant to help
users of the media subsystem.

Move them to the admin-guide.

It should be noticed, however, that several of those files
are outdated and will require further work in order to make
them useful again.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 10:34:58 +02:00
Mauro Carvalho Chehab
2e9a7e0bc1 media: docs: move fourcc file to the uAPI document
This file gives a hint about how fourcc should be named.

It is on a very weird place, as such kind of thing belongs to the
uAPI guide.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 10:32:45 +02:00
Mauro Carvalho Chehab
ff768f596f media: docs: kAPI docs: move them to driver-api
All those documents describe the media driver API. So, move
them to the right place within the Kernel documentation.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 10:32:45 +02:00
Mauro Carvalho Chehab
54f38fcae5 media: docs: move uAPI book to userspace-api/media
Since 2017, there is an space reserved for userspace API,
created by changeset 1d596dee38 ("docs: Create a user-space API guide").

As the media subsystem was one of the first subsystems to use
Sphinx, until this patch, we were keeping things on a separate
place.

Let's just use the new location, as having all uAPI altogether
will likely make things easier for developers.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 10:31:49 +02:00
Mauro Carvalho Chehab
5dfb8db56b media: docs: split uAPI info from imx.rst
This file contains both driver develompent documentation and
userspace API.

Split on two, as they're usually read by different audiences.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 10:29:07 +02:00
Mauro Carvalho Chehab
889a500ed5 media: docs: split uAPI info from omap3isp.rst
This file contains both driver develompent documentation and
userspace API.

Split on two, as they're usually read by different audiences.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 10:29:07 +02:00
Mauro Carvalho Chehab
f8dd7a257d media: docs: split uAPI info from saa7134-devel.rst
This file contains both driver develompent documentation and
userspace API.

Split on two, as they're usually read by different audiences.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 10:29:07 +02:00
Mauro Carvalho Chehab
b4a5f46cde media: docs: split uAPI info from fimc.rst
This file contains both driver develompent documentation and
userspace API.

Split on two, as they're usually read by different audiences.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 10:29:07 +02:00
Mauro Carvalho Chehab
d81c969b95 media: docs: split uAPI info from davinci-vpbe.rst
This file contains both driver develompent documentation and
userspace API.

Split on two, as they're usually read by different audiences.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 10:29:07 +02:00
Mauro Carvalho Chehab
aeb9b21ab4 media: docs: split cx2341x.rst into different audiences
This file contains both driver develompent documentation
(basically, firmware documentation) and IVTV-specific
documentation about VBI and raw formats, focused on uAPI
development.

Split on two, as they're usually read by different audiences.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 10:29:06 +02:00
Mauro Carvalho Chehab
51df01acc1 media: docs: split development info from cx88.rst
This file contains both	admin and development stuff. Split on
two, as	they're	usually	read by	different audiences.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 10:29:06 +02:00
Mauro Carvalho Chehab
481025598f media: docs: split development info from bttv.rst
This file contains both admin and development stuff. Split on
two, as they're usually read by different audiences.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 10:29:06 +02:00
Mauro Carvalho Chehab
8d562a0038 media: docs: split vimc.rst into devel and admin parts
The vimc driver has some kerneldoc markups, plus admin info.
Split it into two files.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 10:29:06 +02:00
Mauro Carvalho Chehab
a6c5ac5ca7 media: docs: split meye.rst into admin and uAPI docs
Instead of placing both info from admin PoV and uAPI at the
same place, split into two separate documents.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 10:29:06 +02:00
Mauro Carvalho Chehab
f40b814a3d media: docs: split ci.rst into uAPI and user guide docs
The ci.rst file contains two parts: the first one describing
how to use the CA high level interface; the second one with
uAPI internals.

Split this on two separate files, adding the uAPI bits
to the DVB ca.rst configuration.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 10:29:06 +02:00
Mauro Carvalho Chehab
64a881836a media: docs: split cpia2.rst on two files
In order to be able to better organize the subsystem, split the
cpia2 information on two files: one user-facing and another one
from Kernel development PoV.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 10:29:06 +02:00
Mauro Carvalho Chehab
c8b667ac51 media: docs: move soc-camera.rst to staging
As the entire soc_camera driver is on staging to be removed
soon, let's place there its documentation too.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 10:29:06 +02:00
Mauro Carvalho Chehab
485f9a434c media: docs: avermedia.rst: mark a table as such
There's a table on this file, with aren't using the ReST
markups. Fix that.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 10:29:06 +02:00
Linus Torvalds
0785249f8b Time(keeping) updates:
- Fix the time_for_children symlink in /proc/$PID/ so it properly reflects
    that it part of the 'time' namespace
 
  - Add the missing userns limit for the allowed number of time namespaces,
    which was half defined but the actual array member was not added.  This
    went unnoticed as the array has an exessive empty member at the end but
    introduced a user visible regression as the output was corrupted.
 
  - Prevent further silent ucount corruption by adding a BUILD_BUG_ON() to
    catch half updated data.
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Merge tag 'timers-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull time(keeping) updates from Thomas Gleixner:

 - Fix the time_for_children symlink in /proc/$PID/ so it properly
   reflects that it part of the 'time' namespace

 - Add the missing userns limit for the allowed number of time
   namespaces, which was half defined but the actual array member was
   not added. This went unnoticed as the array has an exessive empty
   member at the end but introduced a user visible regression as the
   output was corrupted.

 - Prevent further silent ucount corruption by adding a BUILD_BUG_ON()
   to catch half updated data.

* tag 'timers-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  ucount: Make sure ucounts in /proc/sys/user don't regress again
  time/namespace: Add max_time_namespaces ucount
  time/namespace: Fix time_for_children symlink
2020-04-12 10:13:14 -07:00
Linus Torvalds
b032227c62 nios2 update for v5.7-rc1
MAINTAINERS: Remove nios2-dev@lists.rocketboards.org
 arch: nios2: remove 'resetvalue' property
 arch: nios2: rename 'altr,gpio-bank-width' -> 'altr,ngpio'
 arch: nios2: Enable the common clk subsystem on Nios2
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Merge tag 'nios2-v5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/lftan/nios2

Pull nios2 updates from Ley Foon Tan:

 - Remove nios2-dev@lists.rocketboards.org from MAINTAINERS

 - remove 'resetvalue' property

 - rename 'altr,gpio-bank-width' -> 'altr,ngpio'

 - enable the common clk subsystem on Nios2

* tag 'nios2-v5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/lftan/nios2:
  MAINTAINERS: Remove nios2-dev@lists.rocketboards.org
  arch: nios2: remove 'resetvalue' property
  arch: nios2: rename 'altr,gpio-bank-width' -> 'altr,ngpio'
  arch: nios2: Enable the common clk subsystem on Nios2
2020-04-11 11:38:44 -07:00
Linus Torvalds
b753101a4a Kbuild updates for v5.7 (2nd)
- raise minimum supported binutils version to 2.23
 
  - remove old CONFIG_AS_* macros that we know binutils >= 2.23 supports
 
  - move remaining CONFIG_AS_* tests to Kconfig from Makefile
 
  - enable -Wtautological-compare warnings to catch more issues
 
  - do not support GCC plugins for GCC <= 4.7
 
  - fix various breakages of 'make xconfig'
 
  - include the linker version used for linking the kernel into
    LINUX_COMPILER, which is used for the banner, and also exposed to
    /proc/version
 
  - link lib-y objects to vmlinux forcibly when CONFIG_MODULES=y,
    which allows us to remove the lib-ksyms.o workaround, and to
    solve the last known issue of the LLVM linker
 
  - add dummy tools in scripts/dummy-tools/ to enable all compiler
    tests in Kconfig, which will be useful for distro maintainers
 
  - support the single switch, LLVM=1 to use Clang and all LLVM utilities
    instead of GCC and Binutils.
 
  - support LLVM_IAS=1 to enable the integrated assembler, which is still
    experimental
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Merge tag 'kbuild-v5.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull more Kbuild updates from Masahiro Yamada:

 - raise minimum supported binutils version to 2.23

 - remove old CONFIG_AS_* macros that we know binutils >= 2.23 supports

 - move remaining CONFIG_AS_* tests to Kconfig from Makefile

 - enable -Wtautological-compare warnings to catch more issues

 - do not support GCC plugins for GCC <= 4.7

 - fix various breakages of 'make xconfig'

 - include the linker version used for linking the kernel into
   LINUX_COMPILER, which is used for the banner, and also exposed to
   /proc/version

 - link lib-y objects to vmlinux forcibly when CONFIG_MODULES=y, which
   allows us to remove the lib-ksyms.o workaround, and to solve the last
   known issue of the LLVM linker

 - add dummy tools in scripts/dummy-tools/ to enable all compiler tests
   in Kconfig, which will be useful for distro maintainers

 - support the single switch, LLVM=1 to use Clang and all LLVM utilities
   instead of GCC and Binutils.

 - support LLVM_IAS=1 to enable the integrated assembler, which is still
   experimental

* tag 'kbuild-v5.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (36 commits)
  kbuild: fix comment about missing include guard detection
  kbuild: support LLVM=1 to switch the default tools to Clang/LLVM
  kbuild: replace AS=clang with LLVM_IAS=1
  kbuild: add dummy toolchains to enable all cc-option etc. in Kconfig
  kbuild: link lib-y objects to vmlinux forcibly when CONFIG_MODULES=y
  MIPS: fw: arc: add __weak to prom_meminit and prom_free_prom_memory
  kbuild: remove -I$(srctree)/tools/include from scripts/Makefile
  kbuild: do not pass $(KBUILD_CFLAGS) to scripts/mkcompile_h
  Documentation/llvm: fix the name of llvm-size
  kbuild: mkcompile_h: Include $LD version in /proc/version
  kconfig: qconf: Fix a few alignment issues
  kconfig: qconf: remove some old bogus TODOs
  kconfig: qconf: fix support for the split view mode
  kconfig: qconf: fix the content of the main widget
  kconfig: qconf: Change title for the item window
  kconfig: qconf: clean deprecated warnings
  gcc-plugins: drop support for GCC <= 4.7
  kbuild: Enable -Wtautological-compare
  x86: update AS_* macros to binutils >=2.23, supporting ADX and AVX2
  crypto: x86 - clean up poly1305-x86_64-cryptogams.S by 'make clean'
  ...
2020-04-11 09:46:12 -07:00
Linus Torvalds
5b8b9d0c6d Merge branch 'akpm' (patches from Andrew)
Merge yet more updates from Andrew Morton:

 - Almost all of the rest of MM (memcg, slab-generic, slab, pagealloc,
   gup, hugetlb, pagemap, memremap)

 - Various other things (hfs, ocfs2, kmod, misc, seqfile)

* akpm: (34 commits)
  ipc/util.c: sysvipc_find_ipc() should increase position index
  kernel/gcov/fs.c: gcov_seq_next() should increase position index
  fs/seq_file.c: seq_read(): add info message about buggy .next functions
  drivers/dma/tegra20-apb-dma.c: fix platform_get_irq.cocci warnings
  change email address for Pali Rohár
  selftests: kmod: test disabling module autoloading
  selftests: kmod: fix handling test numbers above 9
  docs: admin-guide: document the kernel.modprobe sysctl
  fs/filesystems.c: downgrade user-reachable WARN_ONCE() to pr_warn_once()
  kmod: make request_module() return an error when autoloading is disabled
  mm/memremap: set caching mode for PCI P2PDMA memory to WC
  mm/memory_hotplug: add pgprot_t to mhp_params
  powerpc/mm: thread pgprot_t through create_section_mapping()
  x86/mm: introduce __set_memory_prot()
  x86/mm: thread pgprot_t through init_memory_mapping()
  mm/memory_hotplug: rename mhp_restrictions to mhp_params
  mm/memory_hotplug: drop the flags field from struct mhp_restrictions
  mm/special: create generic fallbacks for pte_special() and pte_mkspecial()
  mm/vma: introduce VM_ACCESS_FLAGS
  mm/vma: define a default value for VM_DATA_DEFAULT_FLAGS
  ...
2020-04-10 17:57:48 -07:00
Linus Torvalds
ca6151a978 A handful of late-arriving fixes for the documentation tree.
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Merge tag 'docs-5.7-2' of git://git.lwn.net/linux

Pull Documentation fixes from Jonathan Corbet:
 "A handful of late-arriving fixes for the documentation tree"

* tag 'docs-5.7-2' of git://git.lwn.net/linux:
  Documentation: android: binderfs: add 'stats' mount option
  Documentation: driver-api/usb/writing_usb_driver.rst Updates documentation links
  docs: driver-api: address duplicate label warning
  Documentation: sysrq: fix RST formatting
  docs: kernel-parameters.txt: Fix broken references
  docs: kernel-parameters.txt: Remove nompx
  docs: filesystems: fix typo in qnx6.rst
2020-04-10 17:53:43 -07:00
Linus Torvalds
4e4bdcfa21 orangefs: a fix and two cleanups and a merge conflict
Fix: Christoph Hellwig noticed that some logic I added to
      orangefs_file_read_iter introduced a race condition, so he
      sent a reversion patch. I had to modify his patch since
      reverting at this point broke Orangefs.
 
 Cleanup 1: Christoph Hellwig noticed that we were doing some unnecessary
            work in orangefs_flush, so he sent in a patch that removed
            the un-needed code.
 
 Cleanup 2: Al Viro told me he had trouble building Orangefs. Orangefs
            should be easy to build, even for Al :-). I looked back
            at the test server build notes in orangefs.txt, just in case
            that's where the trouble really is, and found a couple of
            typos and made a couple of clarifications.
 
 Merge Conflict: Stephen Rothwell reported that my modifications to
                 orangefs.txt caused a merge conflict with orangefs.rst
                 in Linux Next. I wasn't sure what to do, so I asked,
                 and Jonathan Corbet said not to worry about it and
                 just to report it to Linus.
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Merge tag 'for-linus-5.7-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux

Pull orangefs updates from Mike Marshall:
 "A fix and two cleanups.

  Fix:

   - Christoph Hellwig noticed that some logic I added to
     orangefs_file_read_iter introduced a race condition, so he sent a
     reversion patch. I had to modify his patch since reverting at this
     point broke Orangefs.

  Cleanups:

   - Christoph Hellwig noticed that we were doing some unnecessary work
     in orangefs_flush, so he sent in a patch that removed the un-needed
     code.

   - Al Viro told me he had trouble building Orangefs. Orangefs should
     be easy to build, even for Al :-).

     I looked back at the test server build notes in orangefs.txt, just
     in case that's where the trouble really is, and found a couple of
     typos and made a couple of clarifications"

* tag 'for-linus-5.7-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux:
  orangefs: clarify build steps for test server in orangefs.txt
  orangefs: don't mess with I_DIRTY_TIMES in orangefs_flush
  orangefs: get rid of knob code...
2020-04-10 17:50:01 -07:00
Pali Rohár
149ed3d404 change email address for Pali Rohár
For security reasons I stopped using gmail account and kernel address is
now up-to-date alias to my personal address.

People periodically send me emails to address which they found in source
code of drivers, so this change reflects state where people can contact
me.

[ Added .mailmap entry as per Joe Perches  - Linus ]
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Joe Perches <joe@perches.com>
Link: http://lkml.kernel.org/r/20200307104237.8199-1-pali@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-04-10 15:36:22 -07:00
Eric Biggers
6e71582506 docs: admin-guide: document the kernel.modprobe sysctl
Document the kernel.modprobe sysctl in the same place that all the other
kernel.* sysctls are documented.  Make sure to mention how to use this
sysctl to completely disable module autoloading, and how this sysctl
relates to CONFIG_STATIC_USERMODEHELPER.

[ebiggers@google.com: v5]
  Link: http://lkml.kernel.org/r/20200318230515.171692-4-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jeff Vander Stoep <jeffv@google.com>
Cc: Jessica Yu <jeyu@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: NeilBrown <neilb@suse.com>
Link: http://lkml.kernel.org/r/20200312202552.241885-4-ebiggers@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-04-10 15:36:22 -07:00
Roman Gushchin
cf11e85fc0 mm: hugetlb: optionally allocate gigantic hugepages using cma
Commit 944d9fec8d ("hugetlb: add support for gigantic page allocation
at runtime") has added the run-time allocation of gigantic pages.

However it actually works only at early stages of the system loading,
when the majority of memory is free.  After some time the memory gets
fragmented by non-movable pages, so the chances to find a contiguous 1GB
block are getting close to zero.  Even dropping caches manually doesn't
help a lot.

At large scale rebooting servers in order to allocate gigantic hugepages
is quite expensive and complex.  At the same time keeping some constant
percentage of memory in reserved hugepages even if the workload isn't
using it is a big waste: not all workloads can benefit from using 1 GB
pages.

The following solution can solve the problem:
1) On boot time a dedicated cma area* is reserved. The size is passed
   as a kernel argument.
2) Run-time allocations of gigantic hugepages are performed using the
   cma allocator and the dedicated cma area

In this case gigantic hugepages can be allocated successfully with a
high probability, however the memory isn't completely wasted if nobody
is using 1GB hugepages: it can be used for pagecache, anon memory, THPs,
etc.

* On a multi-node machine a per-node cma area is allocated on each node.
  Following gigantic hugetlb allocation are using the first available
  numa node if the mask isn't specified by a user.

Usage:
1) configure the kernel to allocate a cma area for hugetlb allocations:
   pass hugetlb_cma=10G as a kernel argument

2) allocate hugetlb pages as usual, e.g.
   echo 10 > /sys/kernel/mm/hugepages/hugepages-1048576kB/nr_hugepages

If the option isn't enabled or the allocation of the cma area failed,
the current behavior of the system is preserved.

x86 and arm-64 are covered by this patch, other architectures can be
trivially added later.

The patch contains clean-ups and fixes proposed and implemented by Aslan
Bakirov and Randy Dunlap.  It also contains ideas and suggestions
proposed by Rik van Riel, Michal Hocko and Mike Kravetz.  Thanks!

Signed-off-by: Roman Gushchin <guro@fb.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Andreas Schaufler <andreas.schaufler@gmx.de>
Acked-by: Mike Kravetz <mike.kravetz@oracle.com>
Acked-by: Michal Hocko <mhocko@kernel.org>
Cc: Aslan Bakirov <aslan@fb.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Joonsoo Kim <js1304@gmail.com>
Link: http://lkml.kernel.org/r/20200407163840.92263-3-guro@fb.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-04-10 15:36:21 -07:00
Linus Torvalds
75bdc9293d pwm: Changes for v5.7-rc1
There's quite a few changes this time around. Most of these are fixes
 and cleanups, but there's also new chip support for some drivers and a
 bit of rework.
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Merge tag 'pwm/for-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm

Pull pwm updates from Thierry Reding:
 "There's quite a few changes this time around.

  Most of these are fixes and cleanups, but there's also new chip
  support for some drivers and a bit of rework"

* tag 'pwm/for-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (33 commits)
  pwm: pca9685: Fix PWM/GPIO inter-operation
  pwm: Make pwm_apply_state_debug() static
  pwm: meson: Remove redundant assignment to variable fin_freq
  pwm: jz4740: Allow selection of PWM channels 0 and 1
  pwm: jz4740: Obtain regmap from parent node
  pwm: jz4740: Improve algorithm of clock calculation
  pwm: jz4740: Use clocks from TCU driver
  pwm: sun4i: Remove redundant needs_delay
  pwm: omap-dmtimer: Implement .apply callback
  pwm: omap-dmtimer: Do not disable PWM before changing period/duty_cycle
  pwm: omap-dmtimer: Fix PWM enabling sequence
  pwm: omap-dmtimer: Update description for PWM OMAP DM timer
  pwm: omap-dmtimer: Drop unused header file
  pwm: renesas-tpu: Drop confusing registered message
  pwm: renesas-tpu: Fix late Runtime PM enablement
  pwm: rcar: Fix late Runtime PM enablement
  dt-bindings: pwm: renesas-tpu: Document more R-Car Gen2 support
  pwm: meson: Fix confusing indentation
  pwm: pca9685: Use gpio core provided macro GPIO_LINE_DIRECTION_OUT
  pwm: pca9685: Replace CONFIG_PM with __maybe_unused
  ...
2020-04-10 12:55:20 -07:00
Linus Torvalds
6900433e0f Bug fixes for main IPMI driver, kcs updates
A couple of bug fixes for the main IPMI driver, one functional and two
 annotations.
 
 The kcs driver has some significant updates that have been pending for a
 while, but I forgot to include in next until a week ago.  But this code
 is only used by the people who are sending it to me, really, so it's not
 a big deal.  I did want it to sit in next for at least a week, and it did
 result in a fix.
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Merge tag 'for-linus-5.7-1' of git://github.com/cminyard/linux-ipmi

Pull IPMI updates from Corey Minyard:
 "Bug fixes for main IPMI driver, kcs updates

  A couple of bug fixes for the main IPMI driver, one functional and two
  annotations.

  The kcs driver has some significant updates that have been pending for
  a while, but I forgot to include in next until a week ago. But this
  code is only used by the people who are sending it to me, really, so
  it's not a big deal. I did want it to sit in next for at least a week,
  and it did result in a fix"

* tag 'for-linus-5.7-1' of git://github.com/cminyard/linux-ipmi:
  ipmi: kcs: Fix aspeed_kcs_probe_of_v1()
  ipmi: Add missing annotation for ipmi_ssif_lock_cond() and ipmi_ssif_unlock_cond()
  ipmi: kcs: aspeed: Implement v2 bindings
  ipmi: kcs: Finish configuring ASPEED KCS device before enable
  dt-bindings: ipmi: aspeed: Introduce a v2 binding for KCS
  ipmi: fix hung processes in __get_guid()
  drivers: char: ipmi: ipmi_msghandler: Pass lockdep expression to RCU lists
2020-04-10 12:43:42 -07:00
Linus Torvalds
4aafdf6883 sound fixes for 5.7-rc1
A collection of small fixes gathered since the previous update.
 
 * ALSA core:
 - Regression fix for OSS PCM emulation
 
 * ASoC:
 - Trivial fixes in reg bit mask ops, DAPM, DPCM and topology
 - Lots of fixes for Intel-based devices
 - Minor fixes for AMD, STM32, Qualcomm, Realtek
 
 * Others
 - Fixes for the bugs in mixer handling in HD-audio and ice1724
   drivers that were caught by the recent kctl validator
 - New quirks for HD-audio and USB-audio
 
 Also this contains a fix for EDD firmware fix, which slipped
 from anyone's hands.
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Merge tag 'sound-fix-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "A collection of small fixes gathered since the previous update.

  ALSA core:
   - Regression fix for OSS PCM emulation

  ASoC:
   - Trivial fixes in reg bit mask ops, DAPM, DPCM and topology
   - Lots of fixes for Intel-based devices
   - Minor fixes for AMD, STM32, Qualcomm, Realtek

  Others:
   - Fixes for the bugs in mixer handling in HD-audio and ice1724
     drivers that were caught by the recent kctl validator
   - New quirks for HD-audio and USB-audio

  Also this contains a fix for EDD firmware fix, which slipped from
  anyone's hands"

* tag 'sound-fix-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (35 commits)
  ALSA: hda: Add driver blacklist
  ALSA: usb-audio: Add mixer workaround for TRX40 and co
  ALSA: hda/realtek - Add quirk for MSI GL63
  ALSA: ice1724: Fix invalid access for enumerated ctl items
  ALSA: hda: Fix potential access overflow in beep helper
  ASoC: cs4270: pull reset GPIO low then high
  ALSA: hda/realtek - Add HP new mute led supported for ALC236
  ALSA: hda/realtek - Add supported new mute Led for HP
  ASoC: rt5645: Add platform-data for Medion E1239T
  ASoC: Intel: bytcr_rt5640: Add quirk for MPMAN MPWIN895CL tablet
  ASoC: stm32: sai: Add missing cleanup
  ALSA: usb-audio: Add registration quirk for Kingston HyperX Cloud Alpha S
  ASoC: Intel: atom: Fix uninitialized variable compiler warning
  ASoC: Intel: atom: Check drv->lock is locked in sst_fill_and_send_cmd_unlocked
  ASoC: Intel: atom: Take the drv->lock mutex before calling sst_send_slot_map()
  ASoC: SOF: Turn "firmware boot complete" message into a dbg message
  ALSA: usb-audio: Add Pioneer DJ DJM-250MK2 quirk
  ALSA: pcm: oss: Fix regression by buffer overflow fix (again)
  ALSA: pcm: oss: Fix regression by buffer overflow fix
  edd: Use scnprintf() for avoiding potential buffer overflow
  ...
2020-04-10 12:27:06 -07:00
Alexandru Ardelean
d00935affc arch: nios2: remove 'resetvalue' property
The 'altr,pio-1.0' driver does not handle the 'resetvalue', so remove it.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
2020-04-11 01:46:04 +08:00
Alexandru Ardelean
6dd5d3b8ad arch: nios2: rename 'altr,gpio-bank-width' -> 'altr,ngpio'
There is no more 'altr,gpio-bank-width' in the 'altr,pio-1.0' driver.
There is a 'altr,ngpio' which is  what the property wants to configure.

This change updates all occurrences of 'altr,gpio-bank-width' to
'altr,ngpio'.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
2020-04-11 01:45:52 +08:00
Linus Torvalds
d3e5e977ab More ACPI updates for 5.7-rc1
Prevent a false-positive static checker warning from triggering
 in the ACPI EC driver (Rafael Wysocki), fix white space in an
 ACPI document (Vilhelm Prytz) and add static annotation to one
 variable (Jason Yan).
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Merge tag 'acpi-5.7-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull more ACPI updates from Rafael Wysocki:
 "These prevent a false-positive static checker warning from triggering
  in the ACPI EC driver (Rafael Wysocki), fix white space in an ACPI
  document (Vilhelm Prytz) and add static annotation to one variable
  (Jason Yan)"

* tag 'acpi-5.7-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI, x86/boot: make acpi_nobgrt static
  Documentation: firmware-guide: ACPI: fix table alignment in namespace.rst
  ACPI: EC: Fix up fast path check in acpi_ec_add()
2020-04-10 09:52:15 -07:00
Randy Dunlap
befacdcf47 Documentation: android: binderfs: add 'stats' mount option
Add documentation of the binderfs 'stats' mount option.

Description taken from the commit message.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Link: https://lore.kernel.org/r/baa0aa81-007d-af46-16a5-91fead0bd1b9@infradead.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-04-10 10:14:53 -06:00
Linus Torvalds
5d30bcacd9 9p pull request for inclusion in 5.7 (take 2)
- Change read with O_NONBLOCK to allow incomplete read and return immediately
 (and document it)
 - Rest is just cleanup (indent, unused field in struct, extra semicolon)
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Merge tag '9p-for-5.7-2' of git://github.com/martinetd/linux

Pull 9p documentation update from Dominique Martinet:
 "Document the new O_NONBLOCK short read behavior"

* tag '9p-for-5.7-2' of git://github.com/martinetd/linux:
  9p: document short read behaviour with O_NONBLOCK
2020-04-08 21:51:14 -07:00
Linus Torvalds
fcc95f0640 The main items are:
- support for asynchronous create and unlink (Jeff Layton).  Creates
   and unlinks are satisfied locally, without waiting for a reply from
   the MDS, provided the client has been granted appropriate caps (new
   in v15.y.z ("Octopus") release).  This can be a big help for metadata
   heavy workloads such as tar and rsync.  Opt-in with the new nowsync
   mount option.
 
 - multiple blk-mq queues for rbd (Hannes Reinecke and myself).  When
   the driver was converted to blk-mq, we settled on a single blk-mq
   queue because of a global lock in libceph and some other technical
   debt.  These have since been addressed, so allocate a queue per CPU
   to enhance parallelism.
 
 - don't hold onto caps that aren't actually needed (Zheng Yan).  This
   has been our long-standing behavior, but it causes issues with some
   active/standby applications (synchronous I/O, stalls if the standby
   goes down, etc).
 
 - .snap directory timestamps consistent with ceph-fuse (Luis Henriques)
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Merge tag 'ceph-for-5.7-rc1' of git://github.com/ceph/ceph-client

Pull ceph updates from Ilya Dryomov:
 "The main items are:

   - support for asynchronous create and unlink (Jeff Layton).

     Creates and unlinks are satisfied locally, without waiting for a
     reply from the MDS, provided the client has been granted
     appropriate caps (new in v15.y.z ("Octopus") release). This can be
     a big help for metadata heavy workloads such as tar and rsync.
     Opt-in with the new nowsync mount option.

   - multiple blk-mq queues for rbd (Hannes Reinecke and myself).

     When the driver was converted to blk-mq, we settled on a single
     blk-mq queue because of a global lock in libceph and some other
     technical debt. These have since been addressed, so allocate a
     queue per CPU to enhance parallelism.

   - don't hold onto caps that aren't actually needed (Zheng Yan).

     This has been our long-standing behavior, but it causes issues with
     some active/standby applications (synchronous I/O, stalls if the
     standby goes down, etc).

   - .snap directory timestamps consistent with ceph-fuse (Luis
     Henriques)"

* tag 'ceph-for-5.7-rc1' of git://github.com/ceph/ceph-client: (49 commits)
  ceph: fix snapshot directory timestamps
  ceph: wait for async creating inode before requesting new max size
  ceph: don't skip updating wanted caps when cap is stale
  ceph: request new max size only when there is auth cap
  ceph: cleanup return error of try_get_cap_refs()
  ceph: return ceph_mdsc_do_request() errors from __get_parent()
  ceph: check all mds' caps after page writeback
  ceph: update i_requested_max_size only when sending cap msg to auth mds
  ceph: simplify calling of ceph_get_fmode()
  ceph: remove delay check logic from ceph_check_caps()
  ceph: consider inode's last read/write when calculating wanted caps
  ceph: always renew caps if mds_wanted is insufficient
  ceph: update dentry lease for async create
  ceph: attempt to do async create when possible
  ceph: cache layout in parent dir on first sync create
  ceph: add new MDS req field to hold delegated inode number
  ceph: decode interval_sets for delegated inos
  ceph: make ceph_fill_inode non-static
  ceph: perform asynchronous unlink if we have sufficient caps
  ceph: don't take refs to want mask unless we have all bits
  ...
2020-04-08 21:44:05 -07:00