Commit graph

1335 commits

Author SHA1 Message Date
David S. Miller
8b0308fe31 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Rejecting non-native endian BTF overlapped with the addition
of support for it.

The rest were more simple overlapping changes, except the
renesas ravb binding update, which had to follow a file
move as well as a YAML conversion.

Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-05 18:40:01 -07:00
Rafael J. Wysocki
0b9688ee95 Merge back cpuidle material for 5.10.
* pm-cpuidle:
  cpuidle: record state entry rejection statistics
  cpuidle: psci: Allow PM domain to be initialized even if no OSI mode
  firmware: psci: Extend psci_set_osi_mode() to allow reset to PC mode
  ACPI: processor: Print more information when acpi_processor_evaluate_cst() fails
  cpuidle: tegra: Correctly handle result of arm_cpuidle_simple_enter()
2020-10-05 13:11:17 +02:00
Mauro Carvalho Chehab
463c43fcd9 Linux 5.9-rc7
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Merge tag 'v5.9-rc7' into patchwork

Linux 5.9-rc7

* tag 'v5.9-rc7': (683 commits)
  Linux 5.9-rc7
  mm/thp: Split huge pmds/puds if they're pinned when fork()
  mm: Do early cow for pinned pages during fork() for ptes
  mm/fork: Pass new vma pointer into copy_page_range()
  mm: Introduce mm_struct.has_pinned
  mm: validate pmd after splitting
  mm: don't rely on system state to detect hot-plug operations
  mm: replace memmap_context by meminit_context
  arch/x86/lib/usercopy_64.c: fix __copy_user_flushcache() cache writeback
  lib/memregion.c: include memregion.h
  lib/string.c: implement stpcpy
  mm/migrate: correct thp migration stats
  mm/gup: fix gup_fast with dynamic page table folding
  mm: memcontrol: fix missing suffix of workingset_restore
  mm, THP, swap: fix allocating cluster for swapfile by mistake
  mm: slab: fix potential double free in ___cache_free
  Documentation/llvm: Fix clang target examples
  io_uring: ensure async buffered read-retry is setup properly
  KVM: SVM: Add a dedicated INVD intercept routine
  io_uring: don't unconditionally set plug->nowait = true
  ...
2020-10-04 12:19:12 +02:00
Mauro Carvalho Chehab
7c9df3ec49 media: add Zoran cardlist
Now that Zoran was re-added, we need to add its cardlist
to the admin guide.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-10-03 10:34:54 +02:00
Jonathan Cameron
dc9e7860df docs: mm: numaperf.rst Add brief description for access class 1.
Try to make minimal changes to the document which already describes
access class 0 in a generic fashion (including IO initiatiors that
are not CPUs).

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2020-10-02 18:51:57 +02:00
Andrzej Pietrasiewicz
a27eb0cb4b tty/sysrq: Extend the sysrq_key_table to cover capital letters
All slots in sysrq_key_table[] are either used, reserved or at least
commented with their intended use. This patch adds capital letter versions
available, which means adding 26 more entries.

For already existing SysRq operations the user presses Alt-SysRq-<key>, and
for the newly added ones Alt-Shift-SysRq-<key>.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://lore.kernel.org/r/20200818112825.6445-2-andrzej.p@collabora.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-10-02 14:56:06 +02:00
Mauro Carvalho Chehab
ba9fe6443d media: admin-guide: update cardlists
Update them according with the current support on drivers.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-10-02 14:26:30 +02:00
Mauro Carvalho Chehab
210191dd53 media: siano: rename a duplicated card string
There are two different variants for Hauppauge WinTV MiniCard:

	[SMS1XXX_BOARD_HAUPPAUGE_TIGER_MINICARD] = {
		.name	= "Hauppauge WinTV MiniCard",
		.type	= SMS_NOVA_B0,
		.fw[DEVICE_MODE_DVBT_BDA] = SMS_FW_DVBT_HCW_55XXX,
		.default_mode = DEVICE_MODE_DVBT_BDA,
		.lna_ctrl  = 29,
		.board_cfg.foreign_lna0_ctrl = 29,
		.rf_switch = 17,
		.board_cfg.rf_switch_uhf = 17,
	},
	[SMS1XXX_BOARD_HAUPPAUGE_TIGER_MINICARD_R2] = {
		.name	= "Hauppauge WinTV MiniCard Rev 2",
		.type	= SMS_NOVA_B0,
		.fw[DEVICE_MODE_DVBT_BDA] = SMS_FW_DVBT_HCW_55XXX,
		.default_mode = DEVICE_MODE_DVBT_BDA,
		.lna_ctrl  = -1,
	},

As it can be seen, the RF part of the definitions are different.

So, better to use different names in order to distinguish
between them.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-10-02 14:25:12 +02:00
Mauro Carvalho Chehab
b97d4a1eb4 media: docs: ipu3.rst: rely at automarkup extension
There are several :c:type: definitions there, in order to
do cross-references with the driver's documentation.

Those are broken when docs are built with Sphinx 3.x, as
it would require :c:struct: instead.

For Sphinx < 3.x, the automarkup.py extension is able to do the
replacement already, and a future improvement on it should make
it also work with Sphinx 3.x.

So, get rid of the usage of the :c:type: macro there.

Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-09-30 18:50:03 +02:00
Yoann Congal
eac53b3e30 Documentation: PM: Fix a reStructuredText syntax error
Fix a reStructuredText syntax error in the cpuidle PM admin-guide
documentation: the ``...'' quotation marks are parsed as partial ''...''
reStructuredText markup and break the output formatting.

This change them to "...".

Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2020-09-30 17:40:37 +02:00
Bartosz Golaszewski
2fd1abe99e Documentation: gpio: add documentation for gpio-mockup
There's some documentation for gpio-mockup's debugfs interface in the
driver's source but it's not much. Add proper documentation for this
testing module.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-09-30 10:50:30 +02:00
Robin Murphy
0ba64770a2 perf: Add Arm CMN-600 PMU driver
Initial driver for PMU event counting on the Arm CMN-600 interconnect.
CMN sports an obnoxiously complex distributed PMU system as part of
its debug and trace features, which can do all manner of things like
sampling, cross-triggering and generating CoreSight trace. This driver
covers the PMU functionality, plus the relevant aspects of watchpoints
for simply counting matching flits.

Tested-by: Tsahi Zidenberg <tsahee@amazon.com>
Tested-by: Tuan Phan <tuanphan@os.amperecomputing.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
2020-09-28 18:50:20 +01:00
Dafna Hirschfeld
5cc0ebb218 media: admin-guide: add documentation file rkisp1.rst
Add the file 'rkisp1.rst' that documents the rkisp1 driver.

Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Acked-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-09-27 11:19:08 +02:00
Muchun Song
8d3fe09d8d mm: memcontrol: fix missing suffix of workingset_restore
We forget to add the suffix to the workingset_restore string, so fix it.

And also update the documentation of cgroup-v2.rst.

Fixes: 170b04b7ae ("mm/workingset: prepare the workingset detection infrastructure for anon LRU")
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Tejun Heo <tj@kernel.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Roman Gushchin <guro@fb.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Link: https://lkml.kernel.org/r/20200916100030.71698-1-songmuchun@bytedance.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-09-26 10:33:57 -07:00
J. Bruce Fields
e56dc9e294 nfsd: remove fault injection code
It was an interesting idea but nobody seems to be using it, it's buggy
at this point, and nfs4state.c is already complicated enough without it.
The new nfsd/clients/ code provides some of the same functionality, and
could probably do more if desired.

This feature has been deprecated since 9d60d93198 ("Deprecate nfsd
fault injection").

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2020-09-25 18:01:26 -04:00
Pavel Reichl
3442de9cc3 xfs: remove deprecated sysctl options
These optionr were for Irix compatibility, probably for clustered XFS
clients in a heterogenous cluster which contained both Irix & Linux
machines, so that behavior would be consistent. That doesn't exist anymore
and it's no longer needed.

Signed-off-by: Pavel Reichl <preichl@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
[darrick: actually state when the sysctls go away]
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2020-09-25 11:34:08 -07:00
Pavel Reichl
c23c393eaa xfs: remove deprecated mount options
ikeep/noikeep was a workaround for old DMAPI code which is no longer
relevant.

attr2/noattr2 - is for controlling upgrade behaviour from fixed attribute
fork sizes in the inode (attr1) and dynamic attribute fork sizes (attr2).
mkfs has defaulted to setting attr2 since 2007, hence just about every
XFS filesystem out there in production right now uses attr2.

Signed-off-by: Pavel Reichl <preichl@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
[darrick: fix minor typos]
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2020-09-25 11:34:08 -07:00
Christoph Hellwig
8c1c6c7588 Merge branch 'master' of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into dma-mapping-for-next
Pull in the latest 5.9 tree for the commit to revert the
V4L2_FLAG_MEMORY_NON_CONSISTENT uapi addition.
2020-09-25 06:19:19 +02:00
Randy Dunlap
307e3ee934 Documentation: kernel-parameters: clarify "module." parameters
The command-line parameters "dyndbg" and "async_probe" are not
parameters for kernel/module.c but instead they are for the
module that is being loaded. Try to make that distinction in the
help text.

OTOH, "module.sig_enforce" is handled as a parameter of kernel/module.c
so "module." is correct for it.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jessica Yu <jeyu@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Link: https://lore.kernel.org/r/67d40b6d-c073-a3bf-cbb6-6cad941cceeb@infradead.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-09-24 11:06:05 -06:00
Stephen Kitt
1013d4d910 docs: rewrite admin-guide/sysctl/abi.rst
Following the structure used in sysctl/kernel.rst, this updates
abi.rst to use ReStructured Text more fully and updates the entries to
match current kernels:

  * the list of files is now the table of contents;
  * links are used to point to other documentation and other sections;
  * all the existing entries are no longer present, so this removes
    them;
  * document vsyscall32.

Mentions of the kernel version are dropped. Since the document is
entirely rewritten, I've replaced the copyright statement.

Signed-off-by: Stephen Kitt <steve@sk2.org>
Link: https://lore.kernel.org/r/20200917072123.8847-1-steve@sk2.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-09-24 11:01:44 -06:00
Randy Dunlap
6b99e6e6aa Documentation/admin-guide: blockdev/ramdisk: remove use of "rdev"
Remove use of "rdev" from blockdev/ramdisk.rst and update
admin-guide/kernel-parameters.txt.

"rdev" is considered antiquated, ancient, archaic, obsolete, deprecated
{choose any or all}.

"rdev" was removed from util-linux in 2010:
  https://git.kernel.org/pub/scm/utils/util-linux/util-linux.git/commit/?id=a3e40c14651fccf18e7954f081e601389baefe3f

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Karel Zak <kzak@redhat.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Martin Mares <mj@ucw.cz>
Cc: linux-video@atrey.karlin.mff.cuni.cz
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Link: https://lore.kernel.org/r/20200918015640.8439-3-rdunlap@infradead.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-09-24 10:50:31 -06:00
Randy Dunlap
fc67d5bc87 Documentation/admin-guide: README & svga: remove use of "rdev"
"rdev" is considered antiquated, ancient, archaic, obsolete, deprecated
{choose any or all}.

Remove use of "rdev" and "vidmode" (a symlink to rdev) in
admin-guide/README.rst and admin-guide/svga.rst.

"rdev" was removed from util-linux in 2010:
  https://git.kernel.org/pub/scm/utils/util-linux/util-linux.git/commit/?id=a3e40c14651fccf18e7954f081e601389baefe3f

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Martin Mares <mj@ucw.cz>
Cc: Karel Zak <kzak@redhat.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Martin Mares <mj@ucw.cz>
Cc: linux-video@atrey.karlin.mff.cuni.cz
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Link: https://lore.kernel.org/r/20200918015640.8439-2-rdunlap@infradead.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-09-24 10:50:31 -06:00
Randy Dunlap
497de97e92 Documentation/admin-guide: kernel-parameters: capitalize Korina
Fix typo, capitalize Korina proper noun.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Link: https://lore.kernel.org/r/20200918054722.28713-1-rdunlap@infradead.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-09-24 10:48:24 -06:00
Randy Dunlap
622381e62d Documentation: admin-guide: kernel-parameters: reformat "lapic=" boot option
Reformat "lapic=" to try to make it more understandable and similar
to the style that is mostly used in this file.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/20200918054739.2523-1-rdunlap@infradead.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-09-24 10:48:02 -06:00
Randy Dunlap
7c42376e07 Documentation/admin-guide: kernel-parameters: fix "io7" parameter description
Fix punctuation and capitalization for the "io7" boot parameter.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Link: https://lore.kernel.org/r/20200918054751.6538-1-rdunlap@infradead.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-09-24 10:46:51 -06:00
Randy Dunlap
255bf90f84 Documentation/admin-guide: kernel-parameters: fix "disable_ddw" wording
Drop and extraneous word (if) in a sentence.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Link: https://lore.kernel.org/r/20200918054803.6588-1-rdunlap@infradead.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-09-24 10:46:15 -06:00
Tian Tao
c372e741ae Documentation: Remove CMA's dependency on architecture
CMA only depends on MMU. It doesn't depend on arch too much. such as ARM,
ARM64, X86, MIPS etc. so We remove the dependency of cma about the
architecture in kernel-parameters.txt.

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/1600412758-60545-1-git-send-email-tiantao6@hisilicon.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-09-24 10:44:53 -06:00
lijiang
1d11c35e71 docs: admin-guide: update kdump documentation due to change of crash URL
Since crash utility has been moved to github, the original URL is no
longer available. Let's update it accordingly.

Suggested-by: Dave Young <dyoung@redhat.com>
Signed-off-by: Lianbo Jiang <lijiang@redhat.com>
Link: https://lore.kernel.org/r/a088bff5-1174-25fa-ac26-6e46795f4085@redhat.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-09-24 10:43:07 -06:00
Randy Dunlap
4276948867 Documentation: kernel-parameters: fix formatting of MIPS "machtype"
For the "machtype" boot parameter,
fix word spacing, line wrap, and plural of "laptops".

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Link: https://lore.kernel.org/r/c9059e35-188d-a749-1907-767b53479328@infradead.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-09-24 10:38:40 -06:00
Satheesh Rajendran
aed26eebf5 Doc: admin-guide: Add entry for kvm_cma_resv_ratio kernel param
Add document entry for kvm_cma_resv_ratio kernel param which
is used to alter the KVM contiguous memory allocation percentage
for hash pagetable allocation used by hash mode PowerPC KVM guests.

Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>
Link: https://lore.kernel.org/r/20200921090220.14981-1-sathnaga@linux.vnet.ibm.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-09-24 10:36:49 -06:00
Lina Iyer
f49735f497 cpuidle: record state entry rejection statistics
CPUs may fail to enter the chosen idle state if there was a
pending interrupt, causing the cpuidle driver to return an error
value.

Record that and export it via sysfs along with the other idle state
statistics.

This could prove useful in understanding behavior of the governor
and the system during usecases that involve multiple CPUs.

Signed-off-by: Lina Iyer <ilina@codeaurora.org>
[ rjw: Changelog and documentation edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2020-09-23 14:10:31 +02:00
David S. Miller
3ab0a7a0c3 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Two minor conflicts:

1) net/ipv4/route.c, adding a new local variable while
   moving another local variable and removing it's
   initial assignment.

2) drivers/net/dsa/microchip/ksz9477.c, overlapping changes.
   One pretty prints the port mode differently, whilst another
   changes the driver to try and obtain the port mode from
   the port node rather than the switch node.

Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-22 16:45:34 -07:00
Milan Broz
4c07ae0ad4 dm crypt: document encrypted keyring key option
Commit 27f5411a71 ("dm crypt: support using encrypted keys")
introduced support for encrypted keyring type.

Fix documentation in admin guide to mention this type.

Fixes: 27f5411a71 ("dm crypt: support using encrypted keys")
Signed-off-by: Milan Broz <gmazyland@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2020-09-22 13:25:58 -04:00
Milan Broz
4a5caa4af0 dm crypt: document new no_workqueue flags
Commit 39d42fa96b ("dm crypt: add flags to optionally bypass kcryptd
workqueues") introduced new dm-crypt 'no_read_workqueue' and
'no_write_workqueue' flags.

Add documentation to admin guide for them.

Fixes: 39d42fa96b ("dm crypt: add flags to optionally bypass kcryptd workqueues")
Signed-off-by: Milan Broz <gmazyland@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2020-09-22 13:24:46 -04:00
John Ogness
74caba7f2a printk: move dictionary keys to dev_printk_info
Dictionaries are only used for SUBSYSTEM and DEVICE properties. The
current implementation stores the property names each time they are
used. This requires more space than otherwise necessary. Also,
because the dictionary entries are currently considered optional,
it cannot be relied upon that they are always available, even if the
writer wanted to store them. These issues will increase should new
dictionary properties be introduced.

Rather than storing the subsystem and device properties in the
dict ring, introduce a struct dev_printk_info with separate fields
to store only the property values. Embed this struct within the
struct printk_info to provide guaranteed availability.

Signed-off-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/87mu1jl6ne.fsf@jogness.linutronix.de
2020-09-22 11:27:48 +02:00
Stephen Kitt
9f35cf8bd7 docs: rewrite admin-guide/sysctl/abi.rst
Following the structure used in sysctl/kernel.rst, this updates
abi.rst to use ReStructured Text more fully and updates the entries to
match current kernels:

  * the list of files is now the table of contents;
  * links are used to point to other documentation and other sections;
  * all the existing entries are no longer present, so this removes
    them;
  * document vsyscall32.

Mentions of the kernel version are dropped. Since the document is
entirely rewritten, I've replaced the copyright statement.

Signed-off-by: Stephen Kitt <steve@sk2.org>
Link: https://lore.kernel.org/r/20200911190152.29730-1-steve@sk2.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-09-16 12:38:31 -06:00
Tian Tao
5b280ed427 Documentation: arm64 also supports disable hugeiomap
arm64 also supports disable hugeiomap,updated documentation.

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Link: https://lore.kernel.org/r/1599740386-47210-1-git-send-email-tiantao6@hisilicon.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-09-16 12:21:00 -06:00
Darrick J. Wong
b96cb835e3 xfs: deprecate the V4 format
The V4 filesystem format contains known weaknesses in the on-disk format
that make metadata verification diffiult.  In addition, the format does
not support dates past 2038 and will not be upgraded to do so.  We
should start the process of retiring the old format to close off attack
surfaces and to encourage users to migrate onto V5.

Therefore, make XFS V4 support a configurable option.  For the first
period it will be default Y in case some distributors want to withdraw
support early; for the second period it will be default N so that anyone
who wishes to continue support can do so; and after that, support will
be removed from the kernel.  Dates for these events have been added to
the upstream kernel.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
2020-09-15 20:52:43 -07:00
John Ogness
4cfc7258f8 printk: ringbuffer: add finalization/extension support
Add support for extending the newest data block. For this, introduce
a new finalization state (desc_finalized) denoting a committed
descriptor that cannot be extended.

Until a record is finalized, a writer can reopen that record to
append new data. Reopening a record means transitioning from the
desc_committed state back to the desc_reserved state.

A writer can explicitly finalize a record if there is no intention
of extending it. Also, records are automatically finalized when a
new record is reserved. This relieves writers of needing to
explicitly finalize while also making such records available to
readers sooner. (Readers can only traverse finalized records.)

Four new memory barrier pairs are introduced. Two of them are
insignificant additions (data_realloc:A/desc_read:D and
data_realloc:A/data_push_tail:B) because they are alternate path
memory barriers that exactly match the purpose, pairing, and
context of the two existing memory barrier pairs they provide an
alternate path for. The other two new memory barrier pairs are
significant additions:

desc_reopen_last:A / _prb_commit:B - When reopening a descriptor,
    ensure the state transitions back to desc_reserved before
    fully trusting the descriptor data.

_prb_commit:B / desc_reserve:D - When committing a descriptor,
    ensure the state transitions to desc_committed before checking
    the head ID to see if the descriptor needs to be finalized.

Signed-off-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20200914123354.832-6-john.ogness@linutronix.de
2020-09-15 16:35:27 +02:00
John Ogness
10dcb06d40 printk: ringbuffer: change representation of states
Rather than deriving the state by evaluating bits within the flags
area of the state variable, assign the states explicit values and
set those values in the flags area. Introduce macros to make it
simple to read and write state values for the state variable.

Although the functionality is preserved, the binary representation
for the states is changed.

Signed-off-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20200914123354.832-5-john.ogness@linutronix.de
2020-09-15 15:52:49 +02:00
Linus Torvalds
2a1a4bee5e Char / Misc driver fixes for 5.9-rc5
Here are a number of small driver fixes for 5.9-rc5
 
 Included in here are:
 	- habanalabs driver fixes
 	- interconnect driver fixes
 	- soundwire driver fixes
 	- dyndbg fixes for reported issues, and then reverts to fix it
 	  all up to a sane state.
 	- phy driver fixes
 Full details of these are in the shortlog.
 
 All of these have been in linux-next for a while with no reported
 issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-5.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char / misc driver fixes from Greg KH:
 "Here are a number of small driver fixes for 5.9-rc5

  Included in here are:

   - habanalabs driver fixes

   - interconnect driver fixes

   - soundwire driver fixes

   - dyndbg fixes for reported issues, and then reverts to fix it all up
     to a sane state.

   - phy driver fixes

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'char-misc-5.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  Revert "dyndbg: accept query terms like file=bar and module=foo"
  Revert "dyndbg: fix problem parsing format="foo bar""
  scripts/tags.sh: exclude tools directory from tags generation
  video: fbdev: fix OOB read in vga_8planes_imageblit()
  dyndbg: fix problem parsing format="foo bar"
  dyndbg: refine export, rename to dynamic_debug_exec_queries()
  dyndbg: give %3u width in pr-format, cosmetic only
  interconnect: qcom: Fix small BW votes being truncated to zero
  soundwire: fix double free of dangling pointer
  interconnect: Show bandwidth for disabled paths as zero in debugfs
  habanalabs: fix report of RAZWI initiator coordinates
  habanalabs: prevent user buff overflow
  phy: omap-usb2-phy: disable PHY charger detect
  phy: qcom-qmp: Use correct values for ipq8074 PCIe Gen2 PHY init
  soundwire: bus: fix typo in comment on INTSTAT registers
  phy: qualcomm: fix return value check in qcom_ipq806x_usb_phy_probe()
  phy: qualcomm: fix platform_no_drv_owner.cocci warnings
2020-09-13 08:52:21 -07:00
Greg Kroah-Hartman
952e934d7f Revert "dyndbg: accept query terms like file=bar and module=foo"
This reverts commit 14775b0496 as there
were still some parsing problems with it, and the follow-on patch for
it.

Let's revisit it later, just drop it for now.

Cc: <jbaron@akamai.com>
Cc: Jim Cromie <jim.cromie@gmail.com>
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Fixes: 14775b0496 ("dyndbg: accept query terms like file=bar and module=foo")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-09-10 18:45:03 +02:00
Arvind Sankar
0a4bb5e550 x86/fpu: Allow multiple bits in clearcpuid= parameter
Commit

  0c2a3913d6 ("x86/fpu: Parse clearcpuid= as early XSAVE argument")

changed clearcpuid parsing from __setup() to cmdline_find_option().
While the __setup() function would have been called for each clearcpuid=
parameter on the command line, cmdline_find_option() will only return
the last one, so the change effectively made it impossible to disable
more than one bit.

Allow a comma-separated list of bit numbers as the argument for
clearcpuid to allow multiple bits to be disabled again. Log the bits
being disabled for informational purposes.

Also fix the check on the return value of cmdline_find_option(). It
returns -1 when the option is not found, so testing as a boolean is
incorrect.

Fixes: 0c2a3913d6 ("x86/fpu: Parse clearcpuid= as early XSAVE argument")
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200907213919.2423441-1-nivedita@alum.mit.edu
2020-09-10 18:32:05 +02:00
Hans Verkuil
50044aa715 media: usbvision: remove deprecated driver
To quote the TODO of this driver:

--------------------------------------------------------------
The driver is deprecated and scheduled for removal by the end
of 2020.

In order to prevent removal the following actions would have to
be taken:

- clean up the code
- convert to the vb2 framework
- fix the disconnect and free-on-last-user handling (i.e., add
  a release callback for struct v4l2_device and rework the code
  to use that correctly).
--------------------------------------------------------------

Nobody picked this up, so it's time to retire this driver.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-09-10 14:06:27 +02:00
Ralph Campbell
50aab9b142 mm/doc: editorial pass on page migration
Add Sphinx reference links to HMM and CPUSETS, and numerous small
editorial changes to make the page_migration.rst document more readable.

Signed-off-by: Ralph Campbell <rcampbell@nvidia.com>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/20200902225247.15213-1-rcampbell@nvidia.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-09-09 11:39:46 -06:00
Coly Li
27c8700bd1 bcache: doc: update Documentation/admin-guide/bcache.rst
bcache.rst is from the original bcache.txt which was merged in mainline
kernel v3.10. There are a few things changed in the past 7 years. This
patch updates bache.rst documents in following content,
- Update bcache-tools git repo to,
  https://git.kernel.org/pub/scm/linux/kernel/git/colyli/bcache-tools.git/
- Update bcache kernel tree to mainline kernel tree,
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/
- make-bcache util is replaced by the unified bcache util,
  `make-bcache` now can be performed by `bcache make`

Signed-off-by: Coly Li <colyli@suse.de>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kent Overstreet <kent.overstreet@gmail.com>
Link: https://lore.kernel.org/r/20200821151354.16727-1-colyli@suse.de
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-09-09 11:31:19 -06:00
John Ogness
e60768311a scripts/gdb: update for lockless printk ringbuffer
With the introduction of the lockless printk ringbuffer, the data
structure for the kernel log buffer was changed. Update the gdb
scripts to be able to parse/print the new log buffer structure.

Fixes: 896fbe20b4 ("printk: use the lockless ringbuffer")
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Reported-by: Nick Desaulniers <ndesaulniers@google.com>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Tested-by: Petr Mladek <pmladek@suse.com>
[akpm@linux-foundation.org: A typo fix.]
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20200814212525.6118-3-john.ogness@linutronix.de
2020-09-08 09:33:15 +02:00
John Ogness
f8ff195ef1 docs: vmcoreinfo: add lockless printk ringbuffer vmcoreinfo
With the introduction of the lockless printk ringbuffer, the
VMCOREINFO relating to the kernel log buffer was changed. Update the
documentation to match those changes.

Fixes: 896fbe20b4 ("printk: use the lockless ringbuffer")
Reported-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20200814213316.6394-1-john.ogness@linutronix.de
2020-09-08 09:33:15 +02:00
Mauro Carvalho Chehab
d13ee586e0 Linux 5.9-rc4
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Merge tag 'v5.9-rc4' into patchwork

Linux 5.9-rc4

* tag 'v5.9-rc4': (1001 commits)
  Linux 5.9-rc4
  io_uring: fix linked deferred ->files cancellation
  io_uring: fix cancel of deferred reqs with ->files
  include/linux/log2.h: add missing () around n in roundup_pow_of_two()
  mm/khugepaged.c: fix khugepaged's request size in collapse_file
  mm/hugetlb: fix a race between hugetlb sysctl handlers
  mm/hugetlb: try preferred node first when alloc gigantic page from cma
  mm/migrate: preserve soft dirty in remove_migration_pte()
  mm/migrate: remove unnecessary is_zone_device_page() check
  mm/rmap: fixup copying of soft dirty and uffd ptes
  mm/migrate: fixup setting UFFD_WP flag
  mm: madvise: fix vma user-after-free
  checkpatch: fix the usage of capture group ( ... )
  fork: adjust sysctl_max_threads definition to match prototype
  ipc: adjust proc_ipc_sem_dointvec definition to match prototype
  mm: track page table modifications in __apply_to_page_range()
  MAINTAINERS: IA64: mark Status as Odd Fixes only
  MAINTAINERS: add LLVM maintainers
  MAINTAINERS: update Cavium/Marvell entries
  mm: slub: fix conversion of freelist_corrupted()
  ...
2020-09-07 16:13:06 +02:00
Jakub Kicinski
44a8c4f33c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
We got slightly different patches removing a double word
in a comment in net/ipv4/raw.c - picked the version from net.

Simple conflict in drivers/net/ethernet/ibm/ibmvnic.c. Use cached
values instead of VNIC login response buffer (following what
commit 507ebe6444 ("ibmvnic: Fix use-after-free of VNIC login
response buffer") did).

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-09-04 21:28:59 -07:00