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2018-02-01Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk Pull printk updates from Petr Mladek: - Add a console_msg_format command line option: The value "default" keeps the old "[time stamp] text\n" format. The value "syslog" allows to see the syslog-like "<log level>[timestamp] text" format. This feature was requested by people doing regression tests, for example, 0day robot. They want to have both filtered and full logs at hands. - Reduce the risk of softlockup: Pass the console owner in a busy loop. This is a new approach to the old problem. It was first proposed by Steven Rostedt on Kernel Summit 2017. It marks a context in which the console_lock owner calls console drivers and could not sleep. On the other side, printk() callers could detect this state and use a busy wait instead of a simple console_trylock(). Finally, the console_lock owner checks if there is a busy waiter at the end of the special context and eventually passes the console_lock to the waiter. The hand-off works surprisingly well and helps in many situations. Well, there is still a possibility of the softlockup, for example, when the flood of messages stops and the last owner still has too much to flush. There is increasing number of people having problems with printk-related softlockups. We might eventually need to get better solution. Anyway, this looks like a good start and promising direction. - Do not allow to schedule in console_unlock() called from printk(): This reverts an older controversial commit. The reschedule helped to avoid softlockups. But it also slowed down the console output. This patch is obsoleted by the new console waiter logic described above. In fact, the reschedule made the hand-off less effective. - Deprecate "%pf" and "%pF" format specifier: It was needed on ia64, ppc64 and parisc64 to dereference function descriptors and show the real function address. It is done transparently by "%ps" and "pS" format specifier now. Sergey Senozhatsky found that all the function descriptors were in a special elf section and could be easily detected. - Remove printk_symbol() API: It has been obsoleted by "%pS" format specifier, and this change helped to remove few continuous lines and a less intuitive old API. - Remove redundant memsets: Sergey removed unnecessary memset when processing printk.devkmsg command line option. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk: (27 commits) printk: drop redundant devkmsg_log_str memsets printk: Never set console_may_schedule in console_trylock() printk: Hide console waiter logic into helpers printk: Add console owner and waiter logic to load balance console writes kallsyms: remove print_symbol() function checkpatch: add pF/pf deprecation warning symbol lookup: introduce dereference_symbol_descriptor() parisc64: Add .opd based function descriptor dereference powerpc64: Add .opd based function descriptor dereference ia64: Add .opd based function descriptor dereference sections: split dereference_function_descriptor() openrisc: Fix conflicting types for _exext and _stext lib: do not use print_symbol() irq debug: do not use print_symbol() sysfs: do not use print_symbol() drivers: do not use print_symbol() x86: do not use print_symbol() unicore32: do not use print_symbol() sh: do not use print_symbol() mn10300: do not use print_symbol() ...
2018-01-16kallsyms: remove print_symbol() functionSergey Senozhatsky
No more print_symbol()/__print_symbol() users left, remove these symbols. It was a very old API that encouraged people use continuous lines. It had been obsoleted by %pS format specifier in a normal printk() call. Link: http://lkml.kernel.org/r/20180105102538.GC471@jagdpanzerIV Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Mark Salter <msalter@redhat.com> Cc: Tony Luck <tony.luck@intel.com> Cc: David Howells <dhowells@redhat.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Cc: Borislav Petkov <bp@alien8.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Fengguang Wu <fengguang.wu@intel.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: LKML <linux-kernel@vger.kernel.org> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-c6x-dev@linux-c6x.org Cc: linux-ia64@vger.kernel.org Cc: linux-am33-list@redhat.com Cc: linux-sh@vger.kernel.org Cc: linux-edac@vger.kernel.org Cc: x86@kernel.org Cc: linux-snps-arc@lists.infradead.org Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Suggested-by: Joe Perches <joe@perches.com> [pmladek@suse.com: updated commit message] Signed-off-by: Petr Mladek <pmladek@suse.com>
2017-11-23Merge tag 'docs-4.15-2' of git://git.lwn.net/linuxLinus Torvalds
Pull documentation updates from Jonathan Corbet: "A few late-arriving docs updates that have no real reason to wait. There's a new "Co-Developed-by" tag described by Greg, and a build enhancement from Willy to generate docs warnings during a kernel build (but only when additional warnings have been requested in general)" * tag 'docs-4.15-2' of git://git.lwn.net/linux: Add optional check for bad kernel-doc comments Documentation: fix profile= options in kernel-parameters.txt documentation/svga.txt: update outdated file kokr/memory-barriers.txt: Fix typo in paring example kokr/memory-barriers/txt: Replace uses of "transitive" Documentation/process: add Co-Developed-by: tag for patches with multiple authors
2017-11-20kokr/memory-barriers.txt: Fix typo in paring exampleSeongJae Park
This commit applies an upstream change, commit d92f842bb30f ("memory-barriers.txt: Fix typo in pairing example") to the Korean translation. Signed-off-by: SeongJae Park <sj38.park@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-11-20kokr/memory-barriers/txt: Replace uses of "transitive"SeongJae Park
This commit applies two upstream change, commit f1ab25a30ce8 ("memory-barriers: Replace uses of "transitive"") and commit 0902b1f44a72 ("memory-barriers: Rework multicopy-atomicity section") to the Korean translation. Those two changes are applied with this signle commit because the second change is improvement of the first one. Signed-off-by: SeongJae Park <sj38.park@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-11-16Merge tag 'pinctrl-v4.15-1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl Pull pin control updates from Linus Walleij: "This is the bulk of pin control changes for the v4.15 kernel cycle: Core: - The pin control Kconfig entry PINCTRL is now turned into a menuconfig option. This obviously has the implication of making the subsystem menu visible in menuconfig. This is happening because of two things: (a) Intel have started to deploy and depend on pin controllers in a way that is affecting users directly. This happens on the highly integrated laptop chipsets named after geographical places: baytrail, broxton, cannonlake, cedarfork, cherryview, denverton, geminilake, lewisburg, merrifield, sunrisepoint... It started a while back and now it is ever more evident that this is crucial infrastructure for x86 laptops and not an embedded obscurity anymore. Users need to be aware. (b) Pin control expanders on I2C and SPI that are arch-agnostic. Currently Semtech SX150X and Microchip MCP28x08 but more are expected. Users will have to be able to configure these in directly for their set-up. - Just go and select GPIOLIB now that we made sure that GPIOLIB is a very vanilla subsystem. Do not depend on it, if we need it, select it. - Exposing the pin control subsystem in menuconfig uncovered a bunch of obscure bugs that are now hopefully fixed, all more or less pertaining to Blackfin. - Unified namespace for cross-calls between pin control and GPIO. - New support for clock skew/delay generic DT bindings and generic pin config options for this. - Minor documentation improvements. Various: - The Renesas SH-PFC pin controller has evolved a lot. It seems Renesas are churning out new SoCs by the minute. - A bunch of non-critical fixes for the Rockchip driver. - Improve the use of library functions instead of open coding. - Support the MCP28018 variant in the MCP28x08 driver. - Static constifying" * tag 'pinctrl-v4.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (91 commits) pinctrl: gemini: Fix missing pad descriptions pinctrl: Add some depends on HAS_IOMEM pinctrl: samsung/s3c24xx: add CONFIG_OF dependency pinctrl: gemini: Fix GMAC groups pinctrl: qcom: spmi-gpio: Add pmi8994 gpio support pinctrl: ti-iodelay: remove redundant unused variable dev pinctrl: max77620: Use common error handling code in max77620_pinconf_set() pinctrl: gemini: Implement clock skew/delay config pinctrl: gemini: Use generic DT parser pinctrl: Add skew-delay pin config and bindings pinctrl: armada-37xx: Add edge both type gpio irq support pinctrl: uniphier: remove eMMC hardware reset pin-mux pinctrl: rockchip: Add iomux-route switching support for rk3288 pinctrl: intel: Add Intel Cedar Fork PCH pin controller support pinctrl: intel: Make offset to interrupt status register configurable pinctrl: sunxi: Enforce the strict mode by default pinctrl: sunxi: Disable strict mode for old pinctrl drivers pinctrl: sunxi: Introduce the strict flag pinctrl: sh-pfc: Save/restore registers for PSCI system suspend pinctrl: sh-pfc: r8a7796: Use generic IOCTRL register description ...
2017-10-24locking/barriers: Kill lockless_dereference()Will Deacon
lockless_dereference() is a nice idea, but it gained little traction in kernel code since its introduction three years ago. This is partly because it's a pain to type, but also because using READ_ONCE() instead has worked correctly on all architectures apart from Alpha, which is a fully supported but somewhat niche architecture these days. Now that READ_ONCE() has been upgraded to contain an implicit smp_read_barrier_depends() and the few callers of lockless_dereference() have been converted, we can remove lockless_dereference() altogether. Signed-off-by: Will Deacon <will.deacon@arm.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1508840570-22169-5-git-send-email-will.deacon@arm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-09-22pinctrl/gpio: Unify namespace for cross-callsLinus Walleij
The pinctrl_request_gpio() and pinctrl_free_gpio() break the nice namespacing in the other cross-calls like pinctrl_gpio_foo(). Just rename them and all references so we have one namespace with all cross-calls under pinctrl_gpio_*(). Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-09-08kokr/memory-barriers.txt: Apply atomic_t.txt changeSeongJae Park
This commit applies memory-barriers.txt part of upstream change, commit 706eeb3e9c6f ("Documentation/locking/atomic: Add documents for new atomic_t APIs") to Korean translation. Signed-off-by: SeongJae Park <sj38.park@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-09-08kokr/doc: Update memory-barriers.txt for read-to-write dependenciesSeongJae Park
This commit applies upstream change, commit 66ce3a4dcb9f ("doc: Update memory-barriers.txt for read-to-write dependencies") to Korean translation. Signed-off-by: SeongJae Park <sj38.park@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-09-04Merge branch 'linus' into locking/core, to fix up conflictsIngo Molnar
Conflicts: mm/page_alloc.c Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-08-10locking: Remove smp_mb__before_spinlock()Peter Zijlstra
Now that there are no users of smp_mb__before_spinlock() left, remove it entirely. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-07-23docs: Makefile: remove no-ops targetsMauro Carvalho Chehab
After removal of DocBook, those targets are bogus. Reported-by: Jim Davis <jim.epost@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-07-12kokr/memory-barriers.txt: Fix obsolete link to atomic_ops.txtSeongJae Park
Obsolete links to atomic_ops.txt exist in ko_KR/memory-barriers.txt though the file has moved to core-api/atomic_ops.rst. This commit fixes the obsolete links. Signed-off-by: SeongJae Park <sj38.park@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-06-22doc/kokr/howto: Only send regression fixes after -rc1SeongJae Park
This commit applies commit 388f9b20f98d ("Documentation/process/howto: Only send regression fixes after -rc1") to Korean translation. Signed-off-by: SeongJae Park <sj38.park@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-06-05Docs: Insert missing space to separate link from textSanjeev Gupta
Korean translation, there should be a space terminating the link. Acked-by: SeongJae Park <sj38.park@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-06-05doc/ko_KR/memory-barriers: Update control-dependencies exampleSeongJae Park
This commit applies upstream change, commit b26cfc48e3e0 ("doc: Update control-dependencies section of memory-barriers.txt"), to Korean translation. Signed-off-by: SeongJae Park <sj38.park@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-05-16docs: update old references for DocBook from the documentationMauro Carvalho Chehab
DocBook is mentioned several times at the documentation. Update the obsolete references from it at the DocBook. Acked-by: SeongJae Park <sj38.park@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-05-09docs: update references to the device io bookHelmut Grohne
While converting the deviceiobook from DocBook to RST, dangling references were left behind. This commit updates all remaining references to the new location. SeongJae Park improved the ko_KR translation. Fixes: 8a8a602fdb83 ("docs: Convert the deviceio template to RST") Signed-off-by: Helmut Grohne <h.grohne@intenta.de> Signed-off-by: SeongJae Park <sj38.park@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-04-08Documentation: Add HOWTO Japanese translation into rst based build systemTsugikazu Shibata
This commit adds Japanese translation of HOWTO document into rst based documentation build system with updates. Signed-off-by: Tsugikazu Shibata <tshibata@ab.jp.nec.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-03-31sparse doc: fix reference pathCao jin
Documentation/sparse.txt has been moved to Documentation/dev-tools/sparse.rst Signed-off-by: Cao jin <caoj.fnst@cn.fujitsu.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-03-03doc/ko_KR/memory-barriers: Update control-dependencies sectionSeongJae Park
This commit applies upstream change, commit c8241f8553e8 ("doc: Update control-dependencies section of memory-barriers.txt"), to Korean translation. Signed-off-by: SeongJae Park <sj38.park@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-02-15Documentation: Fix linux-api list typoTyler Hicks
A Japanese translation file contained the incorrect email address for the linux-api list. Signed-off-by: Tyler Hicks <tyhicks@canonical.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-02-06docs: Fix a warning in the Korean HOWTO.rst translationJonathan Corbet
An extra space in the wrong place made Sphinx unhappy; take it out. Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-01-26docs/zh_CN: Add coding-style into docs build systemAndy Deng
Tested by the command: make htmldocs During the compiling process, zh_CN/coding-style.rst has no errors and warnings generated, the generated html document has been checked. Signed-off-by: Andy Deng <theandy.deng@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-01-26zh_CN/CodingStyle: Convert to ReST markupAndy Deng
This commit applies all changes from the English version, and should be able to work with the documentation build system. Signed-off-by: Andy Deng <theandy.deng@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-01-26zh_CN/CodingStyle: improve translationAndy Deng
Some of the sentences in Chapters 19 and 20 are re-translated: - Fixed translation errors in Section 2 of Chapter 19 to prevent misleading readers; - Retranslate some sentences to make the translation more clear and accurate. Signed-off-by: Andy Deng <theandy.deng@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-12-16Documentation/sparse: drop __CHECK_ENDIAN__Michael S. Tsirkin
It's no longer used. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2016-11-19docs-rst: doc-guide: split the kernel-documentation.rst contentsMauro Carvalho Chehab
Having the kernel-documentation at the topmost level doesn't allow generating a separate PDF file for it. Also, makes harder to add extra contents. So, place it on a sub-dir. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-11-13Documentation: Add HOWTO Korean translation into rst based build systemSeongJae Park
This commit adds Korean translation of HOWTO document into rst based documentation build system. Signed-off-by: SeongJae Park <sj38.park@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-11-13Documentation: Move translations into a sub-directorySeongJae Park
Signed-off-by: SeongJae Park <sj38.park@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>