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2019-03-26regulator: act8865: Constify regulator_opsAxel Lin
The act8865_ops and act8865_ldo_ops never need to be modified, make them const so compiler can put them to .rodata. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-26regulator: act8865: Convert to regulator core's simplified DT parsing codeAxel Lin
Use regulator core's simplified DT parsing code to simply the driver implementation. With this conversion, also move the NULL test against pdata in act8865_get_regulator_data() to the caller. This makes it clear the code path to explicitly set init_data is for non-DT case only. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-26regulator: sc2731: Constify regulatorsAxel Lin
The regulators array should never need to be modified, make it const so compiler can put it to .rodata. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-26regulator: da9063: convert header to SPDXWolfram Sang
Covnert the header of the source file to SPDX. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-25regulator: tps65217: Constify regulator_opsAxel Lin
These regulator_ops variables never need to be modified, make them const so compiler can put them to .rodata. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-25regulator: tps65218: Constify regulator_opsAxel Lin
These regulator_ops variables never need to be modified, make them const so compiler can put them to .rodata. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-25regulator: uniphier: Fix build dependencyAxel Lin
This driver does not use any syscon APIs, so remove MFD_SYSCON dependency. Select REGMAP_MMIO since this driver uses devm_regmap_init_mmio(). Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-21regulator: tps65086: Fix tps65086_ldoa1_ranges for selector 0xBAxel Lin
selector 0xB (1011) should be 2.6V rather than 2.7V, fit ix. Table 5-4. LDOA1 Output Voltage Options VID Bits VOUT VID Bits VOUT VID Bits VOUT VID Bits VOUT 0000 1.35 0100 1.8 1000 2.3 1100 2.85 0001 1.5 0101 1.9 1001 2.4 1101 3.0 0010 1.6 0110 2.0 1010 2.5 1110 3.3 0011 1.7 0111 2.1 1011 2.6 1111 Not Used Fixes: d2a2e729a666 ("regulator: tps65086: Add regulator driver for the TPS65086 PMIC") Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Andrew F. Davis <afd@ti.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-21regulator: add regulator_get_linear_step() stub helperArnd Bergmann
The regulator header has empty inline functions for most interfaces, but not regulator_get_linear_step(), which has just grown a user that does not depend on regulators otherwise: drivers/clk/tegra/clk-tegra124-dfll-fcpu.c: In function 'get_alignment_from_regulator': drivers/clk/tegra/clk-tegra124-dfll-fcpu.c:555:19: error: implicit declaration of function 'regulator_get_linear_step'; did you mean 'regulator_get_drvdata'? [-Werror=implicit-function-declaration] align->step_uv = regulator_get_linear_step(reg); ^~~~~~~~~~~~~~~~~~~~~~~~~ regulator_get_drvdata cc1: all warnings being treated as errors scripts/Makefile.build:278: recipe for target 'drivers/clk/tegra/clk-tegra124-dfll-fcpu.o' failed Add the missing stub along the others. Fixes: b3cf8d069505 ("clk: tegra: dfll: CVB calculation alignment with the regulator") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-21regulator: tps65217: Simplify linear range for selector 25-52Axel Lin
The original code separates the selector 25-52 into 2 ranges on purpose because DCDC1/DCDC3 only support up to 1.8V/1.5V in the old code. Both DCDC1 and DCDC3 support up to 3.3V since commit b4c2e158a1e1 ("regulator: tps65217: Allow DCDC1 and DCDC3 up to 3.3V"), so merge 25-30 and 31-52 ranges to one range. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-21regulator: tps65132: Constify tps65132_regulator_ops and tps_regs_descAxel Lin
The tps65132_regulator_ops and tps_regs_desc never need to be modified, make them const so compiler can put them to .rodata. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-21regulator: tps65132: Remove unneeded fields from struct tps65132_regulatorAxel Lin
These fields are not really need, remove them. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-20regulator: axp20x: Mark expected switch fall-throughsGustavo A. R. Silva
In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. This patch fixes the following warnings: drivers/regulator/axp20x-regulator.c: In function ‘axp20x_set_dcdc_freq’: drivers/regulator/axp20x-regulator.c:1023:7: warning: this statement may fall through [-Wimplicit-fallthrough=] reg = AXP803_DCDC_FREQ_CTRL; drivers/regulator/axp20x-regulator.c:1025:2: note: here case AXP806_ID: ^~~~ drivers/regulator/axp20x-regulator.c: In function ‘axp20x_set_dcdc_workmode’: drivers/regulator/axp20x-regulator.c:1115:7: warning: this statement may fall through [-Wimplicit-fallthrough=] reg = AXP806_DCDC_MODE_CTRL2; drivers/regulator/axp20x-regulator.c:1121:2: note: here case AXP221_ID: ^~~~ Notice that in this particular case, I moved the whole comment "Fall through to the check below.", which contains the "Fall through" comment, at the bottom of the case, which is what GCC is expecting to find. Warning level 3 was used: -Wimplicit-fallthrough=3 This patch is part of the ongoing efforts to enable -Wimplicit-fallthrough. Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-20regulator: gpio: Reword the binding documentMarek Vasut
Reword the binding document to make it clear how the propeties work and which properties affect which other properties. Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com> Cc: Harald Geyer <harald@ccbib.org> Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Mark Brown <broonie@kernel.org> Cc: Rob Herring <robh@kernel.org> Cc: linux-renesas-soc@vger.kernel.org To: devicetree@vger.kernel.org Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-20regulator: rn5t618: Constify regulator_descAxel Lin
The regulator_desc never need to be modified, so define them as const as a hint to the compiler that they can go into .rodata. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-20regulator: max8925: Convert to regulator core's simplified DT parsing codeAxel Lin
Use regulator core's simplified DT parsing code to simply the driver implementation. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-20regulator: of: Make regulator_of_get_init_node staticYueHaibing
Fix sparse warning: drivers/regulator/of_regulator.c:374:20: warning: symbol 'regulator_of_get_init_node' was not declared. Should it be static? Signed-off-by: YueHaibing <yuehaibing@huawei.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-19Merge tag 'v5.1-rc1' into regulator-5.2Mark Brown
Linux 5.1-rc1
2019-03-19regulator: axp20x: Use rdev_get_id at appropriate placesAxel Lin
Use rdev_get_id() to simplify the code a bit. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-19regulator: axp20x: Remove unneeded NULL test against rdevAxel Lin
rdev won't be NULL in .enable callback. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-19regulator: 88pm8607: Convert to regulator core's simplified DT parsing codeAxel Lin
Use regulator core's simplified DT parsing code to simply the driver implementation. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-18regulator: core: Fix application of "drop lockdep annotation in ↵Mark Brown
drms_uA_update()" [The original commit was sent against -next but needed to be sent as a bugfix, however -next had some additional changes which needed to be reverted. Now everything is all in one branch applying the rest of the changes to fix up the merge issue -- broonie] commit e5e21f70bfd3 ("regulator: core: Take lock before applying system load") took the regulator lock before calling drms_uA_update() in order to silence a lockdep warning during regulator_register(). However, we are not supposed to need locks at this point as the regulator is in the process of being registered, so there should be no possibility of concurrent access. Instead, remove the unnecessary locking and simply drop the lockdep annotation, since it is no longer valid. Fixes: e5e21f70bfd3 ("regulator: core: Take lock before applying system load") Signed-off-by: Niklas Cassel <niklas.cassel@linaro.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-18regulator: da9063: Convert to use regulator_set/get_current_limit_regmapAxel Lin
Use regulator_set/get_current_limit_regmap helpers to save some code. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Steve Twiss <stwiss@opensource.diasemi.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-18regulator: da9062: Convert to use regulator_set/get_current_limit_regmapAxel Lin
Use regulator_set/get_current_limit_regmap helpers to save some code. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Steve Twiss <stwiss@opensource.diasemi.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-18regulator: lp87565: Convert to use regulator_set/get_current_limit_regmapAxel Lin
Use regulator_set/get_current_limit_regmap helpers to save some code. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-18regulator: lp87565: Fix missing register for LP87565_BUCK_0Axel Lin
LP87565_BUCK_0 is missed, fix it. Fixes: f0168a9bf ("regulator: lp87565: Add support for lp87565 PMIC regulators") Signed-off-by: Axel Lin <axel.lin@ingics.com> Reviewed-by: Keerthy <j-keerthy@ti.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-18regulator: mt6397: Use unsigned int for volt_tablesAxel Lin
Make it consistent as .volt_table should be const unsigned int *. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-18regulator: mt6380: Use unsigned int for volt_tablesAxel Lin
Make it consistent as .volt_table should be const unsigned int *. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-18regulator: mt6323: Use unsigned int for volt_tablesAxel Lin
Make it consistent as .volt_table should be const unsigned int *. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-18regulator: max77650: Use unsigned int for max77651_sbb1_regulator_volt_tableAxel Lin
Make it consistent as .volt_table should be const unsigned int *. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-18regulator: as3711: Remove struct as3711_regulator_info and as3711_regulatorAxel Lin
This driver does not really need struct as3711_regulator_info and struct as3711_regulator, remove them. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-18regulator: cpcap: Convert to use of_device_get_match_dataAxel Lin
Use of_device_get_match_data to simplify the code a bit. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-18regulator: cpcap: Remove unneeded init_data settingAxel Lin
This driver is using regulator core's simplified DT parsing code, so regulator will call regulator_of_get_init_data() to get init_data. No need to set config.init_data. In additional, current code does not properly set the init_data setting, so just remove it. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-18regulator: as3722: Remove *rdevs[] from struct as3722_regulatorsAxel Lin
Current code is using devm_regulator_register() so it is not necessary to save as3722_regs->rdevs[id] for clean up. The *rdevs[] is not used now, remove it. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-18regulator: da9052: Include linux/of.h to fix build warning for of_match_ptrAxel Lin
Remove #ifdef CONFIG_OF guard so linux/of.h will be included when !CONFIG_OF. This fixes build warnings when !CONFIG_OF. Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Steve Twiss <stwiss.opensource@diasemi.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-17Linux 5.1-rc1Linus Torvalds
2019-03-17Merge tag 'kbuild-v5.1-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull more Kbuild updates from Masahiro Yamada: - add more Build-Depends to Debian source package - prefix header search paths with $(srctree)/ - make modpost show verbose section mismatch warnings - avoid hard-coded CROSS_COMPILE for h8300 - fix regression for Debian make-kpkg command - add semantic patch to detect missing put_device() - fix some warnings of 'make deb-pkg' - optimize NOSTDINC_FLAGS evaluation - add warnings about redundant generic-y - clean up Makefiles and scripts * tag 'kbuild-v5.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: kconfig: remove stale lxdialog/.gitignore kbuild: force all architectures except um to include mandatory-y kbuild: warn redundant generic-y Revert "modsign: Abort modules_install when signing fails" kbuild: Make NOSTDINC_FLAGS a simply expanded variable kbuild: deb-pkg: avoid implicit effects coccinelle: semantic code search for missing put_device() kbuild: pkg: grep include/config/auto.conf instead of $KCONFIG_CONFIG kbuild: deb-pkg: introduce is_enabled and if_enabled_echo to builddeb kbuild: deb-pkg: add CONFIG_ prefix to kernel config options kbuild: add workaround for Debian make-kpkg kbuild: source include/config/auto.conf instead of ${KCONFIG_CONFIG} unicore32: simplify linker script generation for decompressor h8300: use cc-cross-prefix instead of hardcoding h8300-unknown-linux- kbuild: move archive command to scripts/Makefile.lib modpost: always show verbose warning for section mismatch ia64: prefix header search path with $(srctree)/ libfdt: prefix header search paths with $(srctree)/ deb-pkg: generate correct build dependencies
2019-03-17Merge branch 'x86-asm-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 asm updates from Thomas Gleixner: "Two cleanup patches removing dead conditionals and unused code" * 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/asm: Remove unused __constant_c_x_memset() macro and inlines x86/asm: Remove dead __GNUC__ conditionals
2019-03-17Merge branch 'perf-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fixes from Thomas Gleixner: "Three fixes for the fallout from the TSX errata workaround: - Prevent memory corruption caused by a unchecked out of bound array index. - Two trivial fixes to address compiler warnings" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/x86/intel: Make dev_attr_allow_tsx_force_abort static perf/x86: Fixup typo in stub functions perf/x86/intel: Fix memory corruption
2019-03-17Merge tag 'for-linus-5.1b-rc1b-tag' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip Pull xen fix from Juergen Gross: "A fix for a Xen bug introduced by David's series for excluding ballooned pages in vmcores" * tag 'for-linus-5.1b-rc1b-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: xen/balloon: Fix mapping PG_offline pages to user space
2019-03-17Merge tag '9p-for-5.1' of git://github.com/martinetd/linuxLinus Torvalds
Pull 9p updates from Dominique Martinet: "Here is a 9p update for 5.1; there honestly hasn't been much. Two fixes (leak on invalid mount argument and possible deadlock on i_size update on 32bit smp) and a fall-through warning cleanup" * tag '9p-for-5.1' of git://github.com/martinetd/linux: 9p/net: fix memory leak in p9_client_create 9p: use inode->i_lock to protect i_size_write() under 32-bit 9p: mark expected switch fall-through
2019-03-17perf/x86/intel: Make dev_attr_allow_tsx_force_abort statickbuild test robot
Fixes: 400816f60c54 ("perf/x86/intel: Implement support for TSX Force Abort") Signed-off-by: kbuild test robot <lkp@intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org> Cc: kbuild-all@01.org Cc: Borislav Petkov <bp@alien8.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20190313184243.GA10820@lkp-sb-ep06
2019-03-17kconfig: remove stale lxdialog/.gitignoreMasahiro Yamada
When this .gitignore was added, lxdialog was an independent hostprogs-y. Now that all objects in lxdialog/ are directly linked to mconf, the lxdialog is no longer generated. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-03-17kbuild: force all architectures except um to include mandatory-yMasahiro Yamada
Currently, every arch/*/include/uapi/asm/Kbuild explicitly includes the common Kbuild.asm file. Factor out the duplicated include directives to scripts/Makefile.asm-generic so that no architecture would opt out of the mandatory-y mechanism. um is not forced to include mandatory-y since it is a very exceptional case which does not support UAPI. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-03-17kbuild: warn redundant generic-yMasahiro Yamada
The generic-y is redundant under the following condition: - arch has its own implementation - the same header is added to generated-y - the same header is added to mandatory-y If a redundant generic-y is found, the warning like follows is displayed: scripts/Makefile.asm-generic:20: redundant generic-y found in arch/arm/include/asm/Kbuild: timex.h I fixed up arch Kbuild files found by this. Suggested-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-03-17Revert "modsign: Abort modules_install when signing fails"Douglas Anderson
This reverts commit caf6fe91ddf62a96401e21e9b7a07227440f4185. The commit was fine but is no longer needed as of commit 3a2429e1faf4 ("kbuild: change if_changed_rule for multi-line recipe"). Let's go back to using ";" to be consistent. For some discussion, see: https://lkml.kernel.org/r/CAK7LNASde0Q9S5GKeQiWhArfER4S4wL1=R_FW8q0++_X3T5=hQ@mail.gmail.com Signed-off-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-03-17kbuild: Make NOSTDINC_FLAGS a simply expanded variableDouglas Anderson
During a simple no-op (nothing changed) build I saw 39 invocations of the C compiler with the argument "-print-file-name=include". We don't need to call the C compiler 39 times for this--one time will suffice. Let's change NOSTDINC_FLAGS to a simply expanded variable to avoid this since there doesn't appear to be any reason it should be recursively expanded. On my build this shaved ~400 ms off my "no-op" build. Note that the recursive expansion seems to date back to the (really old) commit e8f5bdb02ce0 ("[PATCH] Makefile include path ordering"). It's a little unclear to me if the point of that patch was to switch the variable to be recursively expanded (which it did) or to avoid directly assigning to NOSTDINC_FLAGS (AKA to switch to +=) because someone else (out of tree?) was setting it. I presume later since if the only goal was to switch to recursive expansion the patch would have just removed the ":". Signed-off-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-03-17kbuild: deb-pkg: avoid implicit effectsArseny Maslennikov
* The man page for dpkg-source(1) notes: > -b, --build directory [format-specific-parameters] > Build a source package (--build since dpkg 1.17.14). > <...> > > dpkg-source will build the source package with the first > format found in this ordered list: the format indicated > with the --format command line option, the format > indicated in debian/source/format, “1.0”. The fallback > to “1.0” is deprecated and will be removed at some point > in the future, you should always document the desired > source format in debian/source/format. See section > SOURCE PACKAGE FORMATS for an extensive description of > the various source package formats. Thus it would be more foolproof to explicitly use 1.0 (as we always did) than to rely on dpkg-source's defaults. * In a similar vein, debian/rules is not made executable by mkdebian, and dpkg-source warns about that but still silently fixes the file. Let's be explicit once again. Signed-off-by: Arseny Maslennikov <ar@cs.msu.ru> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-03-17coccinelle: semantic code search for missing put_device()Wen Yang
The of_find_device_by_node() takes a reference to the underlying device structure, we should release that reference. The implementation of this semantic code search is: In a function, for a local variable returned by calling of_find_device_by_node(), a, if it is released by a function such as put_device()/of_dev_put()/platform_device_put() after the last use, it is considered that there is no reference leak; b, if it is passed back to the caller via dev_get_drvdata()/platform_get_drvdata()/get_device(), etc., the reference will be released in other functions, and the current function also considers that there is no reference leak; c, for the rest of the situation, the current function should release the reference by calling put_device, this code search will report the corresponding error message. By using this semantic code search, we have found some object reference leaks, such as: commit 11907e9d3533 ("ASoC: fsl-asoc-card: fix object reference leaks in fsl_asoc_card_probe") commit a12085d13997 ("mtd: rawnand: atmel: fix possible object reference leak") commit 11493f26856a ("mtd: rawnand: jz4780: fix possible object reference leak") There are still dozens of reference leaks in the current kernel code. Further, for the case of b, the object returned to other functions may also have a reference leak, we will continue to develop other cocci scripts to further check the reference leak. Signed-off-by: Wen Yang <wen.yang99@zte.com.cn> Reviewed-by: Julia Lawall <Julia.Lawall@lip6.fr> Reviewed-by: Markus Elfring <Markus.Elfring@web.de> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-03-16Merge tag 'pidfd-v5.1-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux Pull pidfd system call from Christian Brauner: "This introduces the ability to use file descriptors from /proc/<pid>/ as stable handles on struct pid. Even if a pid is recycled the handle will not change. For a start these fds can be used to send signals to the processes they refer to. With the ability to use /proc/<pid> fds as stable handles on struct pid we can fix a long-standing issue where after a process has exited its pid can be reused by another process. If a caller sends a signal to a reused pid it will end up signaling the wrong process. With this patchset we enable a variety of use cases. One obvious example is that we can now safely delegate an important part of process management - sending signals - to processes other than the parent of a given process by sending file descriptors around via scm rights and not fearing that the given process will have been recycled in the meantime. It also allows for easy testing whether a given process is still alive or not by sending signal 0 to a pidfd which is quite handy. There has been some interest in this feature e.g. from systems management (systemd, glibc) and container managers. I have requested and gotten comments from glibc to make sure that this syscall is suitable for their needs as well. In the future I expect it to take on most other pid-based signal syscalls. But such features are left for the future once they are needed. This has been sitting in linux-next for quite a while and has not caused any issues. It comes with selftests which verify basic functionality and also test that a recycled pid cannot be signaled via a pidfd. Jon has written about a prior version of this patchset. It should cover the basic functionality since not a lot has changed since then: https://lwn.net/Articles/773459/ The commit message for the syscall itself is extensively documenting the syscall, including it's functionality and extensibility" * tag 'pidfd-v5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux: selftests: add tests for pidfd_send_signal() signal: add pidfd_send_signal() syscall