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* /proc/pid/status: add "Seccomp" fieldKees Cook2012-12-182-0/+10
| | | | | | | | | | | | | | | | | | | | | | | | It is currently impossible to examine the state of seccomp for a given process. While attaching with gdb and attempting "call prctl(PR_GET_SECCOMP,...)" will work with some situations, it is not reliable. If the process is in seccomp mode 1, this query will kill the process (prctl not allowed), if the process is in mode 2 with prctl not allowed, it will similarly be killed, and in weird cases, if prctl is filtered to return errno 0, it can look like seccomp is disabled. When reviewing the state of running processes, there should be a way to externally examine the seccomp mode. ("Did this build of Chrome end up using seccomp?" "Did my distro ship ssh with seccomp enabled?") This adds the "Seccomp" line to /proc/$pid/status. Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: James Morris <jmorris@namei.org> Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* procfs: add VmFlags field in smaps outputCyrill Gorcunov2012-12-182-2/+91
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | During c/r sessions we've found that there is no way at the moment to fetch some VMA associated flags, such as mlock() and madvise(). This leads us to a problem -- we don't know if we should call for mlock() and/or madvise() after restore on the vma area we're bringing back to life. This patch intorduces a new field into "smaps" output called VmFlags, where all set flags associated with the particular VMA is shown as two letter mnemonics. [ Strictly speaking for c/r we only need mlock/madvise bits but it has been said that providing just a few flags looks somehow inconsistent. So all flags are here now. ] This feature is made available on CONFIG_CHECKPOINT_RESTORE=n kernels, as other applications may start to use these fields. The data is encoded in a somewhat awkward two letters mnemonic form, to encourage userspace to be prepared for fields being added or removed in the future. [a.p.zijlstra@chello.nl: props to use for_each_set_bit] [sfr@canb.auug.org.au: props to use array instead of struct] [akpm@linux-foundation.org: overall redesign and simplification] [akpm@linux-foundation.org: remove unneeded braces per sfr, avoid using bloaty for_each_set_bit()] Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Pavel Emelyanov <xemul@parallels.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* proc: don't show nonexistent capabilitiesAndrew Vagin2012-12-181-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Without this patch it is really hard to interpret a bounding set, if CAP_LAST_CAP is unknown for a current kernel. Non-existant capabilities can not be deleted from a bounding set with help of prctl. E.g.: Here are two examples without/with this patch. CapBnd: ffffffe0fdecffff CapBnd: 00000000fdecffff I suggest to hide non-existent capabilities. Here is two reasons. * It's logically and easier for using. * It helps to checkpoint-restore capabilities of tasks, because tasks can be restored on another kernel, where CAP_LAST_CAP is bigger. Signed-off-by: Andrew Vagin <avagin@openvz.org> Cc: Andrew G. Morgan <morgan@kernel.org> Reviewed-by: Serge E. Hallyn <serge.hallyn@canonical.com> Cc: Pavel Emelyanov <xemul@parallels.com> Reviewed-by: Kees Cook <keescook@chromium.org> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: James Morris <jmorris@namei.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ptrace: introduce PTRACE_O_EXITKILLOleg Nesterov2012-12-183-1/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | Ptrace jailers want to be sure that the tracee can never escape from the control. However if the tracer dies unexpectedly the tracee continues to run in potentially unsafe mode. Add the new ptrace option PTRACE_O_EXITKILL. If the tracer exits it sends SIGKILL to every tracee which has this bit set. Note that the new option is not equal to the last-option << 1. Because currently all options have an event, and the new one starts the eventless group. It uses the random 20 bit, so we have the room for 12 more events, but we can also add the new eventless options below this one. Suggested by Amnon Shiloh. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Tested-by: Amnon Shiloh <u3557@miso.sublimeip.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Serge Hallyn <serge.hallyn@canonical.com> Cc: Chris Evans <scarybeasts@gmail.com> Cc: David Howells <dhowells@redhat.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* simple_strto*: annotate function as obsoleteEldad Zack2012-12-181-0/+8
| | | | | | | | | | | | | | Update the documentation for simple_strto* to reflect that it has been obsoleted and advise the usage of kstrto*. Signed-off-by: Eldad Zack <eldad@fogrefinery.com> Cc: J. Bruce Fields <bfields@fieldses.org> Cc: Joe Perches <joe@perches.com> Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Rob Landley <rob@landley.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kstrto*: add documentationEldad Zack2012-12-183-0/+100
| | | | | | | | | | | | | | | As Bruce Fields pointed out, kstrto* is currently lacking kerneldoc comments. This patch adds kerneldoc comments to common variants of kstrto*: kstrto(u)l, kstrto(u)ll and kstrto(u)int. Signed-off-by: Eldad Zack <eldad@fogrefinery.com> Cc: J. Bruce Fields <bfields@fieldses.org> Cc: Joe Perches <joe@perches.com> Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Rob Landley <rob@landley.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Documentation: fix Documentation/security/00-INDEXJarkko Sakkinen2012-12-181-0/+2
| | | | | | | | keys-ecryptfs.txt was missing from 00-INDEX. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fs/fat: strip "cp" prefix from codepage in displayDave Reisner2012-12-181-1/+2
| | | | | | | | | | | | | Option parsing code expects an unsigned integer for the codepage option, but prefixes and stores this option with "cp" before passing to load_nls(). This makes the displayed option in /proc an invalid one. Strip the prefix when printing so that the displayed option is valid for reuse. Signed-off-by: Dave Reisner <dreisner@archlinux.org> Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fat: ix mount option parsingJan Kara2012-12-181-11/+11
| | | | | | | | | | | | parse_options() is supposed to return value < 0 on error however we returned 0 (success) in a lot of cases. This actually was not a problem in practice because match_token() used by parse_options() is clever and catches most of the problems for us. Signed-off-by: Jan Kara <jack@suse.cz> Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fat: provide option for setting timezone offsetJan Kara2012-12-184-9/+37
| | | | | | | | | | | | | | | | | | | | So far FAT either offsets time stamps by sys_tz.minuteswest or leaves them as they are (when tz=UTC mount option is used). However in some cases it is useful if one can specify time stamp offset on his own (e.g. when time zone of the camera connected is different from time zone of the computer, or when HW clock is in UTC and thus sys_tz.minuteswest == 0). So provide a mount option time_offset= which allows user to specify offset in minutes that should be applied to time stamps on the filesystem. akpm: this code would work incorrectly when used via `mount -o remount', because cached inodes would not be updated. But fatfs's fat_remount() is basically a no-op anyway. Signed-off-by: Jan Kara <jack@suse.cz> Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fat: notify when discard is not supportedNamjae Jeon2012-12-181-0/+9
| | | | | | | | | | | | | Change fatfs so that a warning is emitted when an attempt is made to mount a filesystem with the unsupported `discard' option. ext4 aready does this: http://patchwork.ozlabs.org/patch/192668/ Signed-off-by: Namjae Jeon <linkinjeon@gmail.com> Signed-off-by: Amit Sahrawat <amit.sahrawat83@gmail.com> Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: DA9055 RTC driverAshish Jangam2012-12-183-0/+424
| | | | | | | | | | | | | A driver for the DA9055 PMIC. This has a dependency upon the DA9055 MFD core. Functionally tested on Samsung SMDKV6410. Signed-off-by: David Dajun Chen <dchen@diasemi.com> Signed-off-by: Ashish Jangam <ashish.jangam@kpitcummins.com> Cc: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/rtc/rtc-s3c: use of_match_ptr() macroSachin Kamat2012-12-181-3/+1Star
| | | | | | | | | This eliminates having an #ifdef returning NULL for the case when OF is disabled. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/rtc/rtc-tps65910.c: enable RTC power domain on initializationKim, Milo2012-12-181-0/+7
| | | | | | | | | | | | | | | | | | | | Enabling RTC HW block depends on the default value of TPS65910 register. In some mode, RTC block is disabled by default.(eg. AM3517 Craneboard) In this case, RTC_PWDN(RTC power down) bit should be cleared to enable the RTC HW block. This patch also works in case that RTC block is active by default, because there is no side effect even if the bit is updated again. Tested on AM3517 Craneboard. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Acked-by: Venu Byravarasu <vbyravarasu@nvidia.com> Cc: Samuel Ortiz <sameo@linux.intel.com> Cc: Sivaram Nair <sivaramn@nvidia.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/rtc/rtc-dev.c: remove unused code from rtc-dev.cSachin Kamat2012-12-181-19/+0Star
| | | | | | | | | This code is under #if 0 and not used. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/rtc/rtc-s3c.c: convert to use devm_* APITushar Behera2012-12-181-37/+8Star
| | | | | | | | | | | | | | rtc-s3c driver is modified to use devm_request_and_ioremap() (combining request_mem_region and ioremap), devm_clk_get() and devm_request_irq() APIs. Since this removes the necessity of freeing the related resources the return path is also simplified. Signed-off-by: Tushar Behera <tushar.behera@linaro.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/rtc/rtc-s3c.c: remove unnecessary err_nores labelTushar Behera2012-12-181-4/+1Star
| | | | | | | | | | | | err_nores label redirects to a simple return statement. Move the return statement to caller location and remove the label. Signed-off-by: Tushar Behera <tushar.behera@linaro.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: add NXP PCF8523 supportThierry Reding2012-12-183-0/+336
| | | | | | | | | | | Add an RTC driver for PCF8523 chips by NXP Semiconductors. No support is currently provided for the alarm and interrupt functions. Only the time and date functionality is implemented. Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: rtc-davinci: use devm_kzalloc()Devendra Naga2012-12-181-12/+4Star
| | | | | | | | | | | Use devm_kzalloc() and remove the error path free and the unload free as devm functions take care of freeing resources. Signed-off-by: Devendra Naga <devendra.aaru@gmail.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Miguel Aguilar <miguel.aguilar@ridgerun.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: rtc-davinci: return correct error code if rtc_device_register() failsDevendra Naga2012-12-181-2/+3
| | | | | | | | | | | rtc_device_register() returns a pointer containing error code in case of error. Use that in the error return. Signed-off-by: Devendra Naga <devendra.aaru@gmail.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Miguel Aguilar <miguel.aguilar@ridgerun.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/rtc/rtc-tps65910.c: rename irq to match deviceSivaram Nair2012-12-181-1/+1
| | | | | | | | | A cosmetic change to rename the irq name to match the device name. Signed-off-by: Sivaram Nair <sivaramn@nvidia.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: rtc-spear: Provide flag for no support of UIE modeDeepak Sikri2012-12-181-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The applications can set the RTC hardware to trigger interrupts in one of three modes: * AIE: Alarm interrupt * UIE: Update interrupt (ie: once per second) * PIE: Periodic interrupt (sub-second irqs) The above defined 3 modes are to be supported in the RTC HW in form of interrupts. The SPEAr RTC hardware does not support the later two modes. There have been refinements in the RTC core in mainline related to use of timer queue infrastructure to manage events in RTC. Please refer the below mentioned patch for details: * RTC: Rework RTC code to use timerqueue for events * SHA ID: 6610e0893b8bc6f59b14fed7f089c5997f035f88 There have been provisions added to support hardware that do not have support the UIE mode. Please refer the following patch. * rtc: Provide flag for rtc devices that don't support UIE * SHA ID: 4a649903f91232d02284d53724b0a45728111767 The patch makes use of the provision defined in the above patch to update the hardware status of UIE mode. Signed-off-by: Deepak Sikri <deepak.sikri@st.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: rtc-spear: Add clk_{un}prepare() supportDeepak Sikri2012-12-181-3/+3
| | | | | | | | | | | | clk_{un}prepare is mandatory for platforms using common clock framework. Because for SPEAr we don't do anything in clk_{un}prepare() calls, just call them once in probe/remove. Signed-off-by: Deepak Sikri <deepak.sikri@st.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: rtc-spear: use devm_*() routinesViresh Kumar2012-12-181-60/+29Star
| | | | | | | | | | | | Free the rtc-spear driver from tension of freeing resources :) devm_* derivatives of multiple routines are used while allocating resources, which would be freed automatically by kernel. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Cc: Deepak Sikri <deepak.sikri@st.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/rtc/rtc-test.c: avoid calling platform_device_put() twiceWei Yongjun2012-12-181-7/+7
| | | | | | | | | | | | | | | In case of error, test_init() needs to call platform_device_del() instead of platform_device_unregister(). Otherwise, we may call platform_device_put() twice. dpatch engine is used to auto generate this patch. (https://github.com/weiyj/dpatch) [akpm@linux-foundation.org: improve label naming] Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/rtc/rtc-vt8500.c: convert to use devm_kzallocDevendra Naga2012-12-181-10/+5Star
| | | | | | | | | | | Replace the kzalloc() and kfree() calls with devm_kzalloc(). Signed-off-by: Devendra Naga <devendra.aaru@gmail.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Alexey Charkov <alchark@gmail.com> Acked-by: Tony Prisk <linux@prisktech.co.nz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/rtc/rtc-imxdi.c: add devicetree supportRoland Stigge2012-12-182-0/+28
| | | | | | | | | | | | | Add device tree support to the rtc-imxdi driver. Signed-off-by: Roland Stigge <stigge@antcom.de> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Sascha Hauer <kernel@pengutronix.de> Cc: Russell King <linux@arm.linux.org.uk> Cc: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/rtc/rtc-imxdi: support for i.MX53Roland Stigge2012-12-181-1/+1
| | | | | | | | | | | | | Enable support for i.MX53 in addition to i.MX25 by enabling the driver on ARCH_MXC generally. Signed-off-by: Roland Stigge <stigge@antcom.de> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Sascha Hauer <kernel@pengutronix.de> Cc: Russell King <linux@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: omap: add runtime pm supportVaibhav Hiremath2012-12-181-0/+18
| | | | | | | | | | | | | | | | | | | | | | | OMAP1 RTC driver is used in multiple devices like, OMAPL138 and AM33XX. Driver currently doesn't handle any clocks, which may be right for OMAP1 architecture but in case of AM33XX, the clock/module needs to be enabled in order to access the registers. So convert this driver to runtime pm, which internally handles rest. [afzal@ti.com: handle error path] Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com> Signed-off-by: Afzal Mohammed <afzal@ti.com> Acked-by: Sekhar Nori <nsekhar@ti.com> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Sekhar Nori <nsekhar@ti.com> Cc: Kevin Hilman <khilman@ti.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Daniel Mack <zonque@gmail.com> Cc: Vaibhav Hiremath <hvaibhav@ti.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: omap: depend on am33xxAfzal Mohammed2012-12-181-4/+6
| | | | | | | | | | | | | | | | | rtc-omap driver can be reused for AM33xx RTC. Provide dependency in Kconfig. Signed-off-by: Afzal Mohammed <afzal@ti.com> Acked-by: Sekhar Nori <nsekhar@ti.com> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Sekhar Nori <nsekhar@ti.com> Cc: Kevin Hilman <khilman@ti.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Daniel Mack <zonque@gmail.com> Cc: Vaibhav Hiremath <hvaibhav@ti.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: omap: dt supportAfzal Mohammed2012-12-182-0/+35
| | | | | | | | | | | | | | | | Enhance rtc-omap driver with DT capability Signed-off-by: Afzal Mohammed <afzal@ti.com> Acked-by: Sekhar Nori <nsekhar@ti.com> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Sekhar Nori <nsekhar@ti.com> Cc: Kevin Hilman <khilman@ti.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Daniel Mack <zonque@gmail.com> Cc: Vaibhav Hiremath <hvaibhav@ti.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ARM: davinci: remove rtc kicker releaseAfzal Mohammed2012-12-181-12/+1Star
| | | | | | | | | | | | | | | | | | rtc-omap driver is now capable of handling kicker mechanism, hence remove kicker handling at platform level, instead provide proper device name so that driver can handle kicker mechanism by itself Signed-off-by: Afzal Mohammed <afzal@ti.com> Acked-by: Sekhar Nori <nsekhar@ti.com> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Sekhar Nori <nsekhar@ti.com> Cc: Kevin Hilman <khilman@ti.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Daniel Mack <zonque@gmail.com> Cc: Vaibhav Hiremath <hvaibhav@ti.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: omap: kicker mechanism supportAfzal Mohammed2012-12-181-3/+41
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | OMAP RTC IP can have kicker feature. This prevents spurious writes to register. To write to registers kicker lock has to be released. Procedure to do it as follows, 1. write to kick0 register, 0x83e70b13 2. write to kick1 register, 0x95a4f1e0 Writing value other than 0x83e70b13 to kick0 enables write locking, more details about kicker mechanism can be found in section 20.3.3.5.3 of AM335X TRM @www.ti.com/am335x Here id table information is added and is used to distinguish those that require kicker handling and the ones that doesn't need it. There are more features in the newer IP's compared to legacy ones other than kicker, which driver currently doesn't handle, supporting additional features would be easier with the addition of id table. Older IP (of OMAP1) doesn't have revision register as per TRM, so revision register can't be relied always to find features, hence id table is being used. While at it, replace __raw_writeb/__raw_readb with writeb/readb; this driver is used on ARMv7 (AM335X SoC) Signed-off-by: Afzal Mohammed <afzal@ti.com> Acked-by: Sekhar Nori <nsekhar@ti.com> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Sekhar Nori <nsekhar@ti.com> Cc: Kevin Hilman <khilman@ti.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Daniel Mack <zonque@gmail.com> Cc: Vaibhav Hiremath <hvaibhav@ti.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* binfmt_elf: fix corner case kfree of uninitialized dataAlan Cox2012-12-181-1/+3
| | | | | | | | | | | If elf_core_dump() is called and fill_note_info() fails in the kmalloc() then it returns 0 but has not yet initialised all the needed fields. As a result we do a kfree(randomness) after correctly skipping the thread data. [akpm@linux-foundation.org: checkpatch fixes] Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* checkpatch: warn on CamelCase variable namesJoe Perches2012-12-181-6/+13
| | | | | | | | | | Store the camelcase variables in a hash and only emit a warning on the first use of each new variable. Signed-off-by: Joe Perches <joe@perches.com> Cc: Andy Whitcroft <apw@canonical.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* checkpatch: add support for floating point constantsJoe Perches2012-12-181-1/+5
| | | | | | | | | | | | Even though the kernel doesn't support using floating point constants, add a regex for them. Support forms like: 0x123p1, 123e-1, 1.23, 1.5e23f Signed-off-by: Joe Perches <joe@perches.com> Cc: Andy Whitcroft <apw@canonical.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* checkpatch: find hex constants as a single IDENTJoe Perches2012-12-181-1/+1
| | | | | | | | | | | | | Hexadecimal values are current found in 2 parts. A hex constant like 0x123456abcdef is found as 0 and then x123456abcdef and later coalesced. Instead, reverse the order of the 2 searches in $Constant to find 0x first, then 0 so that the entire hex constant is found all at once. Signed-off-by: Joe Perches <joe@perches.com> Cc: Andy Whitcroft <apw@canonical.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* checkpatch: add --strict test for switch/default missing breakJoe Perches2012-12-181-2/+16
| | | | | | | | | | | | | | | | switch default case is sometimes written as "default:;". This can cause new cases added below the default to be defective. Suggest adding a break; after empty default cases to avoid fallthrough defects. Fixed indentation in the other semicolon test above it. Suggested-by: Peter Senna Tschudin <peter.senna@gmail.com> Signed-off-by: Joe Perches <joe@perches.com> Cc: Andy Whitcroft <apw@canonical.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* checkpatch: warn when declaring "struct spinlock foo;"Joe Perches2012-12-181-0/+6
| | | | | | | | | spinlock_t should always be used. Signed-off-by: Joe Perches <joe@perches.com> Acked-by: "Luis R. Rodriguez" <mcgrof@do-not-panic.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* checkpatch: Add --strict messages for blank lines around bracesJoe Perches2012-12-181-0/+10
| | | | | | | | | | | | | | | | | | | | | | | | Blank lines around braces are not unnecessary. Emit a message on the use of these blank lines only when using --strict. int foo(int bar) { something or other.... } is generally written in the kernel as: int foo(int bar) { something or other... } Signed-off-by: Joe Perches <joe@perches.com> Cc: Andy Whitcroft <apw@canonical.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* checkpatch: extend line continuation testJoe Perches2012-12-181-1/+3
| | | | | | | | | | Preprocessor directives and asm statements should be allowed to have a line continuation. Signed-off-by: Joe Perches <joe@perches.com> Tested-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* checkpatch: allow control over line length warning, default remains 80Joe Perches2012-12-181-3/+6
| | | | | | | | | | | | Some projects might want a longer line length so allow a command line --max-line-length=n control over the long line warnings. The default line length is 80. Signed-off-by: Joe Perches <joe@perches.com> Cc: Constantine Shulyupin <const@makelinux.com> Cc: Andy Whitcroft <apw@canonical.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* checkpatch: consolidate if (foo) bar(foo) checks and add debugfs_removeAndy Whitcroft2012-12-181-14/+6Star
| | | | | | | | | | | | | Consolidate the if (foo) bar(foo) detectors into a single check. Add debugfs_remove and family. Based on a patch by Constantine Shulyupin. Signed-off-by: Andy Whitcroft <apw@canonical.com> Cc: Constantine Shulyupin <const@MakeLinux.com>. Cc: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* checkpatch: remove reference to feature-removal-schedule.txtTao Ma2012-12-181-37/+0Star
| | | | | | | | | | | | In commit 9c0ece069b32 ("Get rid of Documentation/feature-removal.txt"), Linus removes feature-removal-schedule.txt from Documentation, but there is still some reference to this file. So remove them. Signed-off-by: Tao Ma <boyu.mt@taobao.com> Acked-by: Andy Whitcroft <apw@canonical.com> Cc: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* checkpatch: warn about using CONFIG_EXPERIMENTALKees Cook2012-12-181-0/+13
| | | | | | | | | | | | | This config item has not carried much meaning for a while now and is almost always enabled by default. As agreed during the Linux kernel summit, it is being removed. This will discourage future addition of CONFIG_EXPERIMENTAL while it is being phased out. Signed-off-by: Kees Cook <keescook@chromium.org> Cc: Andy Whitcroft <apw@canonical.com> Cc: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* checkpatch: warn on unnecessary line continuationsJoe Perches2012-12-181-0/+9
| | | | | | | | | | | When the previous line is not a line continuation and the current line has a line continuation but is not a #define, emit a warning. Signed-off-by: Joe Perches <joe@perches.com> Cc: Peter Hurley <peter@hurleysoftware.com> Cc: Andy Whitcroft <apw@canonical.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* compat: generic compat_sys_sched_rr_get_interval() implementationCatalin Marinas2012-12-1812-63/+29Star
| | | | | | | | | | | | | | | | | | | | This function is used by sparc, powerpc tile and arm64 for compat support. The patch adds a generic implementation with a wrapper for PowerPC to do the u32->int sign extension. The reason for a single patch covering powerpc, tile, sparc and arm64 is to keep it bisectable, otherwise kernel building may fail with mismatched function declarations. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Chris Metcalf <cmetcalf@tilera.com> [for tile] Acked-by: David S. Miller <davem@davemloft.net> Acked-by: Arnd Bergmann <arnd@arndb.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* lib/rbtree_test.c: fix uninitialized variable warningCong Ding2012-12-181-1/+1
| | | | | | | | | | | | Fix this warning: lib/rbtree_test.c: In function `check': lib/rbtree_test.c:121: warning: `blacks' may be used uninitialized in this function Signed-off-by: Cong Ding <dinggnu@gmail.com> Cc: Michel Lespinasse <walken@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* percpu_rw_semaphore: introduce CONFIG_PERCPU_RWSEMOleg Nesterov2012-12-184-1/+7
| | | | | | | | | | | | | | | | | Currently only block_dev and uprobes use percpu_rw_semaphore, add the config option selected by BLOCK || UPROBES. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: Anton Arapov <anton@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Michal Marek <mmarek@suse.cz> Cc: Mikulas Patocka <mpatocka@redhat.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* percpu_rw_semaphore: add lockdep annotationsOleg Nesterov2012-12-182-5/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add lockdep annotations. Not only this can help to find the potential problems, we do not want the false warnings if, say, the task takes two different percpu_rw_semaphore's for reading. IOW, at least ->rw_sem should not use a single class. This patch exposes this internal lock to lockdep so that it represents the whole percpu_rw_semaphore. This way we do not need to add another "fake" ->lockdep_map and lock_class_key. More importantly, this also makes the output from lockdep much more understandable if it finds the problem. In short, with this patch from lockdep pov percpu_down_read() and percpu_up_read() acquire/release ->rw_sem for reading, this matches the actual semantics. This abuses __up_read() but I hope this is fine and in fact I'd like to have down_read_no_lockdep() as well, percpu_down_read_recursive_readers() will need it. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: Anton Arapov <anton@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Michal Marek <mmarek@suse.cz> Cc: Mikulas Patocka <mpatocka@redhat.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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