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* Documentation: get rid of write_superArtem Bityutskiy2012-08-03
| | | | | | | | | The '->write_super' superblock method is gone, and this patch removes all the references to 'write_super' from various pieces of the kernel documentation. Cc: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: kill write_super and sync_supersArtem Bityutskiy2012-08-03
| | | | | | | | | | | | | | | | | | | | | | | Finally we can kill the 'sync_supers' kernel thread along with the '->write_super()' superblock operation because all the users are gone. Now every file-system is supposed to self-manage own superblock and its dirty state. The nice thing about killing this thread is that it improves power management. Indeed, 'sync_supers' is a source of monotonic system wake-ups - it woke up every 5 seconds no matter what - even if there were no dirty superblocks and even if there were no file-systems using this service (e.g., btrfs and journalled ext4 do not need it). So it was wasting power most of the time. And because the thread was in the core of the kernel, all systems had to have it. So I am quite happy to make it go away. Interestingly, this thread is a left-over from the pdflush kernel thread which was a self-forking kernel thread responsible for all the write-back in old Linux kernels. It was turned into per-block device BDI threads, and 'sync_supers' was a left-over. Thus, R.I.P, pdflush as well. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osdLinus Torvalds2012-08-03
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | Pull exofs update from Boaz Harrosh: "They are all mostly fixes, except the most important patch by Artem Bityutskiy which removes the use of s_dirt. After this patch s_dirt can be completely removed from the tree." * 'for-linus' of git://git.open-osd.org/linux-open-osd: ore: Fix out-of-bounds access in _ios_obj() exofs: Use proper max_IO calculations from ore exofs: Fix __r4w_get_page when offset is beyond i_size exofs: stop using s_dirt exofs: readpage_strip: Add a BUG_ON to check for PageLocked(page)
| * ore: Fix out-of-bounds access in _ios_obj()Boaz Harrosh2012-08-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | _ios_obj() is accessed by group_index not device_table index. The oc->comps array is only a group_full of devices at a time it is not like ore_comp_dev() which is indexed by a global device_table index. This did not BUG until now because exofs only uses a single COMP for all devices. But with other FSs like PanFS this is not true. This bug was only in the write_path, all other users were using it correctly [This is a bug since 3.2 Kernel] CC: Stable Tree <stable@kernel.org> Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
| * exofs: Use proper max_IO calculations from oreBoaz Harrosh2012-08-02
| | | | | | | | | | | | | | | | | | | | exofs_max_io_pages should just use the ORE's calculated layout->max_io_length, And avoid unnecessary BUGs, calculations made here were also a layering violation. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
| * exofs: Fix __r4w_get_page when offset is beyond i_sizeBoaz Harrosh2012-08-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It is very common for the end of the file to be unaligned on stripe size. But since we know it's beyond file's end then the XOR should be preformed with all zeros. Old code used to just read zeros out of the OSD devices, which is a great waist. But what scares me more about this situation is that, we now have pages attached to the file's mapping that are beyond i_size. I don't like the kind of bugs this calls for. Fix both birds, by returning a global ZERO_PAGE, if offset is beyond i_size. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
| * exofs: stop using s_dirtArtem Bityutskiy2012-08-02
| | | | | | | | | | | | | | | | | | | | | | | | | | Exofs has the '->write_super()' handler and makes some use of the '->s_dirt' superblock flag, but it really needs neither of them because it never sets 's_dirt' to one which means the VFS never calls its '->write_super()' handler. Thus, remove both. Note, I am trying to remove both 's_dirt' and 'write_super()' from VFS altogether once all users are gone. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
| * exofs: readpage_strip: Add a BUG_ON to check for PageLocked(page)Kautuk Consul2012-08-02
| | | | | | | | | | | | | | | | | | | | | | | | | | readpage_strip can be called from several code paths all of which require that the page be locked before any operations are carried out. Since we export the exofs_readpage callback to the VFS, add a BUG_ON to check for PageLocked(page) to make sure that this understanding is never compromised. Signed-off-by: Kautuk Consul <consul.kautuk@gmail.com> Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
* | Merge git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds2012-08-03
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull KVM bug fixes from Marcelo Tosatti: - Fix DS/ES segment register corruption on x86_32. - Fix kvmclock wallclock migration offset. - Fix PIT interrupt ACK vs system reset logic bug. * git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: VMX: Fix ds/es corruption on i386 with preemption KVM: x86: apply kvmclock offset to guest wall clock time KVM: PIC: call ack notifiers for irqs that are dropped form irr
| * | KVM: VMX: Fix ds/es corruption on i386 with preemptionAvi Kivity2012-08-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit b2da15ac26a0c ("KVM: VMX: Optimize %ds, %es reload") broke i386 in the following scenario: vcpu_load ... vmx_save_host_state vmx_vcpu_run (ds.rpl, es.rpl cleared by hardware) interrupt push ds, es # pushes bad ds, es schedule vmx_vcpu_put vmx_load_host_state reload ds, es (with __USER_DS) pop ds, es # of other thread's stack iret # other thread runs interrupt push ds, es schedule # back in vcpu thread pop ds, es # now with rpl=0 iret ... vcpu_put resume_userspace iret # clears ds, es due to mismatched rpl (instead of resume_userspace, we might return with SYSEXIT and then take an exception; when the exception IRETs we end up with cleared ds, es) Fix by avoiding the optimization on i386 and reloading ds, es on the lightweight exit path. Reported-by: Chris Clayron <chris2553@googlemail.com> Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * | KVM: x86: apply kvmclock offset to guest wall clock timeBruce Rogers2012-08-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When a guest migrates to a new host, the system time difference from the previous host is used in the updates to the kvmclock system time visible to the guest, resulting in a continuation of correct kvmclock based guest timekeeping. The wall clock component of the kvmclock provided time is currently not updated with this same time offset. Since the Linux guest caches the wall clock based time, this discrepency is not noticed until the guest is rebooted. After reboot the guest's time calculations are off. This patch adjusts the wall clock by the kvmclock_offset, resulting in correct guest time after a reboot. Cc: Zachary Amsden <zamsden@gmail.com> Signed-off-by: Bruce Rogers <brogers@suse.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * | KVM: PIC: call ack notifiers for irqs that are dropped form irrGleb Natapov2012-07-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | After commit 242ec97c358256 PIT interrupts are no longer delivered after PIC reset. It happens because PIT injects interrupt only if previous one was acked, but since on PIC reset it is dropped from irr it will never be delivered and hence acknowledged. Fix that by calling ack notifier on PIC reset. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* | | Merge tag 'sound-3.6' of ↵Linus Torvalds2012-08-03
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound Pull sound fixes from Takashi Iwai: "A bunch of small fixes for ASoC, mainly against regressions due to the defaulting regmap i/o, in addition to a HD-audio fixup." * tag 'sound-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: ASoC: core: Fix check before defaulting to regmap ALSA: hda - Support dock on Lenovo Thinkpad T530 with ALC269VC ASoC: wm8962: Allow VMID time to fully ramp ASoC: AC97 doesn't use regmap by default ASoC: sgtl5000: enable VAG_POWER for LINE_IN ASoC: ab8500: Inform SoC Core that we have our own I/O arrangements ASoC: omap: Add missing modules aliases to get sound working on omap devices sound: tegra_alc5632: Adjust to of_get_named_gpio() change sound: tegra_wm8903: Adjust to of_get_named_gpio() change ASoC: mc13783: Provide codec->control_data ASoC: ux500: Include the correct header files ASoC: wm8994: Hold runtime PM reference while handling mic and jack IRQs ASoC: sgtl5000: remove unneeded snd_soc_dapm_new_widgets in probe ASoC: mxs-saif: set a base clock rate for EXTMASTER mode work ASoC: mxs-saif: fix clock prepare and enable unbalance issue ASoC: wm8994: Ensure there are enough BCLKs for four channels
| * \ \ Merge tag 'asoc-3.6' of ↵Takashi Iwai2012-08-02
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus ASoC: Additional updates for 3.6 A few updates for issues discovered during the merge window, the main one being the fix for the issues with defaulting to use of regmap without properly checking if there was I/O in place already.
| | * | | ASoC: core: Fix check before defaulting to regmapMark Brown2012-08-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Check if the chip has provided a write operation (which is mandatory for I/O) rather than looking for control data as some of the MFDs use a global for this. Also skip the attempt if there's no regmap available by device in case things get confused by the attempt to default. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Tested-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
| | * | | ASoC: wm8962: Allow VMID time to fully rampMark Brown2012-07-31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Required for reliable power up from cold. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Cc: stable@vger.kernel.org
| | * | | ASoC: AC97 doesn't use regmap by defaultManuel Lauss2012-07-31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since commit 38cbf9598feba97de9f9b43efa9153fd7c1a2ec9 ("ASoC: core: Try to use regmap if the driver doesn't set up any I/O") any ASoC codec which doesn't set codec::control_data is assumed to use regmap. That doesn't work with AC97 so this workaround sets the codec::control_data member to a random value to restore proper behaviour. Tested with WM9712. Signed-off-by: Manuel Lauss <manuel.lauss@googlemail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * | | ASoC: sgtl5000: enable VAG_POWER for LINE_INDong Aisheng2012-07-31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | LINE_IN also needs VAG_POWER on or we may hear noise when directly route LINE_IN to Headphone Mux. Tested on imx28evk. Signed-off-by: Dong Aisheng <dong.aisheng@linaro.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * | | ASoC: ab8500: Inform SoC Core that we have our own I/O arrangementsLee Jones2012-07-31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If codec->control_data is not populated SoC Core assumes we want to use regmap, which fails catastrophically, as we don't have one: Unable to handle kernel NULL pointer dereference at virtual address 00000080 pgd = c0004000 [00000080] *pgd=00000000 Internal error: Oops: 17 [#1] PREEMPT SMP ARM Modules linked in: CPU: 1 Not tainted (3.5.0-rc6-00884-g0b2419e-dirty #130) PC is at regmap_read+0x10/0x5c LR is at hw_read+0x80/0x90 pc : [<c01a91b8>] lr : [<c0216804>] psr: 60000013 Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * | | ASoC: omap: Add missing modules aliases to get sound working on omap devicesGuillaume Gardet2012-07-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch add missing modules aliases to get sound working on omap devices. Tested on Beagleboard xM rev. B. This patch is against 3.5-rc6 vanilla. Signed-off-by: Guillaume GARDET <guillaume.gardet@free.fr> Signed-off-by: Mans Rullgard <mans.rullgard@linaro.org> From 18b1ba8becc3dd256bdaad2d825f46b551debda3 Mon Sep 17 00:00:00 2001 From: Guillaume GARDET <guillaume.gardet@oliseo.fr> Date: Tue, 10 Jul 2012 13:47:16 +0200 Subject: [PATCH] Add missing modules aliases to fix audio on omap devices Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * | | sound: tegra_alc5632: Adjust to of_get_named_gpio() changeRoland Stigge2012-07-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | of_get_named_gpio() was changed to return -EPROBE_DEFER in case of gpios not probed yet. This patch adjusts tegra_alc5632 to this. Signed-off-by: Roland Stigge <stigge@antcom.de> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * | | sound: tegra_wm8903: Adjust to of_get_named_gpio() changeRoland Stigge2012-07-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | of_get_named_gpio() was changed to return -EPROBE_DEFER in case of gpios not probed yet. This patch adjusts tegra_wm8903 to this. Signed-off-by: Roland Stigge <stigge@antcom.de> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * | | ASoC: mc13783: Provide codec->control_dataFabio Estevam2012-07-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If codec->control_data is not provided, the following crash happens: Unable to handle kernel NULL pointer dereference at virtual address 00000078 pgd = 80004000 [00000078] *pgd=00000000 Internal error: Oops: 5 [#1] SMP ARM Modules linked in: CPU: 0 Tainted: G W (3.5.0-next-20120725+ #1263) PC is at regmap_read+0x18/0x64 LR is at hw_read+0x50/0x98 pc : [<802bcd90>] lr : [<803cad18>] psr: 60000013 ... Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * | | ASoC: ux500: Include the correct header filesLee Jones2012-07-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Thought to be another merge error, board-mop500-msp.h has never existed in the upstream kernel, only msp.h. This patch changes the include files to match the existing file name. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * | | ASoC: wm8994: Hold runtime PM reference while handling mic and jack IRQsMark Brown2012-07-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Ensures that we don't interact badly with the power management framework, especially in the cases where we're doing deferred work or we're using a direct GPIO for these signals. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * | | ASoC: sgtl5000: remove unneeded snd_soc_dapm_new_widgets in probeDong Aisheng2012-07-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There's a driver bug that sgtl5000 dapm widget kcontrols do not work. e.g. can not select capture mux with amixer tool(no error info prompted). The root cause is that we still call snd_soc_dapm_new_widgets in codec driver probe function afer converting to table based widgets. This will cause the card dapm widgets are instantiated before the dapm_routes are registered. Then, no available dapm widget pathes can be found during instantiation which finally will cause soc_dapm_mux_update_power to fail(can not find correct path with kcontrol) in snd_soc_dapm_put_enum_double function. Here we remove the unneeded snd_soc_dapm_new_widgets in codec probe and let the soc core to handle the register sequence properly. Then we can fix above issue. Signed-off-by: Dong Aisheng <dong.aisheng@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * | | ASoC: mxs-saif: set a base clock rate for EXTMASTER mode workDong Aisheng2012-07-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Set an initial clock rate for the saif internal logic to work properly. This is important when working in EXTMASTER mode that uses the other saif's BITCLK&LRCLK but it still needs a basic clock which should be fast enough for the internal logic. Signed-off-by: Dong Aisheng <dong.aisheng@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * | | ASoC: mxs-saif: fix clock prepare and enable unbalance issueDong Aisheng2012-07-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently we directly call a clock_enable in trigger function without a clk_prepare as pair first. This will cause system hang immediately when run capture because the clock was not prepared(playback does not hang because the clock was prepared already by get_mclk before), a warning message in clock framework may cause a deadlock to reclaim clock lock (see: pl011_console_write). Here we prepare clock first in hw_param, then enable it in trigger function to guarantee the balance. Signed-off-by: Dong Aisheng <dong.aisheng@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * | | ASoC: wm8994: Ensure there are enough BCLKs for four channelsMark Brown2012-07-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Otherwise if someone tries to use all four channels on AIF1 with the device in master mode we won't be able to clock out all the data. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Cc: stable@vger.kernel.org
| * | | | ALSA: hda - Support dock on Lenovo Thinkpad T530 with ALC269VCTakashi Iwai2012-08-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Lenovo Thinkpad T530 with ALC269VC codec has a dock port but BIOS doesn't set up the pins properly. Enable the pins as well as on Thinkpad X230 Tablet. Reported-and-tested-by: Mario <anyc@hadiko.de> Cc: <stable@vger.kernel.org> [v3.2+] Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | | | | Merge branch 'core-urgent-for-linus' of ↵Linus Torvalds2012-08-03
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull futex fixes from Ingo Molnar: "A couple of futex fixes from Darren Hart: two bugs reported by Dave Jones (found with his trinity test) and Dan Carpenter through static analysis. The third found while debugging the first two." * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: futex: Forbid uaddr == uaddr2 in futex_wait_requeue_pi() futex: Fix bug in WARN_ON for NULL q.pi_state futex: Test for pi_mutex on fault in futex_wait_requeue_pi()
| * | | | | futex: Forbid uaddr == uaddr2 in futex_wait_requeue_pi()Darren Hart2012-07-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If uaddr == uaddr2, then we have broken the rule of only requeueing from a non-pi futex to a pi futex with this call. If we attempt this, as the trinity test suite manages to do, we miss early wakeups as q.key is equal to key2 (because they are the same uaddr). We will then attempt to dereference the pi_mutex (which would exist had the futex_q been properly requeued to a pi futex) and trigger a NULL pointer dereference. Signed-off-by: Darren Hart <dvhart@linux.intel.com> Cc: Dave Jones <davej@redhat.com> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/ad82bfe7f7d130247fbe2b5b4275654807774227.1342809673.git.dvhart@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | | | | futex: Fix bug in WARN_ON for NULL q.pi_stateDarren Hart2012-07-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The WARN_ON in futex_wait_requeue_pi() for a NULL q.pi_state was testing the address (&q.pi_state) of the pointer instead of the value (q.pi_state) of the pointer. Correct it accordingly. Signed-off-by: Darren Hart <dvhart@linux.intel.com> Cc: Dave Jones <davej@redhat.com> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/1c85d97f6e5f79ec389a4ead3e367363c74bd09a.1342809673.git.dvhart@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | | | | futex: Test for pi_mutex on fault in futex_wait_requeue_pi()Darren Hart2012-07-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If fixup_pi_state_owner() faults, pi_mutex may be NULL. Test for pi_mutex != NULL before testing the owner against current and possibly unlocking it. Signed-off-by: Darren Hart <dvhart@linux.intel.com> Cc: Dave Jones <davej@redhat.com> Cc: Dan Carpenter <dan.carpenter@oracle.com> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/dc59890338fc413606f04e5c5b131530734dae3d.1342809673.git.dvhart@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* | | | | | Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds2012-08-03
|\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Ingo Molnar: "Various fixes" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86-64, kcmp: The kcmp system call can be common arch/x86/kernel/kdebugfs.c: Ensure a consistent return value in error case x86/mce: Add quirk for instruction recovery on Sandy Bridge processors x86/mce: Move MCACOD defines from mce-severity.c to <asm/mce.h> x86/ioapic: Fix NULL pointer dereference on CPU hotplug after disabling irqs x86, nops: Missing break resulting in incorrect selection on Intel x86: CONFIG_CC_STACKPROTECTOR=y is no longer experimental
| * | | | | | x86-64, kcmp: The kcmp system call can be commonH. Peter Anvin2012-08-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We already use the same system call handler for i386 and x86-64, there is absolutely no reason x32 can't use the same system call, too. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Cc: H.J. Lu <hjl.tools@gmail.com> Cc: Cyrill Gorcunov <gorcunov@openvz.org> Cc: <stable@vger.kernel.org> v3.5 Link: http://lkml.kernel.org/n/tip-vwzk3qbcr3yjyxjg2j38vgy9@git.kernel.org
| * | | | | | arch/x86/kernel/kdebugfs.c: Ensure a consistent return value in error caseJulia Lawall2012-07-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Typically, the return value desired for the failure of a function with an integer return value is a negative integer. In these cases, the return value is sometimes a negative integer and sometimes 0, due to a subsequent initialization of the return variable within the loop. A simplified version of the semantic match that finds this problem is: (http://coccinelle.lip6.fr/) //<smpl> @r exists@ identifier ret; position p; constant C; expression e1,e3,e4; statement S; @@ ret = -C ... when != ret = e3 when any if@p (...) S ... when any if (\(ret != 0\|ret < 0\|ret > 0\) || ...) { ... return ...; } ... when != ret = e3 when any *if@p (...) { ... when != ret = e4 return ret; } //</smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Link: http://lkml.kernel.org/r/1342284188-19176-7-git-send-email-Julia.Lawall@lip6.fr Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | | | x86/mce: Add quirk for instruction recovery on Sandy Bridge processorsTony Luck2012-07-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Sandy Bridge processors follow the SDM (Vol 3B, Table 15-20) and set both the RIPV and EIPV bits in the MCG_STATUS register to zero for machine checks during instruction fetch. This is more than a little counter-intuitive and means that Linux cannot recover from these errors. Rather than insert special case code at several places in mce.c and mce-severity.c, we pretend the EIPV bit was set for just this case early in processing the machine check. Acked-by: Borislav Petkov <bp@amd64.org> Signed-off-by: Tony Luck <tony.luck@intel.com> Cc: Chen Gong <gong.chen@linux.intel.com> Cc: Huang Ying <ying.huang@intel.com> Cc: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Link: http://lkml.kernel.org/r/180a06f3f357cf9f78259ae443a082b14a29535b.1343078495.git.tony.luck@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | | | x86/mce: Move MCACOD defines from mce-severity.c to <asm/mce.h>Tony Luck2012-07-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We will need some of these values in mce.c. Move them to the appropriate header file so they are available. Acked-by: Borislav Petkov <bp@amd64.org> Signed-off-by: Tony Luck <tony.luck@intel.com> Cc: Chen Gong <gong.chen@linux.intel.com> Cc: Huang Ying <ying.huang@intel.com> Cc: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Link: http://lkml.kernel.org/r/0ccfb1af5fe35e537b7cd8e4d448bf7d851dbfb9.1343078495.git.tony.luck@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | | | x86/ioapic: Fix NULL pointer dereference on CPU hotplug after disabling irqsTomoki Sekiyama2012-07-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In the current kernel, percpu variable `vector_irq' is not always cleared when a CPU is offlined. If the CPU that has the disabled irqs in vector_irq is hotplugged again, __setup_vector_irq() hits invalid irq vector and may crash. This bug can be reproduced as following; # echo 0 > /sys/devices/system/cpu/cpu7/online # modprobe -r some_driver_using_interrupts # vector_irq@cpu7 uncleared # echo 1 > /sys/devices/system/cpu/cpu7/online # kernel may crash To fix this problem, this patch clears vector_irq in __fixup_irqs() when the CPU is offlined. This also reverts commit f6175f5bfb4c, which partially fixes this bug by clearing vector in __clear_irq_vector(). But in environments with IOMMU IRQ remapper, it could fail because cfg->domain doesn't contain offlined CPUs. With this patch, the fix in __clear_irq_vector() can be reverted because every vector_irq is already cleared in __fixup_irqs() on offlined CPUs. Signed-off-by: Tomoki Sekiyama <tomoki.sekiyama.qu@hitachi.com> Acked-by: Suresh Siddha <suresh.b.siddha@intel.com> Cc: yrl.pp-manager.tt@hitachi.com Cc: Yinghai Lu <yinghai@kernel.org> Cc: Alexander Gordeev <agordeev@redhat.com> Link: http://lkml.kernel.org/r/20120726104732.2889.19144.stgit@kvmdev Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | | | Merge branch 'linus' into x86/urgentIngo Molnar2012-07-25
| |\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge in Linus's tree to avoid a conflict. Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | | | | x86, nops: Missing break resulting in incorrect selection on IntelAlan Cox2012-07-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Intel case falls through into the generic case which then changes the values. For cases like the P6 it doesn't do the right thing so this seems to be a screwup. Signed-off-by: Alan Cox <alan@linux.intel.com> Link: http://lkml.kernel.org/n/tip-lww2uirad4skzjlmrm0vru8o@git.kernel.org Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: <stable@vger.kernel.org>
| * | | | | | | x86: CONFIG_CC_STACKPROTECTOR=y is no longer experimentalJean Delvare2012-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This feature has been around for over 5 years now, and has no CONFIG_EXPERIMENTAL dependency anymore, so remove the '(EXPERIMENTAL)' tag from the help text as well. Signed-off-by: Jean Delvare <jdelvare@suse.de> Acked-by: Arjan van de Ven <arjan@linux.intel.com> Link: http://lkml.kernel.org/r/1341583705.4655.18.camel@amber.site Signed-off-by: Ingo Molnar <mingo@kernel.org>
* | | | | | | | Merge branch 'timers-urgent-for-linus' of ↵Linus Torvalds2012-08-03
|\ \ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer fixes from Ingo Molnar: "One regression fix, and a couple of cleanups that clean up the code flow in areas that had high-profile bugs recently." * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: time: Remove all direct references to timekeeper time: Clean up offs_real/wall_to_mono and offs_boot/total_sleep_time updates time: Clean up stray newlines time/jiffies: Rename ACTHZ to SHIFTED_HZ time/jiffies: Allow CLOCK_TICK_RATE to be undefined time: Fix casting issue in tk_set_xtime and tk_xtime_add
| * | | | | | | | time: Remove all direct references to timekeeperJohn Stultz2012-07-31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Ingo noted that the numerous timekeeper.value references made the timekeeping code ugly and caused many long lines that had to be broken up. He recommended replacing timekeeper.value references with tk->value. This patch provides a local tk value for all top level time functions and sets it to &timekeeper. Then all timekeeper access is done via a tk pointer. Signed-off-by: John Stultz <john.stultz@linaro.org> Cc: Prarit Bhargava <prarit@redhat.com> Link: http://lkml.kernel.org/r/1343414893-45779-6-git-send-email-john.stultz@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | | | | | time: Clean up offs_real/wall_to_mono and offs_boot/total_sleep_time updatesJohn Stultz2012-07-31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For performance reasons, we maintain ktime_t based duplicates of wall_to_monotonic (offs_real) and total_sleep_time (offs_boot). Since large problems could occur (such as the resume regression on 3.5-rc7, or the leapsecond hrtimer issue) if these value pairs were to be inconsistently updated, this patch this cleans up how we modify these value pairs to ensure we are always consistent. As a side-effect this is also more efficient as we only caulculate the duplicate values when they are changed, rather then every update_wall_time call. This also provides WARN_ONs to detect if future changes break the invariants. Signed-off-by: John Stultz <john.stultz@linaro.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Richard Cochran <richardcochran@gmail.com> Cc: Prarit Bhargava <prarit@redhat.com> Link: http://lkml.kernel.org/r/1343414893-45779-5-git-send-email-john.stultz@linaro.org [ Cleaned up minor style issues. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | | | | | time: Clean up stray newlinesJohn Stultz2012-07-31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Ingo noted inconsistent newline usage between functions. This patch cleans those up. Signed-off-by: John Stultz <john.stultz@linaro.org> Cc: Prarit Bhargava <prarit@redhat.com> Link: http://lkml.kernel.org/r/1343414893-45779-4-git-send-email-john.stultz@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | | | | | time/jiffies: Rename ACTHZ to SHIFTED_HZJohn Stultz2012-07-31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Ingo noted that ACTHZ is a confusing name, and requested it be renamed, so this patch renames ACTHZ to SHIFTED_HZ to better describe it. Signed-off-by: John Stultz <john.stultz@linaro.org> Cc: Prarit Bhargava <prarit@redhat.com> Link: http://lkml.kernel.org/r/1343414893-45779-3-git-send-email-john.stultz@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | | | | | time/jiffies: Allow CLOCK_TICK_RATE to be undefinedCatalin Marinas2012-07-31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | CLOCK_TICK_RATE is a legacy constant that defines the timer device's granularity. On hardware with particularly coarse granularity, this constant is used to reduce accumulated time error when using jiffies as a clocksource, by calculating the hardware's actual tick length rather then just assuming it is 1sec/HZ. However, for the most part this is unnecessary, as most modern systems don't use jiffies for their clocksource, and their tick device is sufficiently fine grained to avoid major error. Thus, this patch allows an architecture to not define CLOCK_TICK_RATE, in which case ACTHZ defaults to (HZ << 8). Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Cc: Richard Cochran <richardcochran@gmail.com> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> [ Commit log & intention tweaks ] Signed-off-by: John Stultz <john.stultz@linaro.org> Link: http://lkml.kernel.org/r/1343414893-45779-2-git-send-email-john.stultz@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | | | | | Merge branch 'linus' into timers/urgentIngo Molnar2012-07-31
| |\ \ \ \ \ \ \ \ | | | |/ / / / / / | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge in Linus's branch which already has timers/core merged. Signed-off-by: Ingo Molnar <mingo@kernel.org>