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2012-03-09perf report: Add support for taken branch samplingRoberto Agostino Vitillo
This patch adds support for taken branch sampling, i.e, the PERF_SAMPLE_BRANCH_STACK feature to perf report. In other words, to display histograms based on taken branches rather than executed instructions addresses. The new option is called -b and it takes no argument. To generate meaningful output, the perf.data must have been obtained using perf record -b xxx ... where xxx is a branch filter option. The output shows symbols, modules, sorted by 'who branches where' the most often. The percentages reported in the first column refer to the total number of branches captured and not the usual number of samples. Here is a quick example. Here branchy is simple test program which looks as follows: void f2(void) {} void f3(void) {} void f1(unsigned long n) { if (n & 1UL) f2(); else f3(); } int main(void) { unsigned long i; for (i=0; i < N; i++) f1(i); return 0; } Here is the output captured on Nehalem, if we are only interested in user level function calls. $ perf record -b any_call,u -e cycles:u branchy $ perf report -b --sort=symbol 52.34% [.] main [.] f1 24.04% [.] f1 [.] f3 23.60% [.] f1 [.] f2 0.01% [k] _IO_new_file_xsputn [k] _IO_file_overflow 0.01% [k] _IO_vfprintf_internal [k] _IO_new_file_xsputn 0.01% [k] _IO_vfprintf_internal [k] strchrnul 0.01% [k] __printf [k] _IO_vfprintf_internal 0.01% [k] main [k] __printf About half (52%) of the call branches captured are from main() -> f1(). The second half (24%+23%) is split in two equal shares between f1() -> f2(), f1() ->f3(). The output is as expected given the code. It should be noted, that using -b in perf record does not eliminate information in the perf.data file. Consequently, a typical profile can also be obtained by perf report by simply not using its -b option. It is possible to sort on branch related columns: - dso_from, symbol_from - dso_to, symbol_to - mispredict Signed-off-by: Roberto Agostino Vitillo <ravitillo@lbl.gov> Signed-off-by: Stephane Eranian <eranian@google.com> Cc: peterz@infradead.org Cc: acme@redhat.com Cc: robert.richter@amd.com Cc: ming.m.lin@intel.com Cc: andi@firstfloor.org Cc: asharma@fb.com Cc: vweaver1@eecs.utk.edu Cc: khandual@linux.vnet.ibm.com Cc: dsahern@gmail.com Link: http://lkml.kernel.org/r/1328826068-11713-14-git-send-email-eranian@google.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-03-09perf record: Add support for sampling taken branchRoberto Agostino Vitillo
This patch adds a new option to enable taken branch stack sampling, i.e., leverage the PERF_SAMPLE_BRANCH_STACK feature of perf_events. There is a new option to active this mode: -b. It is possible to pass a set of filters to select the type of branches to sample. The following filters are available: - any : any type of branches - any_call : any function call or system call - any_ret : any function return or system call return - any_ind : any indirect branch - u: only when the branch target is at the user level - k: only when the branch target is in the kernel - hv: only when the branch target is in the hypervisor Filters can be combined by passing a comma separated list to the option: $ perf record -b any_call,u -e cycles:u branchy Signed-off-by: Roberto Agostino Vitillo <ravitillo@lbl.gov> Signed-off-by: Stephane Eranian <eranian@google.com> Cc: peterz@infradead.org Cc: acme@redhat.com Cc: robert.richter@amd.com Cc: ming.m.lin@intel.com Cc: andi@firstfloor.org Cc: asharma@fb.com Cc: vweaver1@eecs.utk.edu Cc: khandual@linux.vnet.ibm.com Cc: dsahern@gmail.com Link: http://lkml.kernel.org/r/1328826068-11713-13-git-send-email-eranian@google.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-03-09perf tools: Add code to support PERF_SAMPLE_BRANCH_STACKRoberto Agostino Vitillo
This patch adds: - ability to parse samples with PERF_SAMPLE_BRANCH_STACK - sort on branches (dso_from, symbol_from, dso_to, symbol_to, mispredict) - build histograms on branches Signed-off-by: Roberto Agostino Vitillo <ravitillo@lbl.gov> Signed-off-by: Stephane Eranian <eranian@google.com> Cc: peterz@infradead.org Cc: acme@redhat.com Cc: robert.richter@amd.com Cc: ming.m.lin@intel.com Cc: andi@firstfloor.org Cc: asharma@fb.com Cc: vweaver1@eecs.utk.edu Cc: khandual@linux.vnet.ibm.com Cc: dsahern@gmail.com Link: http://lkml.kernel.org/r/1328826068-11713-12-git-send-email-eranian@google.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-03-09sh-sci / PM: Avoid deadlocking runtime PMRafael J. Wysocki
The runtime PM of sh-sci devices is enabled when sci_probe() returns, so the pm_runtime_put_sync() executed by driver_probe_device() attempts to suspend the device. Then, in some situations, a diagnostic message is printed to the console by one of the runtime suspend routines handling the sh-sci device, which causes synchronous runtime resume to be started from the device's own runtime suspend callback. This causes rpm_resume() to be run eventually, which sees the RPM_SUSPENDING status set by rpm_suspend() and waits for it to change. However, the device's runtime PM status cannot change at that point, because the routine that has set it waits for the rpm_suspend() to return. A deadlock occurs as a result. To avoid that make sci_init_single() increment the device's runtime PM usage counter, so that it cannot be suspended by driver_probe_device(). That counter has to be decremented eventually, so make sci_startup() do that before starting to actually use the device and make sci_shutdown() increment it again before returning to balance the incrementation carried out by sci_startup(). Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Tested-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2012-03-08vfs: use 'unsigned long' accesses for dcache name comparison and hashingLinus Torvalds
Ok, this is hacky, and only works on little-endian machines with goo unaligned handling. And even then only with CONFIG_DEBUG_PAGEALLOC disabled, since it can access up to 7 bytes after the pathname. But it runs like a bat out of hell. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-08Merge tag 'fixes-urgent' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull last minute fixes from Olof Johansson: "One samsung build fix due to a mis-applied patch, and a small set of OMAP fixes. This should be the last from arm-soc for 3.3, hopefully." * tag 'fixes-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: ARM: S3C2440: Fixed build error for s3c244x ARM: OMAP2+: Fix module build errors with CONFIG_OMAP4_ERRATA_I688 ARM: OMAP: id: Add missing break statement in omap3xxx_check_revision ARM: OMAP2+: Remove apply_uV constraints for fixed regulator ARM: OMAP: irqs: Fix NR_IRQS value to handle PRCM interrupts
2012-03-08Merge tag 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator Pull regulator fix from Mark Brown: "Another small, clear fix in a specific driver." * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator: regulator: tps65910: Configure correct value for VDDCTRL vout reg
2012-03-08Merge tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux-2.6Linus Torvalds
Pull minor devicetree bug fixes and documentation updates from Grant Likely: "Fixes up a duplicate #include, adds an empty implementation of of_find_compatible_node() and make git ignore .dtb files. And fix up bus name on OF described PHYs. Nothing exciting here." * tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux-2.6: doc: dt: Fix broken reference in gpio-leds documentation of/mdio: fix fixed link bus name of/fdt.c: asm/setup.h included twice of: add picochip vendor prefix dt: add empty of_find_compatible_node function ARM: devicetree: Add .dtb files to arch/arm/boot/.gitignore
2012-03-08Merge tag 'spi-for-linus' of git://git.secretlab.ca/git/linux-2.6Linus Torvalds
Pull SPI section mismatch bug fix for v3.3-rc3 from Grant Likely: "Minor fix for pl022_dma_probe() function which was put in the wrong section." * tag 'spi-for-linus' of git://git.secretlab.ca/git/linux-2.6: Fix section mismatch in spi-pl022.c
2012-03-08Merge tag 'hwmon-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging Pull four hwmon patches from Guenter Roeck * tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: hwmon: (jc42) Add support for AT30TS00, TS3000GB2, TSE2002GB2, and MCP9804 hwmon: (zl6100) Maintain delay parameter in driver instance data hwmon: (pmbus_core) Fix maximum number of POUT alarm attributes hwmon: (jc42) Add support for ST Microelectronics STTS2002 and STTS3000
2012-03-08Merge tag 'dm-3.3-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-dm Pull device-mapper fixes for 3.3 from Alasdair Kergon Eight small device-mapper bug fixes. * tag 'dm-3.3-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-dm: dm raid: fix flush support dm raid: set MD_CHANGE_DEVS when rebuilding dm thin metadata: decrement counter after removing mapped block dm thin metadata: unlock superblock in init_pmd error path dm thin metadata: remove incorrect close_device on creation error paths dm flakey: fix crash on read when corrupt_bio_byte not set dm io: fix discard support dm ioctl: do not leak argv if target message only contains whitespace
2012-03-08net/hyperv: Use the built-in macro KBUILD_MODNAME for this driverHaiyang Zhang
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Cc: Olaf Hering <olaf@aepfle.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-08Merge branch 'fixes' of ↵Olof Johansson
git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: ARM: OMAP2+: Fix module build errors with CONFIG_OMAP4_ERRATA_I688 ARM: OMAP: id: Add missing break statement in omap3xxx_check_revision ARM: OMAP2+: Remove apply_uV constraints for fixed regulator ARM: OMAP: irqs: Fix NR_IRQS value to handle PRCM interrupts
2012-03-08ARM: S3C2440: Fixed build error for s3c244xKukjin Kim
Fixed following: arch/arm/mach-s3c2440/s3c244x.c: In function 's3c244x_restart': arch/arm/mach-s3c2440/s3c244x.c:209: error: expected declaration or statement at end of input make[1]: *** [arch/arm/mach-s3c24xx/s3c244x.o] Error 1 make: *** [arch/arm/mach-s3c24xx] Error 2 Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Olof Johansson <olof@lixom.net>
2012-03-08ALSA: hdspm - Provide ioctl_compatAdrian Knoth
snd_hdspm uses its own ioctls to acquire config- and status information. Expose the corresponding ioctl handler via ioctl_compat, so that 32bit applications can use it on 64bit kernels. Signed-off-by: Adrian Knoth <adi@drcomp.erfurt.thur.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-03-08[media] smsdvb: fix get_frontendGianluca Gennari
In the get_frontend function, an internal copy of the dtv_frontend_properties struct (which is never initialized) is copied over the frontend property cache data structure, resetting everything to 0. In particular, the delivery system is reset to 0 (which is an invalid value) so the driver stops working as soon as a DVBv3 application calls the get_frontend function, giving this error: dvb_frontend_ioctl_legacy: doesn't know how to handle a DVBv3 call to delivery system 0 This patch eliminates the unused internal copy of the dtv_frontend_properties struct, and gives a proper implementation of the get_frontend function. The original author of the patch is Panagiotis Malakoudis, who also tested this new version on Ubuntu 11.10 with the latest media_build tree installed. The original patch has been used on MIPS set-top-boxes for over one year, but it was never posted on the linux-media list. I ported the code to the current media_build tree (converting it to use the dtv_frontend_properties struct) and added basic support for ISDB-T (untested). Signed-off-by: Panagiotis Malakoudis <malakudi@gmail.com> Signed-off-by: Gianluca Gennari <gennarone@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-03-08x86/amd: iommu_set_device_table() must not be __initJan Beulich
This function is called from enable_iommus(), which in turn is used from amd_iommu_resume(). Cc: stable@vger.kernel.org Signed-off-by: Jan Beulich <jbeulich@suse.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-03-08drm/radeon/kms: fix hdmi duallink checksAlex Deucher
All pre-SI chips are limited to 165 Mhz for single link. Code in question will be re-enabled when SI support is added. Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=44755 https://bugzilla.kernel.org/show_bug.cgi?id=42887 Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: stable@vger.kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-03-08drm/radeon/kms: set SX_MISC in the r6xx blit code (v2)Marek Olšák
Mesa may set it to 1, causing all primitives to be killed. v2: also update the r7xx code Signed-off-by: Marek Olšák <maraeo@gmail.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Cc: stable@kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-03-08net/usbnet: avoid recursive locking in usbnet_stop()Sebastian Siewior
|kernel BUG at kernel/rtmutex.c:724! |[<c029599c>] (rt_spin_lock_slowlock+0x108/0x2bc) from [<c01c2330>] (defer_bh+0x1c/0xb4) |[<c01c2330>] (defer_bh+0x1c/0xb4) from [<c01c3afc>] (rx_complete+0x14c/0x194) |[<c01c3afc>] (rx_complete+0x14c/0x194) from [<c01cac88>] (usb_hcd_giveback_urb+0xa0/0xf0) |[<c01cac88>] (usb_hcd_giveback_urb+0xa0/0xf0) from [<c01e1ff4>] (musb_giveback+0x34/0x40) |[<c01e1ff4>] (musb_giveback+0x34/0x40) from [<c01e2b1c>] (musb_advance_schedule+0xb4/0x1c0) |[<c01e2b1c>] (musb_advance_schedule+0xb4/0x1c0) from [<c01e2ca8>] (musb_cleanup_urb.isra.9+0x80/0x8c) |[<c01e2ca8>] (musb_cleanup_urb.isra.9+0x80/0x8c) from [<c01e2ed0>] (musb_urb_dequeue+0xec/0x108) |[<c01e2ed0>] (musb_urb_dequeue+0xec/0x108) from [<c01cbb90>] (unlink1+0xbc/0xcc) |[<c01cbb90>] (unlink1+0xbc/0xcc) from [<c01cc2ec>] (usb_hcd_unlink_urb+0x54/0xa8) |[<c01cc2ec>] (usb_hcd_unlink_urb+0x54/0xa8) from [<c01c2a84>] (unlink_urbs.isra.17+0x2c/0x58) |[<c01c2a84>] (unlink_urbs.isra.17+0x2c/0x58) from [<c01c2b44>] (usbnet_terminate_urbs+0x94/0x10c) |[<c01c2b44>] (usbnet_terminate_urbs+0x94/0x10c) from [<c01c2d68>] (usbnet_stop+0x100/0x15c) |[<c01c2d68>] (usbnet_stop+0x100/0x15c) from [<c020f718>] (__dev_close_many+0x94/0xc8) defer_bh() takes the lock which is hold during unlink_urbs(). The safe walk suggest that the skb will be removed from the list and this is done by defer_bh() so it seems to be okay to drop the lock here. Cc: stable@kernel.org Reported-by: Aníbal Almeida Pinto <anibal.pinto@efacec.com> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Acked-by: Oliver Neukum <oliver@neukum.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-08route: Remove redirect_genidSteffen Klassert
As we invalidate the inetpeer tree along with the routing cache now, we don't need a genid to reset the redirect handling when the routing cache is flushed. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-08inetpeer: Invalidate the inetpeer tree along with the routing cacheSteffen Klassert
We initialize the routing metrics with the values cached on the inetpeer in rt_init_metrics(). So if we have the metrics cached on the inetpeer, we ignore the user configured fib_metrics. To fix this issue, we replace the old tree with a fresh initialized inet_peer_base. The old tree is removed later with a delayed work queue. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-08mlx4_core: fix bug in modify_cq wrapper for resize flow.Jack Morgenstein
The actual FW command is called in procedure "handle_resize". Code incorrectly invoked the FW command again (in good flow), in the modify_cq wrapper function. Fix by skipping second FW invocation unconditionally for resize. Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-08atl1c: set ATL1C_WORK_EVENT_RESET bit correctlyDan Carpenter
ATL1C_WORK_EVENT_RESET is zero so the original code here is a nop. The intent was to set the zero bit. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-08bridge: fix state reporting when port is disabledPaulius Zaleckas
Now we have: eth0: link *down* br0: port 1(eth0) entered *forwarding* state br_log_state(p) should be called *after* p->state is set to BR_STATE_DISABLED. Reported-by: Zilvinas Valinskas <zilvinas@wilibox.com> Signed-off-by: Paulius Zaleckas <paulius.zaleckas@gmail.com> Acked-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-08bridge: br_log_state() s/entering/entered/Paulius Zaleckas
When br_log_state() is reporting state it should say "entered" istead of "entering" since state at this point is already changed. Signed-off-by: Paulius Zaleckas <paulius.zaleckas@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-08ehea: restore multicast and rx_errors fieldsEric Dumazet
Commit 239c562c94d (ehea: Add 64bit statistics) added a regression, since we no longer report multicast & rx_errors fields, taken from port->stats structure. These fields are updated in ehea_update_stats() every second. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Anton Blanchard <anton@samba.org> Cc: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com> Acked-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com> Tested-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-07Merge branch 'fixes' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/jesse/openvswitch
2012-03-07PCI: ignore pre-1.1 ASPM quirking when ASPM is disabledMatthew Garrett
Right now we won't touch ASPM state if ASPM is disabled, except in the case where we find a device that appears to be too old to reliably support ASPM. Right now we'll clear it in that case, which is almost certainly the wrong thing to do. The easiest way around this is just to disable the blacklisting when ASPM is disabled. Signed-off-by: Matthew Garrett <mjg@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-03-07openvswitch: Fix checksum update for actions on UDP packets.Jesse Gross
When modifying IP addresses or ports on a UDP packet we don't correctly follow the rules for unchecksummed packets. This meant that packets without a checksum can be given a incorrect new checksum and packets with a checksum can become marked as being unchecksummed. This fixes it to handle those requirements. Signed-off-by: Jesse Gross <jesse@nicira.com>
2012-03-07Merge branch 'for-davem' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless
2012-03-07regulator: tps65910: Configure correct value for VDDCTRL vout regLaxman Dewangan
As per datasheet, the voltage output is defined as from SEL[6:0] = 3 to 64 (dec) Vout= (SEL[6:0] × 12.5 mV + 562.5 mV) The list_voltage returns the vout as 600mV + selector * 12.5mV and so equivalent VSEL is selector + 3. Adding 3 on selector when configuring VSEL register for VDDCTRL output. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-03-07dm raid: fix flush supportJonathan E Brassow
Fix dm-raid flush support. Both md and dm have support for flush, but the dm-raid target forgot to set the flag to indicate that flushes should be passed on. (Important for data integrity e.g. with writeback cache enabled.) Signed-off-by: Jonathan Brassow <jbrassow@redhat.com> Acked-by: Mike Snitzer <snitzer@redhat.com> Cc: stable@kernel.org Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-03-07dm raid: set MD_CHANGE_DEVS when rebuildingJonathan E Brassow
The 'rebuild' parameter is used to rebuild individual devices in an array (e.g. resynchronize a RAID1 device or recalculate a parity device in higher RAID). The MD_CHANGE_DEVS flag must be set when this parameter is given in order to write out the superblocks and make the change take immediate effect. The code that handles new devices in super_load already sets MD_CHANGE_DEVS and 'FirstUse'. (The 'FirstUse' flag was being set as a special case for rebuilds in super_init_validation.) Add a condition for rebuilds in super_load to take care of both flags without the special case in 'super_init_validation'. Signed-off-by: Jonathan Brassow <jbrassow@redhat.com> Cc: stable@kernel.org Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-03-07dm thin metadata: decrement counter after removing mapped blockJoe Thornber
Correct the number of mapped sectors shown on a thin device's status line by decrementing td->mapped_blocks in __remove() each time a block is removed. Signed-off-by: Joe Thornber <ejt@redhat.com> Acked-by: Mike Snitzer <snitzer@redhat.com> Cc: stable@kernel.org Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-03-07dm thin metadata: unlock superblock in init_pmd error pathJoe Thornber
If dm_sm_disk_create() fails the superblock must be unlocked. Signed-off-by: Joe Thornber <ejt@redhat.com> Acked-by: Mike Snitzer <snitzer@redhat.com> Cc: stable@kernel.org Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-03-07dm thin metadata: remove incorrect close_device on creation error pathsMike Snitzer
The __open_device() error paths in __create_thin() and __create_snap() incorrectly call __close_device() even if td was not initialized by __open_device(). Remove this. Also document __open_device() return values, remove a redundant td->changed = 1 in __create_thin(), and insert an additional safeguard against creating an already-existing device. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Cc: stable@kernel.org Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-03-07dm flakey: fix crash on read when corrupt_bio_byte not setMike Snitzer
The following BUG is hit on the first read that is submitted to a dm flakey test device while the device is "down" if the corrupt_bio_byte feature wasn't requested when the device's table was loaded. Example DM table that will hit this BUG: 0 2097152 flakey 8:0 2048 0 30 This bug was introduced by commit a3998799fb4df0b0af8271a7d50c4269032397aa (dm flakey: add corrupt_bio_byte feature) in v3.1-rc1. BUG: unable to handle kernel paging request at ffff8801cfce3fff IP: [<ffffffffa008c233>] corrupt_bio_data+0x6e/0xae [dm_flakey] PGD 1606063 PUD 0 Oops: 0002 [#1] SMP ... Call Trace: <IRQ> [<ffffffffa008c2b5>] flakey_end_io+0x42/0x48 [dm_flakey] [<ffffffffa00dca98>] clone_endio+0x54/0xb6 [dm_mod] [<ffffffff81130587>] bio_endio+0x2d/0x2f [<ffffffff811c819a>] req_bio_endio+0x96/0x9f [<ffffffff811c94b9>] blk_update_request+0x1dc/0x3a9 [<ffffffff812f5ee2>] ? rcu_read_unlock+0x21/0x23 [<ffffffff811c96a6>] blk_update_bidi_request+0x20/0x6e [<ffffffff811c9713>] blk_end_bidi_request+0x1f/0x5d [<ffffffff811c978d>] blk_end_request+0x10/0x12 [<ffffffff8128f450>] scsi_io_completion+0x1e5/0x4b1 [<ffffffff812882a9>] scsi_finish_command+0xec/0xf5 [<ffffffff8128f830>] scsi_softirq_done+0xff/0x108 [<ffffffff811ce284>] blk_done_softirq+0x84/0x98 [<ffffffff81048d19>] __do_softirq+0xe3/0x1d5 [<ffffffff8138f83f>] ? _raw_spin_lock+0x62/0x69 [<ffffffff810997cf>] ? handle_irq_event+0x4c/0x61 [<ffffffff8139833c>] call_softirq+0x1c/0x30 [<ffffffff81003b37>] do_softirq+0x4b/0xa3 [<ffffffff81048a39>] irq_exit+0x53/0xca [<ffffffff81398acd>] do_IRQ+0x9d/0xb4 [<ffffffff81390333>] common_interrupt+0x73/0x73 ... Signed-off-by: Mike Snitzer <snitzer@redhat.com> Cc: stable@vger.kernel.org # 3.1+ Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-03-07dm io: fix discard supportMilan Broz
This patch fixes a crash by recognising discards in dm_io. Currently dm_mirror can send REQ_DISCARD bios if running over a discard-enabled device and without support in dm_io the system crashes badly. BUG: unable to handle kernel paging request at 00800000 IP: __bio_add_page.part.17+0xf5/0x1e0 ... bio_add_page+0x56/0x70 dispatch_io+0x1cf/0x240 [dm_mod] ? km_get_page+0x50/0x50 [dm_mod] ? vm_next_page+0x20/0x20 [dm_mod] ? mirror_flush+0x130/0x130 [dm_mirror] dm_io+0xdc/0x2b0 [dm_mod] ... Introduced in 2.6.38-rc1 by commit 5fc2ffeabb9ee0fc0e71ff16b49f34f0ed3d05b4 (dm raid1: support discard). Signed-off-by: Milan Broz <mbroz@redhat.com> Cc: stable@kernel.org Acked-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-03-07dm ioctl: do not leak argv if target message only contains whitespaceJesper Juhl
If 'argc' is zero we jump to the 'out:' label, but this leaks the (unused) memory that 'dm_split_args()' allocated for 'argv' if the string being split consisted entirely of whitespace. Jump to the 'out_argv:' label instead to free up that memory. Signed-off-by: Jesper Juhl <jj@chaosbits.net> Cc: stable@kernel.org Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-03-07drm/i915: support 32 bit BGR formats in sprite planesJesse Barnes
intel_framebuffer_init does some basic sanity checking of the pixel format, but is used by the plane code in addition to the primary crtc. So it needs to contain any formats used in either place. Add the XBGR8888 format to the checklist so the plane code can use it. Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Keith Packard <keithp@keithp.com>
2012-03-07drm/i915: fix color order for BGR formats on SNBJesse Barnes
Had the wrong bits and field definitions. Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Keith Packard <keithp@keithp.com>
2012-03-07hwmon: (jc42) Add support for AT30TS00, TS3000GB2, TSE2002GB2, and MCP9804Guenter Roeck
Also update IDT datasheet locations. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Cc: stable@vger.kernel.org # 3.0+ Acked-by: Jean Delvare <khali@linux-fr.org>
2012-03-07hwmon: (zl6100) Maintain delay parameter in driver instance dataGuenter Roeck
A global delay parameter has the side effect of being overwritten with 0 if a single ZL2004 or ZL6105 is instantiated. If other chips supported by the same driver are in the system, this will result in access errors for those chips. To solve the problem, keep a per-instance copy of the delay parameter, and do not change the original parameter. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Cc: stable@vger.kernel.org # 3.1+ Acked-by: Jean Delvare <khali@linux-fr.org>
2012-03-07hwmon: (pmbus_core) Fix maximum number of POUT alarm attributesGuenter Roeck
There are up to three POUT alarm attributes, not two, since cap_alarm was added. Reported-by: Michele Petracca <mi.petracca@gmail.com> Cc: stable@vger.kernel.org # 3.0+ [3.0 will need backport] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2012-03-07hwmon: (jc42) Add support for ST Microelectronics STTS2002 and STTS3000Jean Delvare
These are fully compatible with Jedec JC 42.4 as far as I can see. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Guenter Roeck <guenter.roeck@ericsson.com> Cc: stable@vger.kernel.org # 3.0+ Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
2012-03-07Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-armLinus Torvalds
Pull ARM updates from Russell King. * 'fixes' of git://git.linaro.org/people/rmk/linux-arm: ARM: 7358/1: perf: add PMU hotplug notifier ARM: 7357/1: perf: fix overflow handling for xscale2 PMUs ARM: 7356/1: perf: check that we have an event in the PMU IRQ handlers ARM: 7355/1: perf: clear overflow flag when disabling counter on ARMv7 PMU ARM: 7354/1: perf: limit sample_period to half max_period in non-sampling mode ARM: ecard: ensure fake vma vm_flags is setup ARM: 7346/1: errata: fix PL310 erratum #753970 workaround selection ARM: 7345/1: errata: update workaround for A9 erratum #743622 ARM: 7348/1: arm/spear600: fix one-shot timer ARM: 7339/1: amba/serial.h: Include types.h for resolving dependency of type bool
2012-03-07Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input Pull input updates from Dmitry Torokhov: "Just a few driver fixups, nothing exciting." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: wacom - fix 3rd-gen Bamboo MT when 4+ fingers are in use Input: twl4030-vibra - use proper guard for PM methods Input: evdev - fix variable initialisation Input: wacom - add missing LEDS_CLASS to Kconfig Input: ALPS - fix touchpad detection when buttons are pressed
2012-03-07C6X: fix KSTK_EIP and KSTK_ESP macrosMark Salter
There was a latent typo in the C6X KSTK_EIP and KSTK_ESP macros which caused a problem with a new patch which used them. The broken definitions were of the form: #define KSTK_FOO(tsk) (task_pt_regs(task)->foo) Note the use of task vs tsk. This actually worked before because the only place in the kernel which used these macros passed in a local pointer named task. Signed-off-by: Mark Salter <msalter@redhat.com>
2012-03-07Revert "CPU hotplug, cpusets, suspend: Don't touch cpusets during ↵Linus Torvalds
suspend/resume" This reverts commit 8f2f748b0656257153bcf0941df8d6060acc5ca6. It causes some odd regression that we have not figured out, and it's too late in the -rc series to try to figure it out now. As reported by Konstantin Khlebnikov, it causes consistent hangs on his laptop (Thinkpad x220: 2x cores + HT). They can be avoided by adding calls to "rebuild_sched_domains();" in cpuset_cpu_[in]active() for the CPU_{ONLINE/DOWN_FAILED/DOWN_PREPARE}_FROZEN cases, but it's not at all clear why, and it makes no sense. Konstantin's config doesn't even have CONFIG_CPUSETS enabled, just to make things even more interesting. So it's not the cpusets, it's just the scheduling domains. So until this is understood, revert. Bisected-reported-and-tested-by: Konstantin Khlebnikov <khlebnikov@openvz.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Ingo Molnar <mingo@elte.hu> Acked-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
generated by cgit (git 2.34.1) at 2025-09-15 21:17:53 +0000