summaryrefslogtreecommitdiff
AgeCommit message (Collapse)Author
2011-12-05ipv4: Fix peer validation on cached lookup.David S. Miller
If ipv4_valdiate_peer() fails during a cached entry lookup, we'll NULL derer since the loop iterator assumes rth is not NULL. Letting this be handled as a failure is just bogus, so just make it not fail. If we have trouble getting a non-NULL neighbour for the redirected gateway, just restore the original gateway and continue. The very next use of this cached route will try again. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-12-05toshiba_acpi: Fix machines that don't support HCI_SYSTEM_EVENTSeth Forshee
The Satellite C670-10V generates notifications for hotkeys but does not support HCI_SYSTEM_EVENT. As a result when a hotkey is pressed it gets stuck in an infinite loop in toshiba_acpi_notify. To fix this, detect whether or not HCI_SYSTEM_EVENT is supported up-front and don't try to read system events if it isn't supported. In addition, limit the number of retries when reading HCI_SYSTEM_EVENT fails so that this loop cannot run unbounded. Signed-off-by: Seth Forshee <seth.forshee@canonical.com> Signed-off-by: Matthew Garrett <mjg@redhat.com>
2011-12-05ARM: OMAP1: recalculate loops per jiffy after dpll1 reprogramJanusz Krzysztofik
Otherwise timing is inaccurate, resulting in devices which depend on it, like omap-keypad, broken. Tested on Amstrad Delta. Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl> [tony@atomide.com: removed comment referencing a development branch] Signed-off-by: Tony Lindgren <tony@atomide.com>
2011-12-05intr_remapping: Fix section mismatch in ir_dev_scope_init()Sergey Senozhatsky
Fix: Section mismatch in reference from the function ir_dev_scope_init() to the function .init.text:dmar_dev_scope_init() The function ir_dev_scope_init() references the function __init dmar_dev_scope_init(). Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Cc: Suresh Siddha <suresh.b.siddha@intel.com> Cc: Youquan Song <youquan.song@intel.com> Cc: Ohad Ben-Cohen <ohad@wizery.com> Link: http://lkml.kernel.org/r/20111026161507.GB10103@swordfish Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-05intel-iommu: Fix section mismatch in dmar_parse_rmrr_atsr_dev()Sergey Senozhatsky
dmar_parse_rmrr_atsr_dev() calls rmrr_parse_dev() and atsr_parse_dev() which are both marked as __init. Section mismatch in reference from the function dmar_parse_rmrr_atsr_dev() to the function .init.text:dmar_parse_dev_scope() The function dmar_parse_rmrr_atsr_dev() references the function __init dmar_parse_dev_scope(). Section mismatch in reference from the function dmar_parse_rmrr_atsr_dev() to the function .init.text:dmar_parse_dev_scope() The function dmar_parse_rmrr_atsr_dev() references the function __init dmar_parse_dev_scope(). Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: iommu@lists.linux-foundation.org Cc: Joerg Roedel <joerg.roedel@amd.com> Cc: Ohad Ben-Cohen <ohad@wizery.com> Link: http://lkml.kernel.org/r/20111026154539.GA10103@swordfish Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-05x86, amd: Fix up numa_node information for AMD CPU family 15h model 0-0fh ↵Andreas Herrmann
northbridge functions I've received complaints that the numa_node attribute for family 15h model 00-0fh (e.g. Interlagos) northbridge functions shows -1 instead of the proper node ID. Correct this with attached quirks (similar to quirks for other AMD CPU families used in multi-socket systems). Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com> Cc: Frank Arnold <frank.arnold@amd.com> Cc: Borislav Petkov <borislav.petkov@amd.com> Link: http://lkml.kernel.org/r/20111202072143.GA31916@alberich.amd.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-05x86, AMD: Correct align_va_addr documentationBorislav Petkov
Commit dfb09f9b7ab0 ("x86, amd: Avoid cache aliasing penalties on AMD family 15h") introduced a kernel command line parameter called 'align_va_addr' which still refers to arguments used in an earlier version of the patch and which got changed without updating the documentation. Correct that omission. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com> Cc: Frank Arnold <frank.arnold@amd.com> Link: http://lkml.kernel.org/r/1321873819-29541-1-git-send-email-bp@amd64.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-05perf stat: Failure with "Operation not supported"Anton Blanchard
perf stat is failing on PowerPC: Error: open_counter returned with 95 (Operation not supported). /bin/dmesg may provide additional information. Fatal: Not all events could be opened. commit 370faf1dd046 (perf stat: Fail softly on unsupported events) added a check for failure returning ENOENT, but the POWER backend returns EOPNOTSUPP. It looks like alpha, blackfin and mips do the same. With the patch applied, things work as expected: Performance counter stats for '/bin/true': 0.362176 task-clock # 0.623 CPUs utilized 0 context-switches # 0.000 M/sec 0 CPU-migrations # 0.000 M/sec 28 page-faults # 0.077 M/sec 1,677,020 cycles # 4.630 GHz <not supported> stalled-cycles-frontend <not supported> stalled-cycles-backend 431,220 instructions # 0.26 insns per cycle 101,889 branches # 281.325 M/sec 4,145 branch-misses # 4.07% of all branches 0.000581361 seconds time elapsed Cc: <stable@kernel.org> # 3.0+ Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20111202093833.5fef7226@kryten Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-05x86/rtc, mrst: Don't register a platform RTC device for for Intel MID platformsMathias Nyman
Intel MID x86 platforms have a memory mapped virtual RTC instead. No MID platform have the default ports (and accessing them may do weird stuff). Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Cc: feng.tang@intel.com Cc: Feng Tang <feng.tang@intel.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-05x86/mrst: Battery fixesMajor Lee
When DCDC input line over current detecting, PMIC will change charging current automatically. Logging event is enough. Signed-off-by: Major Lee <major_lee@wistron.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Cc: Mathias Nyman <mathias.nyman@linux.intel.com> Cc: Feng Tang <feng.tang@intel.com> Cc: "H. Peter Anvin" <hpa@zytor.com> [fix build] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-05x86/paravirt: PTE updates in k(un)map_atomic need to be synchronous, ↵Konrad Rzeszutek Wilk
regardless of lazy_mmu mode Fix an outstanding issue that has been reported since 2.6.37. Under a heavy loaded machine processing "fork()" calls could crash with: BUG: unable to handle kernel paging request at f573fc8c IP: [<c01abc54>] swap_count_continued+0x104/0x180 *pdpt = 000000002a3b9027 *pde = 0000000001bed067 *pte = 0000000000000000 Oops: 0000 [#1] SMP Modules linked in: Pid: 1638, comm: apache2 Not tainted 3.0.4-linode37 #1 EIP: 0061:[<c01abc54>] EFLAGS: 00210246 CPU: 3 EIP is at swap_count_continued+0x104/0x180 .. snip.. Call Trace: [<c01ac222>] ? __swap_duplicate+0xc2/0x160 [<c01040f7>] ? pte_mfn_to_pfn+0x87/0xe0 [<c01ac2e4>] ? swap_duplicate+0x14/0x40 [<c01a0a6b>] ? copy_pte_range+0x45b/0x500 [<c01a0ca5>] ? copy_page_range+0x195/0x200 [<c01328c6>] ? dup_mmap+0x1c6/0x2c0 [<c0132cf8>] ? dup_mm+0xa8/0x130 [<c013376a>] ? copy_process+0x98a/0xb30 [<c013395f>] ? do_fork+0x4f/0x280 [<c01573b3>] ? getnstimeofday+0x43/0x100 [<c010f770>] ? sys_clone+0x30/0x40 [<c06c048d>] ? ptregs_clone+0x15/0x48 [<c06bfb71>] ? syscall_call+0x7/0xb The problem is that in copy_page_range() we turn lazy mode on, and then in swap_entry_free() we call swap_count_continued() which ends up in: map = kmap_atomic(page, KM_USER0) + offset; and then later we touch *map. Since we are running in batched mode (lazy) we don't actually set up the PTE mappings and the kmap_atomic is not done synchronously and ends up trying to dereference a page that has not been set. Looking at kmap_atomic_prot_pfn(), it uses 'arch_flush_lazy_mmu_mode' and doing the same in kmap_atomic_prot() and __kunmap_atomic() makes the problem go away. Interestingly, commit b8bcfe997e4615 ("x86/paravirt: remove lazy mode in interrupts") removed part of this to fix an interrupt issue - but it went to far and did not consider this scenario. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-05Merge branch 'master' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless into for-davem
2011-12-05Merge branch 'ucode' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp ↵Ingo Molnar
into x86/urgent
2011-12-05x86: Fix "Acer Aspire 1" reboot hangPeter Chubb
Looks like on some Acer Aspire 1s with older bioses, reboot via bios fails. It works on my machine, (with BIOS version 0.3310) but not on some others (BIOS version 0.3309). There's a log of problems at: https://bbs.archlinux.org/viewtopic.php?id=124136 This patch adds a different callback to the reboot quirk table, to allow rebooting via keybaord controller. Reported-by: Uroš Vampl <mobile.leecher@gmail.com> Tested-by: Vasily Khoruzhick <anarsoul@gmail.com> Signed-off-by: Peter Chubb <peter.chubb@nicta.com.au> Cc: Don Zickus <dzickus@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: stable@kernel.org Link: http://lkml.kernel.org/r/1323093233-9481-1-git-send-email-anarsoul@gmail.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-05x86/mtrr: Resolve inconsistency with Intel processor manualAjaykumar Hotchandani
Following is from Notes of section 11.5.3 of Intel processor manual available at: http://www.intel.com/Assets/PDF/manual/325384.pdf For the Pentium 4 and Intel Xeon processors, after the sequence of steps given above has been executed, the cache lines containing the code between the end of the WBINVD instruction and before the MTRRS have actually been disabled may be retained in the cache hierarchy. Here, to remove code from the cache completely, a second WBINVD instruction must be executed after the MTRRs have been disabled. This patch provides resolution for that. Ideally, I will like to make changes only for Pentium 4 and Xeon processors. But, I am not finding easier way to do it. And, extra wbinvd() instruction does not hurt much for other processors. Signed-off-by: Ajaykumar Hotchandani <ajaykumar.hotchandani@oracle.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Lucas De Marchi <lucas.demarchi@profusion.mobi> Link: http://lkml.kernel.org/r/4EBD1CC5.3030008@oracle.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-05Merge branch 'tip/perf/urgent' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into perf/urgent
2011-12-05x86: Document rdmsr_safe restrictionsBorislav Petkov
Recently, I got bitten by using rdmsr_safe too early in the boot process. Document its shortcomings for future reference. Link: http://lkml.kernel.org/r/4ED5B70F.606@lwfinger.net Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2011-12-05x86, microcode: Fix the failure path of microcode update driver init codeSrivatsa S. Bhat
The microcode update driver's initialization code does not handle failures correctly. This patch fixes this issue. Signed-off-by: Jan Beulich <JBeulich@suse.com> Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/20111107123530.12164.31227.stgit@srivatsabhat.in.ibm.com Link: http://lkml.kernel.org/r/4ED8E2270200007800065120@nat28.tlf.novell.com Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2011-12-05Add TAINT_FIRMWARE_WORKAROUND on MTRR fixupPrarit Bhargava
TAINT_FIRMWARE_WORKAROUND should be set when an MTRR fixup is done. Signed-off-by: Prarit Bhargava <prarit@redhat.com> Acked-by: David Rientjes <rientjes@google.com> Link: http://lkml.kernel.org/r/1318958650-12447-1-git-send-email-prarit@redhat.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-05x86/mpparse: Account for bus types other than ISA and PCIBjorn Helgaas
In commit f8924e770e04 ("x86: unify mp_bus_info"), the 32-bit and 64-bit versions of MP_bus_info were rearranged to match each other better. Unfortunately it introduced a regression: prior to that change we used to always set the mp_bus_not_pci bit, then clear it if we found a PCI bus. After it, we set mp_bus_not_pci for ISA buses, clear it for PCI buses, and leave it alone otherwise. In the cases of ISA and PCI, there's not much difference. But ISA is not the only non-PCI bus, so it's better to always set mp_bus_not_pci and clear it only for PCI. Without this change, Dan's Dell PowerEdge 4200 panics on boot with a log indicating interrupt routing trouble unless the "noapic" option is supplied. With this change, the machine boots reliably without "noapic". Fixes http://bugs.debian.org/586494 Reported-bisected-and-tested-by: Dan McGrath <troubledaemon@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: stable@vger.kernel.org # 2.6.26+ Cc: Dan McGrath <troubledaemon@gmail.com> Cc: Alexey Starikovskiy <aystarik@gmail.com> [jrnieder@gmail.com: clarified commit message] Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Link: http://lkml.kernel.org/r/20111122215000.GA9151@elie.hsd1.il.comcast.net Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-05x86, mrst: Change the pmic_gpio device type to IPCFeng Tang
In latest firmware's SFI tables, pmic_gpio has been set to IPC type of device, so we need handle it too. Signed-off-by: Feng Tang <feng.tang@intel.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-05mrst: Added some platform data for the SFI translationsJekyll Lai
Add SFI glue for the following devices: tca6416: a gpio expander compatible with max7315 mpu3050: gyro sensor Both of these actual drivers are already upstream Signed-off-by: Jekyll Lai <jekyll_lai@wistron.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-05x86,mrst: Power control commands updateJacob Pan
On the Intel MID devices SCU commands are issued to manage power off and the like. We need to issue different ones for non-Lincroft based devices. Signed-off-by: Alek Du <alek.du@intel.com> Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-05mtd: gpmi: add missing include 'module.h'Wolfram Sang
Fixes: drivers/mtd/nand/gpmi-nand/gpmi-nand.c: In function 'gpmi_nfc_init': drivers/mtd/nand/gpmi-nand/gpmi-nand.c:1475:16: error: 'THIS_MODULE' undeclared (first use in this function) drivers/mtd/nand/gpmi-nand/gpmi-nand.c:1475:16: note: each undeclared identifier is reported only once for each function it appears in drivers/mtd/nand/gpmi-nand/gpmi-nand.c: At top level: drivers/mtd/nand/gpmi-nand/gpmi-nand.c:1617:15: error: expected declaration specifiers or '...' before string constant drivers/mtd/nand/gpmi-nand/gpmi-nand.c:1617:1: warning: data definition has no type or storage class drivers/mtd/nand/gpmi-nand/gpmi-nand.c:1617:1: warning: type defaults to 'int' in declaration of 'MODULE_AUTHOR' and some more... Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Huang Shijie <b32955@freescale.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2011-12-05x86/reboot: Blacklist Dell OptiPlex 990 known to require PCI rebootRafael J. Wysocki
Dell OptiPlex 990 is known to require PCI reboot, so add it to the reboot blacklist in pci_reboot_dmi_table[]. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Link: http://lkml.kernel.org/r/201111160019.51303.rjw@sisk.pl Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-05ARM: davinci: dm365 evm: align nand partition table to u-bootShankarmurthy,Akshay
Current partition information maintained in kernel does not match with u-boot, this leads to corruption of u-boot env when we update uImage from kernel. Patch fixes it to match with u-boot partition information. Signed-off-by: Shankarmurthy,Akshay <akshay.s@ti.com> Signed-off-by: Sekhar Nori <nsekhar@ti.com>
2011-12-05ARM: davinci: da850 evm: change audio edma event queue to EVENTQ_0Manjunathappa, Prakash
On OMAP-L138 platform, EDMA event queue 0 should be used for audio transfers so that they are not starved by video data moving on event queue 1. Commit 48519f0ae03bc7e86b3dc93e56f1334d53803770 (ASoC: davinci: let platform data define edma queue numbers) had a side-effect of changing this behavior by making the driver actually honor the platform data passed. Fix this now by passing event queue 0 as the queue to be used for audio transfers. Signed-off-by: Manjunathappa, Prakash <prakash.pm@ti.com> Signed-off-by: Sekhar Nori <nsekhar@ti.com> Cc: <stable@vger.kernel.org> # v2.6.36.x and above
2011-12-05ARM: davinci: dm646x evm: wrong register used in setup_vpif_input_channel_modeHans Verkuil
The function setup_vpif_input_channel_mode() used the VSCLKDIS register instead of VIDCLKCTL. This meant that when in HD mode videoport channel 0 used a different clock from channel 1. Clearly a copy-and-paste error. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Acked-by: Manjunath Hadli <manjunath.hadli@ti.com> Signed-off-by: Sekhar Nori <nsekhar@ti.com> Cc: stable@kernel.org
2011-12-05ARM: davinci: dm646x does not have a DSP domainSekhar Nori
Fix the incorrect classification of DSP clock into a seperate DSP domain on DM646x. Per the reference guide (http://www.ti.com/lit/ug/spruep9e/spruep9e.pdf) there is only one "AlwaysON" power domain on DM6467. Signed-off-by: Sekhar Nori <nsekhar@ti.com>
2011-12-05ARM: davinci: psc: fix incorrect offsetsMurali Karicheri
Seperate PDSTAT and PDCTL registers are defined for domain 0 and domain 1 where as the code always reads the domain 0 PDSTAT register and domain 1 PDCTL register. Fix this issue. While at it, introduce usage of macros for register masks to improve readability. Reviewed-by: Sergei Shtylyov <sshtylyov@mvista.com> Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: Sekhar Nori <nsekhar@ti.com>
2011-12-05ARM: davinci: psc: fix incorrect maskMurali Karicheri
There are 5 LSB bits defined in PDSTAT and the code currently uses a mask of 1 bit to check the status. Use a proper mask per the hardware specification. While at it, use a #define for the mask to improve readability. Reviewed-by: Sergei Shtylyov <sshtylyov@mvista.com> Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: Sekhar Nori <nsekhar@ti.com>
2011-12-05x86, UV: Fix UV2 hub part numberJack Steiner
There was a mixup when the SGI UV2 hub chip was sent to be fabricated, and it ended up with the wrong part number in the HRP_NODE_ID mmr. Future versions of the chip will (may) have the correct part number. Change the UV infrastructure to recognize both part numbers as valid IDs of a UV2 hub chip. Signed-off-by: Jack Steiner <steiner@sgi.com> Link: http://lkml.kernel.org/r/20111129210058.GA20452@sgi.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-05x86: Add user_mode_vm check in stack_overflow_checkMitsuo Hayasaka
The kernel stack overflow is checked in stack_overflow_check(), which may wrongly detect the overflow if the stack pointer in user space points to the kernel stack intentionally or accidentally. So, the actual overflow is never detected after this misdetection because WARN_ONCE() is used on the detection of it. This patch adds user-mode-vm checking before it to avoid this problem and bails out early if the user stack is used. Signed-off-by: Mitsuo Hayasaka <mitsuo.hayasaka.hu@hitachi.com> Cc: yrl.pp-manager.tt@hitachi.com Cc: Randy Dunlap <rdunlap@xenotime.net> Link: http://lkml.kernel.org/r/20111129060821.11076.55315.stgit@ltc219.sdl.hitachi.co.jp Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: "H. Peter Anvin" <hpa@zytor.com>
2011-12-05Merge branch 'perf/urgent' of git://github.com/acmel/linux into perf/urgentIngo Molnar
2011-12-05slab, lockdep: Fix silly bugPeter Zijlstra
Commit 30765b92 ("slab, lockdep: Annotate the locks before using them") moves the init_lock_keys() call from after g_cpucache_up = FULL, to before it. And overlooks the fact that init_node_lock_keys() tests for it and ignores everything !FULL. Introduce a LATE stage and change the lockdep test to be <LATE. Acked-by: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: stable@kernel.org Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-05perf: Fix loss of notification with multi-eventPeter Zijlstra
When you do: $ perf record -e cycles,cycles,cycles noploop 10 You expect about 10,000 samples for each event, i.e., 10s at 1000samples/sec. However, this is not what's happening. You get much fewer samples, maybe 3700 samples/event: $ perf report -D | tail -15 Aggregated stats: TOTAL events: 10998 MMAP events: 66 COMM events: 2 SAMPLE events: 10930 cycles stats: TOTAL events: 3644 SAMPLE events: 3644 cycles stats: TOTAL events: 3642 SAMPLE events: 3642 cycles stats: TOTAL events: 3644 SAMPLE events: 3644 On a Intel Nehalem or even AMD64, there are 4 counters capable of measuring cycles, so there is plenty of space to measure those events without multiplexing (even with the NMI watchdog active). And even with multiplexing, we'd expect roughly the same number of samples per event. The root of the problem was that when the event that caused the buffer to become full was not the first event passed on the cmdline, the user notification would get lost. The notification was sent to the file descriptor of the overflowed event but the perf tool was not polling on it. The perf tool aggregates all samples into a single buffer, i.e., the buffer of the first event. Consequently, it assumes notifications for any event will come via that descriptor. The seemingly straight forward solution of moving the waitq into the ringbuffer object doesn't work because of life-time issues. One could perf_event_set_output() on a fd that you're also blocking on and cause the old rb object to be freed while its waitq would still be referenced by the blocked thread -> FAIL. Therefore link all events to the ringbuffer and broadcast the wakeup from the ringbuffer object to all possible events that could be waited upon. This is rather ugly, and we're open to better solutions but it works for now. Reported-by: Stephane Eranian <eranian@google.com> Finished-by: Stephane Eranian <eranian@google.com> Reviewed-by: Stephane Eranian <eranian@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20111126014731.GA7030@quad Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-05perf, x86: Force IBS LVT offset assignment for family 10hRobert Richter
On AMD family 10h we see firmware bug messages like the following: [Firmware Bug]: cpu 6, try to use APIC500 (LVT offset 0) for vector 0x10400, but the register is already in use for vector 0xf9 on another cpu [Firmware Bug]: cpu 6, IBS interrupt offset 0 not available (MSRC001103A=0x0000000000000100) [Firmware Bug]: using offset 1 for IBS interrupts [Firmware Bug]: workaround enabled for IBS LVT offset perf: AMD IBS detected (0x00000007) We always see this, since the offsets are not assigned by the BIOS for this family. Force LVT offset assignment in this case. If the OS assignment fails, fallback to BIOS settings and try to setup this. The fallback to BIOS settings weakens the family check since force_ibs_eilvt_setup() may fail e.g. in case of virtual machines. But setup may still succeed if BIOS offsets are correct. Other families don't have a workaround implemented that assigns LVT offsets. It's ok, to drop calling force_ibs_eilvt_setup() for that families. With the patch the [Firmware Bug] messages vanish. We see now: IBS: LVT offset 1 assigned perf: AMD IBS detected (0x00000007) Signed-off-by: Robert Richter <robert.richter@amd.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20111109162225.GO12451@erda.amd.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-05perf, x86: Disable PEBS on SandyBridge chipsPeter Zijlstra
Cc: Stephane Eranian <eranian@google.com> Cc: stable@kernel.org Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-04ASoC: Make SND_SOC_MX27VIS_AIC32X4 depend on I2CAxel Lin
SND_SOC_MX27VIS_AIC32X4 selects SND_SOC_TLV320AIC32X4, but SND_SOC_TLV320AIC32X4 needs CONFIG_I2C. So we need to make SND_SOC_MX27VIS_AIC32X4 depend on I2C. otherwise I got below build error if CONFIG_I2C is not selected. CC sound/soc/codecs/tlv320aic32x4.o sound/soc/codecs/tlv320aic32x4.c: In function 'aic32x4_read': sound/soc/codecs/tlv320aic32x4.c:323: error: implicit declaration of function 'i2c_smbus_read_byte_data' sound/soc/codecs/tlv320aic32x4.c: In function 'aic32x4_probe': sound/soc/codecs/tlv320aic32x4.c:641: error: 'i2c_master_send' undeclared (first use in this function) sound/soc/codecs/tlv320aic32x4.c:641: error: (Each undeclared identifier is reported only once sound/soc/codecs/tlv320aic32x4.c:641: error: for each function it appears in.) sound/soc/codecs/tlv320aic32x4.c: In function 'aic32x4_modinit': sound/soc/codecs/tlv320aic32x4.c:763: error: implicit declaration of function 'i2c_add_driver' sound/soc/codecs/tlv320aic32x4.c: In function 'aic32x4_exit': sound/soc/codecs/tlv320aic32x4.c:774: error: implicit declaration of function 'i2c_del_driver' make[3]: *** [sound/soc/codecs/tlv320aic32x4.o] Error 1 make[2]: *** [sound/soc/codecs] Error 2 make[1]: *** [sound/soc] Error 2 make: *** [sound] Error 2 Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2011-12-04ASoC: Fix dependency for SND_SOC_RAUMFELD and SND_PXA2XX_SOC_HX4700Axel Lin
SND_SOC_RAUMFELD selects SND_SOC_CS4270 which needs CONFIG_I2C, and also selects SND_SOC_AK4104 which needs SPI_MASTER. Thus make SND_SOC_RAUMFELD depend on I2C && SPI_MASTER. Add depend on SPI_MASTER to fix below build error if CONFIG_SPI_MASTER is not selected. LD .tmp_vmlinux1 sound/built-in.o: In function `ak4104_spi_write': last.c:(.text+0x290cc): undefined reference to `spi_sync' sound/built-in.o: In function `ak4104_probe': last.c:(.text+0x292a0): undefined reference to `spi_write_then_read' sound/built-in.o: In function `ak4104_spi_probe': last.c:(.text+0x29398): undefined reference to `spi_setup' sound/built-in.o: In function `ak4104_init': last.c:(.init.text+0x4ec): undefined reference to `spi_register_driver' make: *** [.tmp_vmlinux1] Error 1 Add depend on I2C to fix below build error if CONFIG_I2C is not selected: CC sound/soc/codecs/cs4270.o sound/soc/codecs/cs4270.c: In function 'cs4270_i2c_probe': sound/soc/codecs/cs4270.c:657: error: implicit declaration of function 'i2c_smbus_read_byte_data' sound/soc/codecs/cs4270.c: In function 'cs4270_init': sound/soc/codecs/cs4270.c:730: error: implicit declaration of function 'i2c_add_driver' sound/soc/codecs/cs4270.c: In function 'cs4270_exit': sound/soc/codecs/cs4270.c:736: error: implicit declaration of function 'i2c_del_driver' make[3]: *** [sound/soc/codecs/cs4270.o] Error 1 make[2]: *** [sound/soc/codecs] Error 2 make[1]: *** [sound/soc] Error 2 make: *** [sound] Error 2 SND_PXA2XX_SOC_HX4700 selects SND_SOC_AK4641 which needs CONFIG_I2C. Thus make SND_PXA2XX_SOC_HX4700 depend on I2C. Add depend on I2C to fix below build error if CONFIG_I2C is not selected: CC sound/soc/codecs/ak4641.o sound/soc/codecs/ak4641.c: In function 'ak4641_modinit': sound/soc/codecs/ak4641.c:646: error: implicit declaration of function 'i2c_add_driver' sound/soc/codecs/ak4641.c: In function 'ak4641_exit': sound/soc/codecs/ak4641.c:656: error: implicit declaration of function 'i2c_del_driver' make[3]: *** [sound/soc/codecs/ak4641.o] Error 1 make[2]: *** [sound/soc/codecs] Error 2 make[1]: *** [sound/soc] Error 2 make: *** [sound] Error 2 Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2011-12-04ASoC: uda1380: Return proper error in uda1380_modinit failure pathAxel Lin
Return proper error for uda1380_modinit if i2c_add_driver() fails. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2011-12-04x86: Fix boot failures on older AMD CPU'sLinus Torvalds
People with old AMD chips are getting hung boots, because commit bcb80e53877c ("x86, microcode, AMD: Add microcode revision to /proc/cpuinfo") moved the microcode detection too early into "early_init_amd()". At that point we are *so* early in the booth that the exception tables haven't even been set up yet, so the whole rdmsr_safe(MSR_AMD64_PATCH_LEVEL, &c->microcode, &dummy); doesn't actually work: if the rdmsr does a GP fault (due to non-existant MSR register on older CPU's), we can't fix it up yet, and the boot fails. Fix it by simply moving the code to a slightly later point in the boot (init_amd() instead of early_init_amd()), since the kernel itself doesn't even really care about the microcode patchlevel at this point (or really ever: it's made available to user space in /proc/cpuinfo, and updated if you do a microcode load). Reported-tested-and-bisected-by: Larry Finger <Larry.Finger@lwfinger.net> Tested-by: Bob Tracy <rct@gherkin.frus.com> Acked-by: Borislav Petkov <borislav.petkov@amd.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-12-04sbus: convert drivers/sbus/char/* to use module_platform_driver()Axel Lin
This patch converts the drivers in drivers/sbus/char/* to use the module_platform_driver() macro which makes the code smaller and a bit simpler. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-12-04bbc_i2c: Remove unneeded err variableAxel Lin
Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-12-04sparc: Use kmemdup rather than duplicating its implementationThomas Meyer
The semantic patch that makes this change is available in scripts/coccinelle/api/memdup.cocci. Signed-off-by: Thomas Meyer <thomas@m3y3r.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-12-03arch/tile: use new generic {enable,disable}_percpu_irq() routinesChris Metcalf
We provided very similar routines internally, but now we can hook into the generic framework by supplying our routines as function pointers in the irq_chip structure instead. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2011-12-03drivers/net/ethernet/tile: use skb_frag_page() APIChris Metcalf
This replaces raw access to the "page" field of the skb_frag_t. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> Acked-by: David S. Miller <davem@davemloft.net>
2011-12-03asm-generic/unistd.h: support new process_vm_{readv,write} syscallsChris Metcalf
Also prototype the "compat" functions so they can be referenced from C code. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2011-12-03arch/tile: fix double-free bug in homecache_free_pages()Chris Metcalf
When freeing the page with this API, the page was "put" twice. This was only discovered bringing up an MPT fusion controller, which actually used the API; it hadn't been invoked previously, so the bug had gone unnoticed. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2011-12-03arch/tile: add a few #includes and an EXPORT to catch up with kernel changes.Chris Metcalf
The empty_zero_page[] export is required for ZERO_PAGE() module references. The #includes are due to changes in implicit inclusion, and should of course have been in the sources from the beginning. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
generated by cgit (git 2.34.1) at 2025-09-13 15:21:00 +0000