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2016-05-05perf/arm: Special-case hetereogeneous CPUsMark Rutland
Commit: 26657848502b7847 ("perf/core: Verify we have a single perf_hw_context PMU") forcefully prevents multiple PMUs from sharing perf_hw_context, as this generally doesn't make sense. It is a common bug for uncore PMUs to use perf_hw_context rather than perf_invalid_context, which this detects. However, systems exist with heterogeneous CPUs (and hence heterogeneous HW PMUs), for which sharing perf_hw_context is necessary, and possible in some limited cases. To make this work we have to perform some gymnastics, as we did in these commits: 66eb579e66ecfea5 ("perf: allow for PMU-specific event filtering") c904e32a69b7c779 ("arm: perf: filter unschedulable events") To allow those systems to work, we must allow PMUs for heterogeneous CPUs to share perf_hw_context, though we must still disallow sharing otherwise to detect the common misuse of perf_hw_context. This patch adds a new PERF_PMU_CAP_HETEROGENEOUS_CPUS for this, updates the core logic to account for this, and makes use of it in the arm_pmu code that is used for systems with heterogeneous CPUs. Comments are added to make the rationale clear and hopefully avoid accidental abuse. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: Will Deacon <will.deacon@arm.com> Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/20160426103346.GA20836@leverpostej Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-05-05perf/core: Introduce address range filteringAlexander Shishkin
Many instruction tracing PMUs out there support address range-based filtering, which would, for example, generate trace data only for a given range of instruction addresses, which is useful for tracing individual functions, modules or libraries. Other PMUs may also utilize this functionality to allow filtering to or filtering out code at certain address ranges. This patch introduces the interface for userspace to specify these filters and for the PMU drivers to apply these filters to hardware configuration. The user interface is an ASCII string that is passed via an ioctl() and specifies (in the form of an ASCII string) address ranges within certain object files or within kernel. There is no special treatment for kernel modules yet, but it might be a worthy pursuit. The PMU driver interface basically adds two extra callbacks to the PMU driver structure, one of which validates the filter configuration proposed by the user against what the hardware is actually capable of doing and the other one translates hardware-independent filter configuration into something that can be programmed into the hardware. Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Arnaldo Carvalho de Melo <acme@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: vince@deater.net Link: http://lkml.kernel.org/r/1461771888-10409-6-git-send-email-alexander.shishkin@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-05-05Merge branch 'perf/urgent' into perf/core, to pick up fixesIngo Molnar
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-04-29Merge tag 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma Pull rdma fixes from Doug Ledford: "Final set of -rc fixes for 4.6. I've collected up a number of patches that are all pretty small with the exception of only a couple. The hfi1 driver has a number of important patches, and it is what really drives the line count of this pull request up. These are all small and I've got this kernel built and running in the test lab (I have most of the hardware, I think nes is the only thing in this patch set that I can't say I've personally tested and have up and running). Summary: - A number of collected fixes for oopses, memory corruptions, deadlocks, etc. All of these fixes are small (many only 5-10 lines), obvious, and tested. - Fix for the security issue related to the use of write for bi-directional communications" * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: RDMA/nes: don't leak skb if carrier down IB/security: Restrict use of the write() interface IB/hfi1: Use kernel default llseek for ui device IB/hfi1: Don't attempt to free resources if initialization failed IB/hfi1: Fix missing lock/unlock in verbs drain callback IB/rdmavt: Fix send scheduling IB/hfi1: Prevent unpinning of wrong pages IB/hfi1: Fix deadlock caused by locking with wrong scope IB/hfi1: Prevent NULL pointer deferences in caching code MAINTAINERS: Update iser/isert maintainer contact info IB/mlx5: Expose correct max_sge_rd limit RDMA/iw_cxgb4: Fix bar2 virt addr calculation for T4 chips iw_cxgb4: handle draining an idle qp iw_cxgb3: initialize ibdev.iwcm->ifname for port mapping iw_cxgb4: initialize ibdev.iwcm->ifname for port mapping IB/core: Don't drain non-existent rq queue-pair IB/core: Fix oops in ib_cache_gid_set_default_gid
2016-04-29Merge branch 'akpm' (patches from Andrew)Linus Torvalds
Merge fixes from Andrew Morton: "20 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: Documentation/sysctl/vm.txt: update numa_zonelist_order description lib/stackdepot.c: allow the stack trace hash to be zero rapidio: fix potential NULL pointer dereference mm/memory-failure: fix race with compound page split/merge ocfs2/dlm: return zero if deref_done message is successfully handled Ananth has moved kcov: don't profile branches in kcov kcov: don't trace the code coverage code mm: wake kcompactd before kswapd's short sleep .mailmap: add Frank Rowand mm/hwpoison: fix wrong num_poisoned_pages accounting mm: call swap_slot_free_notify() with page lock held mm: vmscan: reclaim highmem zone if buffer_heads is over limit numa: fix /proc/<pid>/numa_maps for THP mm/huge_memory: replace VM_NO_THP VM_BUG_ON with actual VMA check mailmap: fix Krzysztof Kozlowski's misspelled name thp: keep huge zero page pinned until tlb flush mm: exclude HugeTLB pages from THP page_mapped() logic kexec: export OFFSET(page.compound_head) to find out compound tail page kexec: update VMCOREINFO for compound_order/dtor
2016-04-28Merge branch 'locking-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking fixes from Ingo Molnar: "Two lockdep fixes" * 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: lockdep: Fix lock_chain::base size locking/lockdep: Fix ->irq_context calculation
2016-04-28Merge tag 'media/v4.6-4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media Pull media fixes from Mauro Carvalho Chehab: "Some regression fixes: - videobuf2 core: avoid the risk of going past buffer on multi-planes and fix rw mode - fix support for 4K formats at V4L2 core - fix a trouble at davinci_fpe, caused by a bad patch - usbvision: revert a patch with a partial fixup. The fixup patch was merged already, and this one has some issues" * tag 'media/v4.6-4' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: [media] vb2-memops: Fix over allocation of frame vectors [media] media: vb2: Fix regression on poll() for RW mode [media] v4l2-dv-timings.h: fix polarity for 4k formats [media] davinci_vpfe: Revert "staging: media: davinci_vpfe: remove,unnecessary ret variable" [media] usbvision: revert commit 588afcc1 [media] videobuf2-v4l2: Verify planes array in buffer dequeueing [media] videobuf2-core: Check user space planes array in dqbuf
2016-04-28Merge tag 'sound-4.6-rc6' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound Pull sound fixes from Takashi Iwai: "Usually we get a big collection of fixes for ASoC once during rc. And this is it. At this time, most of fixes are about Intel Skylake ASoC driver, which is a new and still on-going development. Along with it, a slight large LOC is seen in legacy HD-audio driver, but it's merely a code move to the upper layer. Other than that, the rest are small or trivial fixes to various drivers, in addition to an ASoC dapm debugfs code fix" * tag 'sound-4.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (24 commits) ALSA: hda - Update BCLK also at hotplug for i915 HSW/BDW ALSA: hda - Add dock support for ThinkPad X260 ASoC: wm5102: Free compressed IRQ in CODEC remove ASoC: arizona: Free speaker thermal IRQs in CODEC remove ASoC: Intel: Skylake: Fix ibs/obs calc for non-integral sampling rates ASoC: Intel: sst: fix a loop timeout in sst_hsw_stream_reset() ASoC: Intel: Skylake: Fix to turn OFF codec power when entering S3 ASoC: hdac_hdmi: Fix codec power state in S3 during playback ASoC: hdac_hdmi: Fix to use dev_pm ops instead soc pm ASoC: wm8962: Correct typo when setting DSPCLK rate ASoC: nau8825: Fix jack detection across suspend ASoC: Intel: Skylake: Fix DSP resource de-allocation ASoC: Intel: Skylake: Fix for unloading module only when it is loaded ASoC: Intel: Skylake: Fix kbuild dependency ASoC: dapm: Make sure we have a card when displaying component widgets ASoC: rt5640: Correct the digital interface data select ASoC: Intel: Skylake: remove call to pci_dev_put ASoC: Intel: Skylake: Call i915 exit last ASoC: Intel: Skylake: Unmap the address last ASoC: Intel: Skylake: Freeup properly on skl_dsp_free ...
2016-04-28numa: fix /proc/<pid>/numa_maps for THPGerald Schaefer
In gather_pte_stats() a THP pmd is cast into a pte, which is wrong because the layouts may differ depending on the architecture. On s390 this will lead to inaccurate numa_maps accounting in /proc because of misguided pte_present() and pte_dirty() checks on the fake pte. On other architectures pte_present() and pte_dirty() may work by chance, but there may be an issue with direct-access (dax) mappings w/o underlying struct pages when HAVE_PTE_SPECIAL is set and THP is available. In vm_normal_page() the fake pte will be checked with pte_special() and because there is no "special" bit in a pmd, this will always return false and the VM_PFNMAP | VM_MIXEDMAP checking will be skipped. On dax mappings w/o struct pages, an invalid struct page pointer would then be returned that can crash the kernel. This patch fixes the numa_maps THP handling by introducing new "_pmd" variants of the can_gather_numa_stats() and vm_normal_page() functions. Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com> Cc: Konstantin Khlebnikov <koct9i@gmail.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Jerome Marchand <jmarchan@redhat.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Michael Holzheu <holzheu@linux.vnet.ibm.com> Cc: <stable@vger.kernel.org> [4.3+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-04-28thp: keep huge zero page pinned until tlb flushKirill A. Shutemov
Andrea has found[1] a race condition on MMU-gather based TLB flush vs split_huge_page() or shrinker which frees huge zero under us (patch 1/2 and 2/2 respectively). With new THP refcounting, we don't need patch 1/2: mmu_gather keeps the page pinned until flush is complete and the pin prevents the page from being split under us. We still need patch 2/2. This is simplified version of Andrea's patch. We don't need fancy encoding. [1] http://lkml.kernel.org/r/1447938052-22165-1-git-send-email-aarcange@redhat.com Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reported-by: Andrea Arcangeli <aarcange@redhat.com> Reviewed-by: Andrea Arcangeli <aarcange@redhat.com> Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Hugh Dickins <hughd@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-04-28mm: exclude HugeTLB pages from THP page_mapped() logicSteve Capper
HugeTLB pages cannot be split, so we use the compound_mapcount to track rmaps. Currently page_mapped() will check the compound_mapcount, but will also go through the constituent pages of a THP compound page and query the individual _mapcount's too. Unfortunately, page_mapped() does not distinguish between HugeTLB and THP compound pages and assumes that a compound page always needs to have HPAGE_PMD_NR pages querying. For most cases when dealing with HugeTLB this is just inefficient, but for scenarios where the HugeTLB page size is less than the pmd block size (e.g. when using contiguous bit on ARM) this can lead to crashes. This patch adjusts the page_mapped function such that we skip the unnecessary THP reference checks for HugeTLB pages. Fixes: e1534ae95004 ("mm: differentiate page_mapped() from page_mapcount() for compound pages") Signed-off-by: Steve Capper <steve.capper@arm.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Ingo Molnar <mingo@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-04-28Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client Pull Ceph fixes from Sage Weil: "There is a lifecycle fix in the auth code, a fix for a narrow race condition on map, and a helpful message in the log when there is a feature mismatch (which happens frequently now that the default server-side options have changed)" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: rbd: report unsupported features to syslog rbd: fix rbd map vs notify races libceph: make authorizer destruction independent of ceph_auth_client
2016-04-28IB/security: Restrict use of the write() interfaceJason Gunthorpe
The drivers/infiniband stack uses write() as a replacement for bi-directional ioctl(). This is not safe. There are ways to trigger write calls that result in the return structure that is normally written to user space being shunted off to user specified kernel memory instead. For the immediate repair, detect and deny suspicious accesses to the write API. For long term, update the user space libraries and the kernel API to something that doesn't present the same security vulnerabilities (likely a structured ioctl() interface). The impacted uAPI interfaces are generally only available if hardware from drivers/infiniband is installed in the system. Reported-by: Jann Horn <jann@thejh.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> [ Expanded check to all known write() entry points ] Cc: stable@vger.kernel.org Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-04-28IB/mlx5: Expose correct max_sge_rd limitSagi Grimberg
mlx5 devices (Connect-IB, ConnectX-4, ConnectX-4-LX) has a limitation where rdma read work queue entries cannot exceed 512 bytes. A rdma_read wqe needs to fit in 512 bytes: - wqe control segment (16 bytes) - rdma segment (16 bytes) - scatter elements (16 bytes each) So max_sge_rd should be: (512 - 16 - 16) / 16 = 30. Cc: linux-stable@vger.kernel.org Reported-by: Christoph Hellwig <hch@lst.de> Tested-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Sagi Grimberg <sagig@grimberg.me> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-04-27Merge branch 'for-4.6-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup Pull cgroup fixes from Tejun Heo: "Two patches to fix a deadlock which can be easily triggered if memcg charge moving is used. This bug was introduced while converting threadgroup locking to a global percpu_rwsem and is caused by cgroup controller task migration path depending on the ability to create new kthreads. cpuset had a similar issue which was fixed by performing heavy-lifting operations asynchronous to task migration. The two patches fix the same issue in memcg in a similar way. The first patch makes the mechanism generic and the second relocates memcg charge moving outside the migration path. Given that we don't want to perform heavy operations while writelocking threadgroup lock anyway, moving them out of the way is a desirable solution. One thing to note is that the problem was difficult to debug because lockdep couldn't figure out the deadlock condition. Looking into how to improve that" * 'for-4.6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: memcg: relocate charge moving from ->attach to ->post_attach cgroup, cpuset: replace cpuset_post_attach_flush() with cgroup_subsys->post_attach callback
2016-04-27Merge tag 'asoc-fix-v4.6-rc5' of ↵Takashi Iwai
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus ASoC: Fixes for v4.6 This is a fairly large collection of fixes but almost all driver specific ones, especially to the new Intel drivers which have had a lot of recent development. The one core fix is a change to the debugfs code to avoid crashes in some relatively unusual configurations.
2016-04-27perf core: Allow setting up max frame stack depth via sysctlArnaldo Carvalho de Melo
The default remains 127, which is good for most cases, and not even hit most of the time, but then for some cases, as reported by Brendan, 1024+ deep frames are appearing on the radar for things like groovy, ruby. And in some workloads putting a _lower_ cap on this may make sense. One that is per event still needs to be put in place tho. The new file is: # cat /proc/sys/kernel/perf_event_max_stack 127 Chaging it: # echo 256 > /proc/sys/kernel/perf_event_max_stack # cat /proc/sys/kernel/perf_event_max_stack 256 But as soon as there is some event using callchains we get: # echo 512 > /proc/sys/kernel/perf_event_max_stack -bash: echo: write error: Device or resource busy # Because we only allocate the callchain percpu data structures when there is a user, which allows for changing the max easily, its just a matter of having no callchain users at that point. Reported-and-Tested-by: Brendan Gregg <brendan.d.gregg@gmail.com> Reviewed-by: Frederic Weisbecker <fweisbec@gmail.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Acked-by: David Ahern <dsahern@gmail.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: Wang Nan <wangnan0@huawei.com> Cc: Zefan Li <lizefan@huawei.com> Link: http://lkml.kernel.org/r/20160426002928.GB16708@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-26Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds
Pull networking fixes from David Miller: 1) Handle v4/v6 mixed sockets properly in soreuseport, from Craig Gallak. 2) Bug fixes for the new macsec facility (missing kmalloc NULL checks, missing locking around netdev list traversal, etc.) from Sabrina Dubroca. 3) Fix handling of host routes on ifdown in ipv6, from David Ahern. 4) Fix double-fdput in bpf verifier. From Jann Horn. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (31 commits) bpf: fix double-fdput in replace_map_fd_with_map_ptr() net: ipv6: Delete host routes on an ifdown Revert "ipv6: Revert optional address flusing on ifdown." net/mlx4_en: fix spurious timestamping callbacks net: dummy: remove note about being Y by default cxgbi: fix uninitialized flowi6 ipv6: Revert optional address flusing on ifdown. ipv4/fib: don't warn when primary address is missing if in_dev is dead net/mlx5: Add pci shutdown callback net/mlx5_core: Remove static from local variable net/mlx5e: Use vport MTU rather than physical port MTU net/mlx5e: Fix minimum MTU net/mlx5e: Device's mtu field is u16 and not int net/mlx5_core: Add ConnectX-5 to list of supported devices net/mlx5e: Fix MLX5E_100BASE_T define net/mlx5_core: Fix soft lockup in steering error flow qlcnic: Update version to 5.3.64 net: stmmac: socfpga: Remove re-registration of reset controller macsec: fix netlink attribute validation macsec: add missing macsec prefix in uapi ...
2016-04-26devpts: more pty driver interface cleanupsLinus Torvalds
This is more prep-work for the upcoming pty changes. Still just code cleanup with no actual semantic changes. This removes a bunch pointless complexity by just having the slave pty side remember the dentry associated with the devpts slave rather than the inode. That allows us to remove all the "look up the dentry" code for when we want to remove it again. Together with moving the tty pointer from "inode->i_private" to "dentry->d_fsdata" and getting rid of pointless inode locking, this removes about 30 lines of code. Not only is the end result smaller, it's simpler and easier to understand. The old code, for example, depended on the d_find_alias() to not just find the dentry, but also to check that it is still hashed, which in turn validated the tty pointer in the inode. That is a _very_ roundabout way to say "invalidate the cached tty pointer when the dentry is removed". The new code just does dentry->d_fsdata = NULL; in devpts_pty_kill() instead, invalidating the tty pointer rather more directly and obviously. Don't do something complex and subtle when the obvious straightforward approach will do. The rest of the patch (ie apart from code deletion and the above tty pointer clearing) is just switching the calling convention to pass the dentry or file pointer around instead of the inode. Cc: Eric Biederman <ebiederm@xmission.com> Cc: Peter Anvin <hpa@zytor.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Peter Hurley <peter@hurleysoftware.com> Cc: Serge Hallyn <serge.hallyn@ubuntu.com> Cc: Willy Tarreau <w@1wt.eu> Cc: Aurelien Jarno <aurelien@aurel32.net> Cc: Alan Cox <gnomes@lxorguk.ukuu.org.uk> Cc: Jann Horn <jann@thejh.net> Cc: Greg KH <greg@kroah.com> Cc: Jiri Slaby <jslaby@suse.com> Cc: Florian Weimer <fw@deneb.enyo.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-04-26Revert "ipv6: Revert optional address flusing on ifdown."David S. Miller
This reverts commit 841645b5f2dfceac69b78fcd0c9050868d41ea61. Ok, this puts the feature back. I've decided to apply David A.'s bug fix and run with that rather than make everyone wait another whole release for this feature. Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-26ALSA: hda - Update BCLK also at hotplug for i915 HSW/BDWTakashi Iwai
The recent bug report suggests that BCLK setup for i915 HSW/BDW needs to be updated at each HDMI hotplug, not only at initialization and resume. That is, we need to update HSW_EM4 and HSW_EM5 registers at ELD notification, too. Otherwise the HDMI audio may be out of sync and played in a wrong pitch. However, the HDA codec driver has no access to the controller registers, and currently the code managing these registers is in hda_intel.c, i.e. local to the controller driver. For allowing the explicit BCLK update from the codec driver, as in this patch, the former haswell_set_bclk() in hda_intel.c is moved to hdac_i915.c and exposed as snd_hdac_i915_set_bclk(). This is called from both the HDA controller driver and intel_pin_eld_notify() in HDMI codec driver. Along with this change, snd_hdac_get_display_clk() gets dropped as it's no longer used. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91410 Cc: <stable@vger.kernel.org> # v4.5+ Signed-off-by: Takashi Iwai <tiwai@suse.de>
2016-04-25cgroup, cpuset: replace cpuset_post_attach_flush() with ↵Tejun Heo
cgroup_subsys->post_attach callback Since e93ad19d0564 ("cpuset: make mm migration asynchronous"), cpuset kicks off asynchronous NUMA node migration if necessary during task migration and flushes it from cpuset_post_attach_flush() which is called at the end of __cgroup_procs_write(). This is to avoid performing migration with cgroup_threadgroup_rwsem write-locked which can lead to deadlock through dependency on kworker creation. memcg has a similar issue with charge moving, so let's convert it to an official callback rather than the current one-off cpuset specific function. This patch adds cgroup_subsys->post_attach callback and makes cpuset register cpuset_post_attach_flush() as its ->post_attach. The conversion is mostly one-to-one except that the new callback is called under cgroup_mutex. This is to guarantee that no other migration operations are started before ->post_attach callbacks are finished. cgroup_mutex is one of the outermost mutex in the system and has never been and shouldn't be a problem. We can add specialized synchronization around __cgroup_procs_write() but I don't think there's any noticeable benefit. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Li Zefan <lizefan@huawei.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: <stable@vger.kernel.org> # 4.4+ prerequisite for the next patch
2016-04-25ipv6: Revert optional address flusing on ifdown.David S. Miller
This reverts the following three commits: 70af921db6f8835f4b11c65731116560adb00c14 799977d9aafbf0ca0b9c39b04cbfb16db71302c9 f1705ec197e705b79ea40fe7a2cc5acfa1d3bfac The feature was ill conceived, has terrible semantics, and has added nothing but regressions to the already fragile ipv6 stack. Fixes: f1705ec197e7 ("net: ipv6: Make address flushing on ifdown optional") Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-25libceph: make authorizer destruction independent of ceph_auth_clientIlya Dryomov
Starting the kernel client with cephx disabled and then enabling cephx and restarting userspace daemons can result in a crash: [262671.478162] BUG: unable to handle kernel paging request at ffffebe000000000 [262671.531460] IP: [<ffffffff811cd04a>] kfree+0x5a/0x130 [262671.584334] PGD 0 [262671.635847] Oops: 0000 [#1] SMP [262672.055841] CPU: 22 PID: 2961272 Comm: kworker/22:2 Not tainted 4.2.0-34-generic #39~14.04.1-Ubuntu [262672.162338] Hardware name: Dell Inc. PowerEdge R720/068CDY, BIOS 2.4.3 07/09/2014 [262672.268937] Workqueue: ceph-msgr con_work [libceph] [262672.322290] task: ffff88081c2d0dc0 ti: ffff880149ae8000 task.ti: ffff880149ae8000 [262672.428330] RIP: 0010:[<ffffffff811cd04a>] [<ffffffff811cd04a>] kfree+0x5a/0x130 [262672.535880] RSP: 0018:ffff880149aeba58 EFLAGS: 00010286 [262672.589486] RAX: 000001e000000000 RBX: 0000000000000012 RCX: ffff8807e7461018 [262672.695980] RDX: 000077ff80000000 RSI: ffff88081af2be04 RDI: 0000000000000012 [262672.803668] RBP: ffff880149aeba78 R08: 0000000000000000 R09: 0000000000000000 [262672.912299] R10: ffffebe000000000 R11: ffff880819a60e78 R12: ffff8800aec8df40 [262673.021769] R13: ffffffffc035f70f R14: ffff8807e5b138e0 R15: ffff880da9785840 [262673.131722] FS: 0000000000000000(0000) GS:ffff88081fac0000(0000) knlGS:0000000000000000 [262673.245377] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [262673.303281] CR2: ffffebe000000000 CR3: 0000000001c0d000 CR4: 00000000001406e0 [262673.417556] Stack: [262673.472943] ffff880149aeba88 ffff88081af2be04 ffff8800aec8df40 ffff88081af2be04 [262673.583767] ffff880149aeba98 ffffffffc035f70f ffff880149aebac8 ffff8800aec8df00 [262673.694546] ffff880149aebac8 ffffffffc035c89e ffff8807e5b138e0 ffff8805b047f800 [262673.805230] Call Trace: [262673.859116] [<ffffffffc035f70f>] ceph_x_destroy_authorizer+0x1f/0x50 [libceph] [262673.968705] [<ffffffffc035c89e>] ceph_auth_destroy_authorizer+0x3e/0x60 [libceph] [262674.078852] [<ffffffffc0352805>] put_osd+0x45/0x80 [libceph] [262674.134249] [<ffffffffc035290e>] remove_osd+0xae/0x140 [libceph] [262674.189124] [<ffffffffc0352aa3>] __reset_osd+0x103/0x150 [libceph] [262674.243749] [<ffffffffc0354703>] kick_requests+0x223/0x460 [libceph] [262674.297485] [<ffffffffc03559e2>] ceph_osdc_handle_map+0x282/0x5e0 [libceph] [262674.350813] [<ffffffffc035022e>] dispatch+0x4e/0x720 [libceph] [262674.403312] [<ffffffffc034bd91>] try_read+0x3d1/0x1090 [libceph] [262674.454712] [<ffffffff810ab7c2>] ? dequeue_entity+0x152/0x690 [262674.505096] [<ffffffffc034cb1b>] con_work+0xcb/0x1300 [libceph] [262674.555104] [<ffffffff8108fb3e>] process_one_work+0x14e/0x3d0 [262674.604072] [<ffffffff810901ea>] worker_thread+0x11a/0x470 [262674.652187] [<ffffffff810900d0>] ? rescuer_thread+0x310/0x310 [262674.699022] [<ffffffff810957a2>] kthread+0xd2/0xf0 [262674.744494] [<ffffffff810956d0>] ? kthread_create_on_node+0x1c0/0x1c0 [262674.789543] [<ffffffff817bd81f>] ret_from_fork+0x3f/0x70 [262674.834094] [<ffffffff810956d0>] ? kthread_create_on_node+0x1c0/0x1c0 What happens is the following: (1) new MON session is established (2) old "none" ac is destroyed (3) new "cephx" ac is constructed ... (4) old OSD session (w/ "none" authorizer) is put ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer) osd->o_auth.authorizer in the "none" case is just a bare pointer into ac, which contains a single static copy for all services. By the time we get to (4), "none" ac, freed in (2), is long gone. On top of that, a new vtable installed in (3) points us at ceph_x_destroy_authorizer(), so we end up trying to destroy a "none" authorizer with a "cephx" destructor operating on invalid memory! To fix this, decouple authorizer destruction from ac and do away with a single static "none" authorizer by making a copy for each OSD or MDS session. Authorizers themselves are independent of ac and so there is no reason for destroy_authorizer() to be an ac op. Make it an op on the authorizer itself by turning ceph_authorizer into a real struct. Fixes: http://tracker.ceph.com/issues/15447 Reported-by: Alan Zhang <alan.zhang@linux.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Sage Weil <sage@redhat.com>
2016-04-25[media] media: vb2: Fix regression on poll() for RW modeRicardo Ribalda
When using a device is read/write mode, vb2 does not handle properly the first select/poll operation. The reason for this, is that when this code has been refactored, some of the operations have changed their order, and now fileio emulator is not started. The reintroduced check to the core is enabled by a quirk flag, that avoids this check by other subsystems like DVB. Fixes: 49d8ab9feaf2 ("media] media: videobuf2: Separate vb2_poll()") Reported-by: Dimitrios Katsaros <patcherwork@gmail.com> Cc: Junghak Sung <jh1009.sung@samsung.com> Cc: <stable@vger.kernel.org> # for v4.5 and up Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
2016-04-25[media] v4l2-dv-timings.h: fix polarity for 4k formatsHans Verkuil
The VSync polarity was negative instead of positive for the 4k CEA formats. I probably copy-and-pasted these from the DMT 4k format, which does have a negative VSync polarity. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Reported-by: Martin Bugge <marbugge@cisco.com> Cc: <stable@vger.kernel.org> # for v4.1 and up Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
2016-04-24net/mlx5: Add pci shutdown callbackMajd Dibbiny
This patch introduces kexec support for mlx5. When switching kernels, kexec() calls shutdown, which unloads the driver and cleans its resources. In addition, remove unregister netdev from shutdown flow. This will allow a clean shutdown, even if some netdev clients did not release their reference from this netdev. Releasing The HW resources only is enough as the kernel is shutting down Signed-off-by: Majd Dibbiny <majd@mellanox.com> Signed-off-by: Tariq Toukan <tariqt@mellanox.com> Signed-off-by: Haggai Abramovsky <hagaya@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-24net/mlx5e: Use vport MTU rather than physical port MTUSaeed Mahameed
Set and report vport MTU rather than physical MTU, Driver will set both vport and physical port mtu and will rely on the query of vport mtu. SRIOV VFs have to report their MTU to their vport manager (PF), and this will allow them to work with any MTU they need without failing the request. Also for some cases where the PF is not a port owner, PF can work with MTU less than the physical port mtu if set physical port mtu didn't take effect. Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-24net/mlx5e: Device's mtu field is u16 and not intSaeed Mahameed
For set/query MTU port firmware commands the MTU field is 16 bits, here I changed all the "int mtu" parameters of the functions wrapping those firmware commands to be u16. Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-24macsec: add missing macsec prefix in uapiSabrina Dubroca
I accidentally forgot some MACSEC_ prefixes in if_macsec.h. Fixes: dece8d2b78d1 ("uapi: add MACsec bits") Signed-off-by: Sabrina Dubroca <sd@queasysnail.net> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-24switchdev: Adding complete operation to deferred switchdev opsElad Raz
When using switchdev deferred operation (SWITCHDEV_F_DEFER), the operation is executed in different context and the application doesn't have any way to get the operation real status. Adding a completion callback fixes that. This patch adds fields to switchdev_attr and switchdev_obj "complete_priv" field which is used by the "complete" callback. Application can set a complete function which will be called once the operation executed. Signed-off-by: Elad Raz <eladr@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Reviewed-by: Ido Schimmel <idosch@mellanox.com> Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-23Merge branch 'fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal Pull thermal fixes from Eduardo Valentin: "Specifics in this pull request: - Fixes in mediatek and OF thermal drivers - Fixes in power_allocator governor - More fixes of unsigned to int type change in thermal_core.c. These change have been CI tested using KernelCI bot. \o/" * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal: thermal: fix Mediatek thermal controller build thermal: consistently use int for trip temp thermal: fix mtk_thermal build dependency thermal: minor mtk_thermal.c cleanups thermal: power_allocator: req_range multiplication should be a 64 bit type thermal: of: add __init attribute
2016-04-23Merge tag 'asm-generic-4.6' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic Pull asm-generic update from Arnd Bergmann: "Here is one patch to wire up the preadv/pwritev system calls in the generic system call table, which is required for all architectures that were merged in the last few years, including arm64. Usually these get merged along with the syscall implementation or one of the architecture trees, but this time that did not happen. Andre and Christoph both sent a version of this patch, I picked the one I got first" * tag 'asm-generic-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: generic syscalls: wire up preadv2 and pwritev2 syscalls
2016-04-23generic syscalls: wire up preadv2 and pwritev2 syscallsAndre Przywara
These new syscalls are implemented as generic code, so enable them for architectures like arm64 which use the generic syscall table. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2016-04-23Merge branch 'locking-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking fixes from Ingo Molnar: "Misc fixes: pvqspinlocks: - an instrumentation fix futexes: - preempt-count vs pagefault_disable decouple corner case fix - futex requeue plist race window fix - futex UNLOCK_PI transaction fix for a corner case" * 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: asm-generic/futex: Re-enable preemption in futex_atomic_cmpxchg_inatomic() futex: Acknowledge a new waiter in counter before plist futex: Handle unlock_pi race gracefully locking/pvqspinlock: Fix division by zero in qstat_read()
2016-04-23perf/core: Add ::write_backward attribute to perf eventWang Nan
This patch introduces 'write_backward' bit to perf_event_attr, which controls the direction of a ring buffer. After set, the corresponding ring buffer is written from end to beginning. This feature is design to support reading from overwritable ring buffer. Ring buffer can be created by mapping a perf event fd. Kernel puts event records into ring buffer, user tooling like perf fetch them from address returned by mmap(). To prevent racing between kernel and tooling, they communicate to each other through 'head' and 'tail' pointers. Kernel maintains 'head' pointer, points it to the next free area (tail of the last record). Tooling maintains 'tail' pointer, points it to the tail of last consumed record (record has already been fetched). Kernel determines the available space in a ring buffer using these two pointers to avoid overwrite unfetched records. By mapping without 'PROT_WRITE', an overwritable ring buffer is created. Different from normal ring buffer, tooling is unable to maintain 'tail' pointer because writing is forbidden. Therefore, for this type of ring buffers, kernel overwrite old records unconditionally, works like flight recorder. This feature would be useful if reading from overwritable ring buffer were as easy as reading from normal ring buffer. However, there's an obscure problem. The following figure demonstrates a full overwritable ring buffer. In this figure, the 'head' pointer points to the end of last record, and a long record 'E' is pending. For a normal ring buffer, a 'tail' pointer would have pointed to position (X), so kernel knows there's no more space in the ring buffer. However, for an overwritable ring buffer, kernel ignore the 'tail' pointer. (X) head . | . V +------+-------+----------+------+---+ |A....A|B.....B|C........C|D....D| | +------+-------+----------+------+---+ Record 'A' is overwritten by event 'E': head | V +--+---+-------+----------+------+---+ |.E|..A|B.....B|C........C|D....D|E..| +--+---+-------+----------+------+---+ Now tooling decides to read from this ring buffer. However, none of these two natural positions, 'head' and the start of this ring buffer, are pointing to the head of a record. Even the full ring buffer can be accessed by tooling, it is unable to find a position to start decoding. The first attempt tries to solve this problem AFAIK can be found from [1]. It makes kernel to maintain 'tail' pointer: updates it when ring buffer is half full. However, this approach introduces overhead to fast path. Test result shows a 1% overhead [2]. In addition, this method utilizes no more tham 50% records. Another attempt can be found from [3], which allows putting the size of an event at the end of each record. This approach allows tooling to find records in a backward manner from 'head' pointer by reading size of a record from its tail. However, because of alignment requirement, it needs 8 bytes to record the size of a record, which is a huge waste. Its performance is also not good, because more data need to be written. This approach also introduces some extra branch instructions to fast path. 'write_backward' is a better solution to this problem. Following figure demonstrates the state of the overwritable ring buffer when 'write_backward' is set before overwriting: head | V +---+------+----------+-------+------+ | |D....D|C........C|B.....B|A....A| +---+------+----------+-------+------+ and after overwriting: head | V +---+------+----------+-------+---+--+ |..E|D....D|C........C|B.....B|A..|E.| +---+------+----------+-------+---+--+ In each situation, 'head' points to the beginning of the newest record. From this record, tooling can iterate over the full ring buffer and fetch records one by one. The only limitation that needs to be considered is back-to-back reading. Due to the non-deterministic of user programs, it is impossible to ensure the ring buffer keeps stable during reading. Consider an extreme situation: tooling is scheduled out after reading record 'D', then a burst of events come, eat up the whole ring buffer (one or multiple rounds). When the tooling process comes back, reading after 'D' is incorrect now. To prevent this problem, we need to find a way to ensure the ring buffer is stable during reading. ioctl(PERF_EVENT_IOC_PAUSE_OUTPUT) is suggested because its overhead is lower than ioctl(PERF_EVENT_IOC_ENABLE). By carefully verifying 'header' pointer, reader can avoid pausing the ring-buffer. For example: /* A union of all possible events */ union perf_event event; p = head = perf_mmap__read_head(); while (true) { /* copy header of next event */ fetch(&event.header, p, sizeof(event.header)); /* read 'head' pointer */ head = perf_mmap__read_head(); /* check overwritten: is the header good? */ if (!verify(sizeof(event.header), p, head)) break; /* copy the whole event */ fetch(&event, p, event.header.size); /* read 'head' pointer again */ head = perf_mmap__read_head(); /* is the whole event good? */ if (!verify(event.header.size, p, head)) break; p += event.header.size; } However, the overhead is high because: a) In-place decoding is not safe. Copying-verifying-decoding is required. b) Fetching 'head' pointer requires additional synchronization. (From Alexei Starovoitov: Even when this trick works, pause is needed for more than stability of reading. When we collect the events into overwrite buffer we're waiting for some other trigger (like all cpu utilization spike or just one cpu running and all others are idle) and when it happens the buffer has valuable info from the past. At this point new events are no longer interesting and buffer should be paused, events read and unpaused until next trigger comes.) This patch utilizes event's default overflow_handler introduced previously. perf_event_output_backward() is created as the default overflow handler for backward ring buffers. To avoid extra overhead to fast path, original perf_event_output() becomes __perf_event_output() and marked '__always_inline'. In theory, there's no extra overhead introduced to fast path. Performance testing: Calling 3000000 times of 'close(-1)', use gettimeofday() to check duration. Use 'perf record -o /dev/null -e raw_syscalls:*' to capture system calls. In ns. Testing environment: CPU : Intel(R) Core(TM) i7-4790 CPU @ 3.60GHz Kernel : v4.5.0 MEAN STDVAR BASE 800214.950 2853.083 PRE1 2253846.700 9997.014 PRE2 2257495.540 8516.293 POST 2250896.100 8933.921 Where 'BASE' is pure performance without capturing. 'PRE1' is test result of pure 'v4.5.0' kernel. 'PRE2' is test result before this patch. 'POST' is test result after this patch. See [4] for the detailed experimental setup. Considering the stdvar, this patch doesn't introduce performance overhead to the fast path. [1] http://lkml.iu.edu/hypermail/linux/kernel/1304.1/04584.html [2] http://lkml.iu.edu/hypermail/linux/kernel/1307.1/00535.html [3] http://lkml.iu.edu/hypermail/linux/kernel/1512.0/01265.html [4] http://lkml.kernel.org/g/56F89DCD.1040202@huawei.com Signed-off-by: Wang Nan <wangnan0@huawei.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Alexei Starovoitov <ast@kernel.org> Cc: <acme@kernel.org> Cc: <pi3orama@163.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: Zefan Li <lizefan@huawei.com> Link: http://lkml.kernel.org/r/1459865478-53413-1-git-send-email-wangnan0@huawei.com [ Fixed the changelog some more. ] Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-04-23Merge branch 'perf/urgent' into perf/core, to resolve conflictIngo Molnar
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-04-23lockdep: Fix lock_chain::base sizePeter Zijlstra
lock_chain::base is used to store an index into the chain_hlocks[] array, however that array contains more elements than can be indexed using the u16. Change the lock_chain structure to use a bitfield to encode the data it needs and add BUILD_BUG_ON() assertions to check the fields are wide enough. Also, for DEBUG_LOCKDEP, assert that we don't run out of elements of that array; as that would wreck the collision detectoring. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Alfredo Alvarez Fernandez <alfredoalvarezfernandez@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sedat Dilek <sedat.dilek@gmail.com> Cc: Theodore Ts'o <tytso@mit.edu> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160330093659.GS3408@twins.programming.kicks-ass.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-04-22Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linuxLinus Torvalds
Pull drm fixes from Dave Airlie: "i915, nouveau and amdgpu/radeon fixes in this: nouveau: Two fixes, one for a regression with dithering and one for a bug hit by the userspace drivers. i915: A few fixes, mostly things heading for stable, two important skylake GT3/4 hangs. radeon/amdgpu: Some audio, suspend/resume and some runtime PM fixes, along with two patches to harden the userptr ABI a bit" * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (24 commits) drm: Loongson-3 doesn't fully support wc memory drm/nouveau/gr/gf100: select a stream master to fixup tfb offset queries amdgpu/uvd: add uvd fw version for amdgpu drm/amdgpu: forbid mapping of userptr bo through radeon device file drm/radeon: forbid mapping of userptr bo through radeon device file drm/amdgpu: bump the afmt limit for CZ, ST, Polaris drm/amdgpu: use defines for CRTCs and AMFT blocks drm/dp/mst: Validate port in drm_dp_payload_send_msg() drm/nouveau/kms: fix setting of default values for dithering properties drm/radeon: print a message if ATPX dGPU power control is missing Revert "drm/radeon: disable runtime pm on PX laptops without dGPU power control" drm/amdgpu/acp: fix resume on CZ systems with AZ audio drm/radeon: add a quirk for a XFX R9 270X drm/radeon: print pci revision as well as pci ids on driver load drm/i915: Use fw_domains_put_with_fifo() on HSW drm/i915: Force ringbuffers to not be at offset 0 drm/i915: Adjust size of PIPE_CONTROL used for gen8 render seqno write drm/i915/skl: Fix spurious gpu hang with gt3/gt4 revs drm/i915/skl: Fix rc6 based gpu/system hang drm/i915/userptr: Hold mmref whilst calling get-user-pages ...
2016-04-22Merge tag 'sound-4.6-rc5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound Pull sound fixes from Takashi Iwai: "Again a relatively calm week without surprise: most of fixes are about HD-audio, including fixes for Cirrus codec regression and a race over regmap access. Although both change are slightly unintuitive, the risk of further breakage is quite low, I hope. Other than that, all the rest are trivial" * tag 'sound-4.6-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: ALSA: hda - Fix possible race on regmap bypass flip ALSA: pcxhr: Fix missing mutex unlock ALSA: hda - add PCI ID for Intel Broxton-T ALSA: hda - Keep powering up ADCs on Cirrus codecs ALSA: hda/realtek - Add ALC3234 headset mode for Optiplex 9020m ALSA - hda: hdmi check NULL pointer in hdmi_set_chmap ALSA: hda - Don't trust the reported actual power state
2016-04-22drm: Loongson-3 doesn't fully support wc memoryHuacai Chen
Signed-off-by: Huacai Chen <chenhc@lemote.com> Cc: stable@vger.kernel.org Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2016-04-21Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds
Pull networking fixes from David Miller: 1) Fix memory leak in iwlwifi, from Matti Gottlieb. 2) Add missing registration of netfilter arp_tables into initial namespace, from Florian Westphal. 3) Fix potential NULL deref in DecNET routing code. 4) Restrict NETLINK_URELEASE to truly bound sockets only, from Dmitry Ivanov. 5) Fix dst ref counting in VRF, from David Ahern. 6) Fix TSO segmenting limits in i40e driver, from Alexander Duyck. 7) Fix heap leak in PACKET_DIAG_MCLIST, from Mathias Krause. 8) Ravalidate IPV6 datagram socket cached routes properly, particularly with UDP, from Martin KaFai Lau. 9) Fix endian bug in RDS dp_ack_seq handling, from Qing Huang. 10) Fix stats typing in bcmgenet driver, from Eric Dumazet. 11) Openvswitch needs to orphan SKBs before ipv6 fragmentation handing, from Joe Stringer. 12) SPI device reference leak in spi_ks8895 PHY driver, from Mark Brown. 13) atl2 doesn't actually support scatter-gather, so don't advertise the feature. From Ben Hucthings. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (72 commits) openvswitch: use flow protocol when recalculating ipv6 checksums Driver: Vmxnet3: set CHECKSUM_UNNECESSARY for IPv6 packets atl2: Disable unimplemented scatter/gather feature net/mlx4_en: Split SW RX dropped counter per RX ring net/mlx4_core: Don't allow to VF change global pause settings net/mlx4_core: Avoid repeated calls to pci enable/disable net/mlx4_core: Implement pci_resume callback net: phy: spi_ks8895: Don't leak references to SPI devices net: ethernet: davinci_emac: Fix platform_data overwrite net: ethernet: davinci_emac: Fix Unbalanced pm_runtime_enable qede: Fix single MTU sized packet from firmware GRO flow qede: Fix setting Skb network header qede: Fix various memory allocation error flows for fastpath tcp: Merge tx_flags and tskey in tcp_shifted_skb tcp: Merge tx_flags and tskey in tcp_collapse_retrans drivers: net: cpsw: fix wrong regs access in cpsw_ndo_open tcp: Fix SOF_TIMESTAMPING_TX_ACK when handling dup acks openvswitch: Orphan skbs before IPv6 defrag Revert "Prevent NUll pointer dereference with two PHYs on cpsw" VSOCK: Only check error on skb_recv_datagram when skb is NULL ...
2016-04-21net/mlx4_core: Avoid repeated calls to pci enable/disableDaniel Jurgens
Maintain the PCI status and provide wrappers for enabling and disabling the PCI device. Performing the actions more than once without doing its opposite results in warning logs. This occurred when EEH hotplugged the device causing a warning for disabling an already disabled device. Fixes: 2ba5fbd62b25 ('net/mlx4_core: Handle AER flow properly') Signed-off-by: Daniel Jurgens <danielj@mellanox.com> Signed-off-by: Yishai Hadas <yishaih@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-21tcp: Merge tx_flags and tskey in tcp_shifted_skbMartin KaFai Lau
After receiving sacks, tcp_shifted_skb() will collapse skbs if possible. tx_flags and tskey also have to be merged. This patch reuses the tcp_skb_collapse_tstamp() to handle them. BPF Output Before: ~~~~~ <no-output-due-to-missing-tstamp-event> BPF Output After: ~~~~~ <...>-2024 [007] d.s. 88.644374: : ee_data:14599 Packetdrill Script: ~~~~~ +0 `sysctl -q -w net.ipv4.tcp_min_tso_segs=10` +0 `sysctl -q -w net.ipv4.tcp_no_metrics_save=1` +0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3 +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 +0 bind(3, ..., ...) = 0 +0 listen(3, 1) = 0 0.100 < S 0:0(0) win 32792 <mss 1460,sackOK,nop,nop,nop,wscale 7> 0.100 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 7> 0.200 < . 1:1(0) ack 1 win 257 0.200 accept(3, ..., ...) = 4 +0 setsockopt(4, SOL_TCP, TCP_NODELAY, [1], 4) = 0 0.200 write(4, ..., 1460) = 1460 +0 setsockopt(4, SOL_SOCKET, 37, [2688], 4) = 0 0.200 write(4, ..., 13140) = 13140 0.200 > P. 1:1461(1460) ack 1 0.200 > . 1461:8761(7300) ack 1 0.200 > P. 8761:14601(5840) ack 1 0.300 < . 1:1(0) ack 1 win 257 <sack 1461:14601,nop,nop> 0.300 > P. 1:1461(1460) ack 1 0.400 < . 1:1(0) ack 14601 win 257 0.400 close(4) = 0 0.400 > F. 14601:14601(0) ack 1 0.500 < F. 1:1(0) ack 14602 win 257 0.500 > . 14602:14602(0) ack 2 Signed-off-by: Martin KaFai Lau <kafai@fb.com> Cc: Eric Dumazet <edumazet@google.com> Cc: Neal Cardwell <ncardwell@google.com> Cc: Soheil Hassas Yeganeh <soheil@google.com> Cc: Willem de Bruijn <willemb@google.com> Cc: Yuchung Cheng <ycheng@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Tested-by: Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-21ALSA: hda - Fix possible race on regmap bypass flipTakashi Iwai
HD-audio driver uses regmap cache bypass feature for reading a raw value without the cache. But this is racy since both the cached and the uncached reads may occur concurrently. The former is done via the normal control API access while the latter comes from the proc file read. Even though the regmap itself has the protection against the concurrent accesses, the flag set/reset is done without the protection, so it may lead to inconsistent state of bypass flag that doesn't match with the current read and occasionally result in a kernel WARNING like: WARNING: CPU: 3 PID: 2731 at drivers/base/regmap/regcache.c:499 regcache_cache_only+0x78/0x93 One way to work around such a problem is to wrap with a mutex. But in this case, the solution is simpler: for the uncached read, we just skip the regmap and directly calls its accessor. The verb execution there is protected by itself, so basically it's safe to call individually. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=116171 Signed-off-by: Takashi Iwai <tiwai@suse.de>
2016-04-21asm-generic/futex: Re-enable preemption in futex_atomic_cmpxchg_inatomic()Romain Perier
The recent decoupling of pagefault disable and preempt disable added an explicit preempt_disable/enable() pair to the futex_atomic_cmpxchg_inatomic() implementation in asm-generic/futex.h. But it forgot to add preempt_enable() calls to the error handling code pathes, which results in a preemption count imbalance. This is observable on boot when the test for atomic_cmpxchg() is calling futex_atomic_cmpxchg_inatomic() on a NULL pointer. Add the missing preempt_enable() calls to the error handling code pathes. [ tglx: Massaged changelog ] Fixes: d9b9ff8c1889 ("sched/preempt, futex: Disable preemption in UP futex_atomic_cmpxchg_inatomic() explicitly") Signed-off-by: Romain Perier <romain.perier@free-electrons.com> Cc: linux-arch@vger.kernel.org Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/1460640963-690-1-git-send-email-romain.perier@free-electrons.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-04-20thermal: consistently use int for trip tempWei Ni
The commit 17e8351a7739 consistently use int for temperature, however it missed a few in trip temperature and thermal_core. In current codes, the trip->temperature used "unsigned long" and zone->temperature used"int", if the temperature is negative value, it will get wrong result when compare temperature with trip temperature. This patch can fix it. Signed-off-by: Wei Ni <wni@nvidia.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2016-04-19cls_cgroup: get sk_classid only from full socketsKonstantin Khlebnikov
skb->sk could point to timewait or request socket which has no sk_classid. Detected as "BUG: KASAN: slab-out-of-bounds in cls_cgroup_classify". Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-19Merge branch 'ptmx-cleanup'Linus Torvalds
Merge the ptmx internal interface cleanup branch. This doesn't change semantics, but it should be a sane basis for eventually getting the multi-instance devpts code into some sane shape where we can get rid of the kernel config option. Which we can hopefully get done next merge window.. * ptmx-cleanup: devpts: clean up interface to pty drivers
2016-04-18Merge tag 'pci-v4.6-fixes-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull PCI fixes from Bjorn Helgaas: "These are fixes for two issues: - The VPD parsing code we added for v4.6 keeps some devices from crashing, but also keeps cxgb4 from reading non-standard extra VPD data that is relies on. Hariprasad added a way for the driver to specify how much VPD is valid. - The i.MX6 active-low reset GPIO support we added in v4.5 caused regressions on some boards, so we're reverting that. VPD: Add pci_set_vpd_size() (Hariprasad Shenai) cxgb4: Set VPD size so we can read both VPD structures (Hariprasad Shenai) Freescale i.MX6 host bridge driver: Revert "PCI: imx6: Add support for active-low reset GPIO" (Fabio Estevam)" * tag 'pci-v4.6-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: cxgb4: Set VPD size so we can read both VPD structures PCI: Add pci_set_vpd_size() to set VPD size Revert "PCI: imx6: Add support for active-low reset GPIO"
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