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2018-02-03libnvdimm, namespace: remove redundant initialization of 'nd_mapping'Colin Ian King1-1/+1
Pointer nd_mapping is being initialized to a value that is never read, instead it is being updated to a new value in all the cases where it is being read afterwards, hence the initialization is redundant and can be removed. Cleans up clang warning: drivers/nvdimm/namespace_devs.c:2411:21: warning: Value stored to 'nd_mapping' during its initialization is never rea Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
2018-02-02acpi, nfit: fix register dimm error handlingToshi Kani1-0/+3
A NULL pointer reference kernel bug was observed when acpi_nfit_add_dimm() called in acpi_nfit_register_dimms() failed. This error path does not set nfit_mem->nvdimm, but the 2nd list_for_each_entry() loop in the function assumes it's always set. Add a check to nfit_mem->nvdimm. Cc: <stable@vger.kernel.org> Fixes: ba9c8dd3c222 ("acpi, nfit: add dimm device notification support") Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2018-02-01libnvdimm, namespace: make min namespace size 4KDan Williams1-1/+1
The arbitrary 4MB minimum namespace size turns out to be too large for some environments. Quoting Cheng-mean Liu: In the case of emulated NVDIMM devices in the VM environment, there are scenarios that NVDIMM device with much smaller sizes are desired, for example, we might use a single enumerated NVDIMM DAX device for representing each container layer, which in some cases could be just a few KBs size. PAGE_SIZE is the minimum where we can still support DAX of at least a single page. Cc: Matthew Wilcox <willy@infradead.org> Reported-by: Cheng-mean Liu <soccerl@microsoft.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2018-02-01tools/testing/nvdimm: force nfit_test to depend on instrumented modulesDan Williams7-0/+63
The libnvdimm unit tests will fail when they are run against the production / in-tree version of libnvdimm.ko or nfit.ko due to symbols not being mocked per nfit_test's expectation. For example, nfit_test expects acpi_evaluate_dsm() to be replaced by __wrap_acpi_evaluate_dsm() to test how acpi_nfit_ctl() responds to different stimuli. Create a test-only symbol name that nfit_test links against to cause module load failures when the wrong module is present. For example, with this change, attempts to use the wrong module will report: nfit_test: Unknown symbol libnvdimm_test (err 0) Reported-by: Dave Jiang <dave.jiang@intel.com> Reported-by: Vishal Verma <vishal.l.verma@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2018-02-01libnvdimm/nfit_test: adding support for unit testing enable LSS statusDave Jiang2-0/+40
Adding support code to simulate the enabling of LSS status in support of the Intel DSM v1.6 Function Index 10: Enable Latch System Shutdown Status. This is only for testing of libndctl support for LSS enable. The actual functionality requires a reboot and therefore is not simulated. The enable value is not recorded in nfit_test since there's no DSM to actually query the current status of the LSS enable. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Vishal Verma <vishal.l.verma@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2018-02-01libnvdimm/nfit_test: add firmware download emulationDave Jiang2-28/+360
Adding support in nfit_test for DSM v1.6 firmware update sequence. The test will simulate the flashing of firmware to the DIMM. A bogus version string will be returned as the test has no idea how to parse the firmware binary. Any bogus binary can be used to "update" as the actual binary is not copied into the kernel. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Vishal Verma <vishal.l.verma@intel.com> [ vishal: also move smart calls into the nd_cmd_call block ] Signed-off-by: Vishal Verma <vishal.l.verma@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2018-01-23device-dax: Fix trailing semicolonLuis de Bethencourt1-1/+1
The trailing semicolon is an empty statement that does no operation. Removing it since it doesn't do anything. Signed-off-by: Luis de Bethencourt <luisbg@kernel.org> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2018-01-19libnvdimm, btt: fix uninitialized err_lockJeff Moyer1-1/+1
When a sector mode namespace is initially created, the arena's err_lock is not initialized. If, on the other hand, the namespace already exists, the mutex is initialized. To fix the issue, I moved the mutex initialization into the arena_alloc, which is called by both discover_arenas and create_arenas. This was discovered on an older kernel where mutex_trylock checks the count to determine whether the lock is held. Because the data structure is kzalloc-d, that count was 0 (held), and I/O to the device would hang forever waiting for the lock to be released (see btt_write_pg, for example). Current kernels have a different mutex implementation that checks for a non-null owner, and so this doesn't show up as a problem. If that lock were ever contended, it might cause issues, but you'd have to be really unlucky, I think. Signed-off-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2017-12-04tools/testing/nvdimm: smart alarm/threshold controlDan Williams2-44/+122
Allow the smart_threshold values to be changed via the 'set smart threshold command' and trigger notifications when the thresholds are met. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2017-12-04nfit, libnvdimm: deprecate the generic SMART ioctlDan Williams4-71/+84
The kernel's ND_IOCTL_SMART_THRESHOLD command is based on a payload definition that has become broken / out-of-sync with recent versions of the NVDIMM_FAMILY_INTEL definition. Deprecate the use of the ND_IOCTL_SMART_THRESHOLD command in favor of the ND_CMD_CALL approach taken by NVDIMM_FAMILY_{HPE,MSFT}, where we can manage the per-vendor variance in userspace. In a couple years, when the new scheme is widely deployed in userspace packages, the ND_IOCTL_SMART_THRESHOLD support can be removed. For now we prevent new binaries from compiling against the kernel header definitions, but kernel still compatible with old binaries. The libndctl.h [1] header is now the authoritative interface definition for NVDIMM SMART. [1]: https://github.com/pmem/ndctl Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2017-12-03Linux 4.15-rc2Linus Torvalds1-1/+1
2017-12-03Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-armLinus Torvalds1-2/+2
Pull ARM fix from Russell King: "Just one fix this time around, for the late commit in the merge window that triggered a problem with qemu. Qemu is apparently also going to receive a fix for the discovered issue" * 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm: ARM: avoid faulting on qemu
2017-12-03Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linuxLinus Torvalds3-1/+23
Pull i2c fixes from Wolfram Sang: "Here are two bugfixes for I2C, fixing a memleak in the core and irq allocation for i801. Also three bugfixes for the at24 eeprom driver which Bartosz collected while taking over maintainership for this driver" * 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: eeprom: at24: check at24_read/write arguments eeprom: at24: fix reading from 24MAC402/24MAC602 eeprom: at24: correctly set the size for at24mac402 i2c: i2c-boardinfo: fix memory leaks on devinfo i2c: i801: Fix Failed to allocate irq -2147483648 error
2017-12-03Merge tag 'hwmon-for-linus-v4.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-stagingLinus Torvalds4-10/+37
Pull hwmon fixes from Guenter Roeck: "Fixes: - Drop reference to obsolete maintainer tree - Fix overflow bug in pmbus driver - Fix SMBUS timeout problem in jc42 driver For the SMBUS timeout handling, we had a brief discussion if this should be considered a bug fix or a feature. Peter says "it fixes real problems where the application misbehave due to faulty content when reading from an eeprom", and he needs the patch in his company's v4.14 images. This is good enough for me and warrants backport to stable kernels" * tag 'hwmon-for-linus-v4.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: hwmon: (jc42) optionally try to disable the SMBUS timeout hwmon: (pmbus) Use 64bit math for DIRECT format values hwmon: Drop reference to Jean's tree
2017-12-03Merge tag 'at24-4.15-fixes-for-wolfram' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux into i2c/for-currentWolfram Sang1-1/+18
Please consider pulling the following fixes for v4.15. While it doesn't fix any regression introduced in the v4.15 merge window, we have a feature in at24 since linux v4.8 - reading the mac address block from at24mac series - which turned out to be not working. This pull request contains changes that fix it together with a patch that hardens the read and write argument sanitization with out-of-bounds checks that were missing.
2017-12-01Merge tag 'nfs-for-4.15-2' of git://git.linux-nfs.org/projects/anna/linux-nfsLinus Torvalds3-2/+9
Pull NFS client fixes from Anna Schumaker: "These patches fix a problem with compiling using an old version of gcc, and also fix up error handling in the SUNRPC layer. - NFSv4: Ensure gcc 4.4.4 can compile initialiser for "invalid_stateid" - SUNRPC: Allow connect to return EHOSTUNREACH - SUNRPC: Handle ENETDOWN errors" * tag 'nfs-for-4.15-2' of git://git.linux-nfs.org/projects/anna/linux-nfs: SUNRPC: Handle ENETDOWN errors SUNRPC: Allow connect to return EHOSTUNREACH NFSv4: Ensure gcc 4.4.4 can compile initialiser for "invalid_stateid"
2017-12-01Merge tag 'xfs-4.15-fixes-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linuxLinus Torvalds13-61/+190
Pull xfs fixes from Darrick Wong: "Here are some bug fixes for 4.15-rc2. - fix memory leaks that appeared after removing ifork inline data buffer - recover deferred rmap update log items in correct order - fix memory leaks when buffer construction fails - fix memory leaks when bmbt is corrupt - fix some uninitialized variables and math problems in the quota scrubber - add some omitted attribution tags on the log replay commit - fix some UBSAN complaints about integer overflows with large sparse files - implement an effective inode mode check in online fsck - fix log's inability to retry quota item writeout due to transient errors" * tag 'xfs-4.15-fixes-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: xfs: Properly retry failed dquot items in case of error during buffer writeback xfs: scrub inode mode properly xfs: remove unused parameter from xfs_writepage_map xfs: ubsan fixes xfs: calculate correct offset in xfs_scrub_quota_item xfs: fix uninitialized variable in xfs_scrub_quota xfs: fix leaks on corruption errors in xfs_bmap.c xfs: fortify xfs_alloc_buftarg error handling xfs: log recovery should replay deferred ops in order xfs: always free inline data before resetting inode fork during ifree
2017-12-01Merge tag 'riscv-for-linus-4.15-rc2_cleanups' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/linuxLinus Torvalds40-146/+498
Pull RISC-V cleanups and ABI fixes from Palmer Dabbelt: "This contains a handful of small cleanups that are a result of feedback that didn't make it into our original patch set, either because the feedback hadn't been given yet, I missed the original emails, or we weren't ready to submit the changes yet. I've been maintaining the various cleanup patch sets I have as their own branches, which I then merged together and signed. Each merge commit has a short summary of the changes, and each branch is based on your latest tag (4.15-rc1, in this case). If this isn't the right way to do this then feel free to suggest something else, but it seems sane to me. Here's a short summary of the changes, roughly in order of how interesting they are. - libgcc.h has been moved from include/lib, where it's the only member, to include/linux. This is meant to avoid tab completion conflicts. - VDSO entries for clock_get/gettimeofday/getcpu have been added. These are simple syscalls now, but we want to let glibc use them from the start so we can make them faster later. - A VDSO entry for instruction cache flushing has been added so userspace can flush the instruction cache. - The VDSO symbol versions for __vdso_cmpxchg{32,64} have been removed, as those VDSO entries don't actually exist. - __io_writes has been corrected to respect the given type. - A new READ_ONCE in arch_spin_is_locked(). - __test_and_op_bit_ord() is now actually ordered. - Various small fixes throughout the tree to enable allmodconfig to build cleanly. - Removal of some dead code in our atomic support headers. - Improvements to various comments in our atomic support headers" * tag 'riscv-for-linus-4.15-rc2_cleanups' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/linux: (23 commits) RISC-V: __io_writes should respect the length argument move libgcc.h to include/linux RISC-V: Clean up an unused include RISC-V: Allow userspace to flush the instruction cache RISC-V: Flush I$ when making a dirty page executable RISC-V: Add missing include RISC-V: Use define for get_cycles like other architectures RISC-V: Provide stub of setup_profiling_timer() RISC-V: Export some expected symbols for modules RISC-V: move empty_zero_page definition to C and export it RISC-V: io.h: type fixes for warnings RISC-V: use RISCV_{INT,SHORT} instead of {INT,SHORT} for asm macros RISC-V: use generic serial.h RISC-V: remove spin_unlock_wait() RISC-V: `sfence.vma` orderes the instruction cache RISC-V: Add READ_ONCE in arch_spin_is_locked() RISC-V: __test_and_op_bit_ord should be strongly ordered RISC-V: Remove smb_mb__{before,after}_spinlock() RISC-V: Remove __smp_bp__{before,after}_atomic RISC-V: Comment on why {,cmp}xchg is ordered how it is ...
2017-12-01Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linuxLinus Torvalds13-93/+92
Pull arm64 fixes from Will Deacon: "The critical one here is a fix for fpsimd register corruption across signals which was introduced by the SVE support code (the register files overlap), but the others are worth having as well. Summary: - Fix FP register corruption when SVE is not available or in use - Fix out-of-tree module build failure when CONFIG_ARM64_MODULE_PLTS=y - Missing 'const' generating errors with LTO builds - Remove unsupported events from Cortex-A73 PMU description - Removal of stale and incorrect comments" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: context: Fix comments and remove pointless smp_wmb() arm64: cpu_ops: Add missing 'const' qualifiers arm64: perf: remove unsupported events for Cortex-A73 arm64: fpsimd: Fix failure to restore FPSIMD state after signals arm64: pgd: Mark pgd_cache as __ro_after_init arm64: ftrace: emit ftrace-mod.o contents through code arm64: module-plts: factor out PLT generation code for ftrace arm64: mm: cleanup stale AIVIVT references
2017-12-01RISC-V: Fixes for clean allmodconfig buildPalmer Dabbelt12-21/+39
Olaf said: Here's a short series of patches that produces a working allmodconfig. Would be nice to see them go in so we can add build coverage. I've dropped patches 8 and 10 from the original set: * [PATCH 08/10] (RISC-V: Set __ARCH_WANT_RENAMEAT to pick up generic version) has a better fix that I've sent out for review, we don't want renameat. * [PATCH 10/10] (input: joystick: riscv has get_cycles) has already been taken into Dmitry Torokhov's tree.
2017-12-01move libgcc.h to include/linuxPalmer Dabbelt7-6/+6
2017-12-01RISC-V: __io_writes should respect the length argumentPalmer Dabbelt1-1/+1
2017-12-01RISC-V: User-Visible ChangesPalmer Dabbelt19-34/+392
This merge contains the user-visible, ABI-breaking changes that we want to make sure we have in Linux before our first release. Highlights include: * VDSO entries for clock_get/gettimeofday/getcpu have been added. These are simple syscalls now, but we want to let glibc use them from the start so we can make them faster later. * A VDSO entry for instruction cache flushing has been added so userspace can flush the instruction cache. * The VDSO symbol versions for __vdso_cmpxchg{32,64} have been removed, as those VDSO entries don't actually exist. Conflicts: arch/riscv/include/asm/tlbflush.h
2017-12-01RISC-V Atomic CleanupsPalmer Dabbelt5-84/+60
This patch set is the result of some feedback that filtered through after our original patch set was reviewed, some of which was the result of me missing some email. It contains: * A new READ_ONCE in arch_spin_is_locked() * __test_and_op_bit_ord() is now actually ordered * Improvements to various comments * Removal of some dead code
2017-12-01RISC-V: __io_writes should respect the length argumentPalmer Dabbelt1-1/+1
Whoops -- I must have just been being an idiot again. Thanks to Segher for finding the bug :). CC: Segher Boessenkool <segher@kernel.crashing.org> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2017-12-01move libgcc.h to include/linuxChristoph Hellwig7-6/+6
Introducing a new include/lib directory just for this file totally messes up tab completion for include/linux, which is highly annoying. Move it to include/linux where we have headers for all kinds of other lib/ code as well. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2017-12-01Merge tag 'powerpc-4.15-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linuxLinus Torvalds4-8/+33
Pull powerpc fixes from Michael Ellerman: "Two fixes for nasty kexec/kdump crashes in certain configurations. A couple of minor fixes for the new TIDR code. A fix for an oops in a CXL error handling path. Thanks to: Andrew Donnellan, Christophe Lombard, David Gibson, Mahesh Salgaonkar, Vaibhav Jain" * tag 'powerpc-4.15-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc: Do not assign thread.tidr if already assigned powerpc: Avoid signed to unsigned conversion in set_thread_tidr() powerpc/kexec: Fix kexec/kdump in P9 guest kernels powerpc/powernv: Fix kexec crashes caused by tlbie tracing cxl: Check if vphb exists before iterating over AFU devices
2017-12-01Merge tag 'afs-fixes-20171201' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fsLinus Torvalds3-10/+27
Pull AFS fixes from David Howells: "Two fix patches for the AFS filesystem: - Fix the refcounting on permit caching. - AFS inode (afs_vnode) fields need resetting after allocation because they're only initialised when slab pages are obtained from the page allocator" * tag 'afs-fixes-20171201' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs: afs: Properly reset afs_vnode (inode) fields afs: Fix permit refcounting
2017-12-01Merge tag 'mmc-v4.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmcLinus Torvalds7-21/+98
Pull MMC fixes from Ulf Hansson: "MMC core: - Ensure that debugfs files are removed properly - Fix missing blk_put_request() - Deal with errors from blk_get_request() - Rewind mmc bus suspend operations at failures - Prepend '0x' to ocr and pre_eol_info in sysfs to identify as hex MMC host: - sdhci-msm: Make it optional to wait for signal level changes - sdhci: Avoid swiotlb buffer being full" * tag 'mmc-v4.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: mmc: core: prepend 0x to OCR entry in sysfs mmc: core: prepend 0x to pre_eol_info entry in sysfs mmc: sdhci: Avoid swiotlb buffer being full mmc: sdhci-msm: Optionally wait for signal level changes mmc: block: Ensure that debugfs files are removed mmc: core: Do not leave the block driver in a suspended state mmc: block: Check return value of blk_get_request() mmc: block: Fix missing blk_put_request()
2017-12-01Merge tag 'drm-fixes-for-v4.15-rc2' of git://people.freedesktop.org/~airlied/linuxLinus Torvalds67-483/+814
Pull drm fixes and cleanups from Dave Airlie: "The main thing are a bunch of fixes for the new amd display code, a bunch of smatch fixes. core: - Atomic helper regression fix. - Deferred fbdev fallout regression fix. amdgpu: - New display code (dc) dpms, suspend/resume and smatch fixes, along with some others - Some regression fixes for amdkfd/radeon. - Fix a ttm regression for swiotlb disabled bridge: - A bunch of fixes for the tc358767 bridge mali-dp + hdlcd: - some fixes and internal API catchups. imx-drm: -regression fix in atomic code. omapdrm: - platform detection regression fixes" * tag 'drm-fixes-for-v4.15-rc2' of git://people.freedesktop.org/~airlied/linux: (76 commits) drm/imx: always call wait_for_flip_done in commit_tail omapdrm: hdmi4_cec: signedness bug in hdmi4_cec_init() drm: omapdrm: Fix DPI on platforms using the DSI VDDS omapdrm: hdmi4: Correct the SoC revision matching drm/omap: displays: panel-dpi: add backlight dependency drm/omap: Fix error handling path in 'omap_dmm_probe()' drm/i915: Disable THP until we have a GPU read BW W/A drm/bridge: tc358767: fix 1-lane behavior drm/bridge: tc358767: fix AUXDATAn registers access drm/bridge: tc358767: fix timing calculations drm/bridge: tc358767: fix DP0_MISC register set drm/bridge: tc358767: filter out too high modes drm/bridge: tc358767: do no fail on hi-res displays drm/bridge: Fix lvds-encoder since the panel_bridge rework. drm/bridge: synopsys/dw-hdmi: Enable cec clock drm/bridge: adv7511/33: Fix adv7511_cec_init() failure handling drm/radeon: remove init of CIK VMIDs 8-16 for amdkfd drm/ttm: fix populate_and_map() functions once more drm/fb_helper: Disable all crtc's when initial setup fails. drm/atomic: make drm_atomic_helper_wait_for_vblanks more agressive ...
2017-12-01Merge branch 'for-linus' of git://git.kernel.dk/linux-blockLinus Torvalds22-211/+291
Pull block fixes from Jens Axboe: "A selection of fixes/changes that should make it into this series. This contains: - NVMe, two merges, containing: - pci-e, rdma, and fc fixes - Device quirks - Fix for a badblocks leak in null_blk - bcache fix from Rui Hua for a race condition regression where -EINTR was returned to upper layers that didn't expect it. - Regression fix for blktrace for a bug introduced in this series. - blktrace cleanup for cgroup id. - bdi registration error handling. - Small series with cleanups for blk-wbt. - Various little fixes for typos and the like. Nothing earth shattering, most important are the NVMe and bcache fixes" * 'for-linus' of git://git.kernel.dk/linux-block: (34 commits) nvme-pci: fix NULL pointer dereference in nvme_free_host_mem() nvme-rdma: fix memory leak during queue allocation blktrace: fix trace mutex deadlock nvme-rdma: Use mr pool nvme-rdma: Check remotely invalidated rkey matches our expected rkey nvme-rdma: wait for local invalidation before completing a request nvme-rdma: don't complete requests before a send work request has completed nvme-rdma: don't suppress send completions bcache: check return value of register_shrinker bcache: recover data from backing when data is clean bcache: Fix building error on MIPS bcache: add a comment in journal bucket reading nvme-fc: don't use bit masks for set/test_bit() numbers blk-wbt: fix comments typo blk-wbt: move wbt_clear_stat to common place in wbt_done blk-sysfs: remove NULL pointer checking in queue_wb_lat_store blk-wbt: remove duplicated setting in wbt_init nvme-pci: add quirk for delay before CHK RDY for WDC SN200 block: remove useless assignment in bio_split null_blk: fix dev->badblocks leak ...
2017-12-01arm64: context: Fix comments and remove pointless smp_wmb()Will Deacon1-11/+12
The comments in the ASID allocator incorrectly hint at an MP-style idiom using the asid_generation and the active_asids array. In fact, the synchronisation is achieved using a combination of an xchg operation and a spinlock, so update the comments and remove the pointless smp_wmb(). Cc: James Morse <james.morse@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-12-01arm64: cpu_ops: Add missing 'const' qualifiersYury Norov1-3/+3
Building the kernel with an LTO-enabled GCC spits out the following "const" warning for the cpu_ops code: mm/percpu.c:2168:20: error: pcpu_fc_names causes a section type conflict with dt_supported_cpu_ops const char * const pcpu_fc_names[PCPU_FC_NR] __initconst = { ^ arch/arm64/kernel/cpu_ops.c:34:37: note: ‘dt_supported_cpu_ops’ was declared here static const struct cpu_operations *dt_supported_cpu_ops[] __initconst = { Fix it by adding missed const qualifiers. Signed-off-by: Yury Norov <ynorov@caviumnetworks.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-12-01arm64: perf: remove unsupported events for Cortex-A73Xu YiPing1-6/+0
bus access read/write events are not supported in A73, based on the Cortex-A73 TRM r0p2, section 11.9 Events (pages 11-457 to 11-460). Fixes: 5561b6c5e981 "arm64: perf: add support for Cortex-A73" Acked-by: Julien Thierry <julien.thierry@arm.com> Signed-off-by: Xu YiPing <xuyiping@hisilicon.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-12-01arm64: fpsimd: Fix failure to restore FPSIMD state after signalsDave Martin1-3/+3
The fpsimd_update_current_state() function is responsible for loading the FPSIMD state from the user signal frame into the current task during sigreturn. When implementing support for SVE, conditional code was added to this function in order to handle the case where SVE state need to be loaded for the task and merged with the FPSIMD data from the signal frame; however, the FPSIMD-only case was unintentionally dropped. As a result of this, sigreturn does not currently restore the FPSIMD state of the task, except in the case where the system supports SVE and the signal frame contains SVE state in addition to FPSIMD state. This patch fixes this bug by making the copy-in of the FPSIMD data from the signal frame to thread_struct unconditional. This remains a performance regression from v4.14, since the FPSIMD state is now copied into thread_struct and then loaded back, instead of _only_ being loaded into the CPU FPSIMD registers. However, it is essential to call task_fpsimd_load() here anyway in order to ensure that the SVE enable bit in CPACR_EL1 is set correctly before returning to userspace. This could use some refactoring, but since sigreturn is not a fast path I have kept this patch as a pure fix and left the refactoring for later. Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Fixes: 8cd969d28fd2 ("arm64/sve: Signal handling support") Reported-by: Alex Bennée <alex.bennee@linaro.org> Tested-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Dave Martin <Dave.Martin@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-12-01arm64: pgd: Mark pgd_cache as __ro_after_initJinbum Park1-1/+1
pgd_cache is setup once while init stage and never changed after that, so it is good candidate for __ro_after_init Signed-off-by: Jinbum Park <jinb.park7@gmail.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-12-01arm64: ftrace: emit ftrace-mod.o contents through codeArd Biesheuvel7-31/+22
When building the arm64 kernel with both CONFIG_ARM64_MODULE_PLTS and CONFIG_DYNAMIC_FTRACE enabled, the ftrace-mod.o object file is built with the kernel and contains a trampoline that is linked into each module, so that modules can be loaded far away from the kernel and still reach the ftrace entry point in the core kernel with an ordinary relative branch, as is emitted by the compiler instrumentation code dynamic ftrace relies on. In order to be able to build out of tree modules, this object file needs to be included into the linux-headers or linux-devel packages, which is undesirable, as it makes arm64 a special case (although a precedent does exist for 32-bit PPC). Given that the trampoline essentially consists of a PLT entry, let's not bother with a source or object file for it, and simply patch it in whenever the trampoline is being populated, using the existing PLT support routines. Cc: <stable@vger.kernel.org> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-12-01arm64: module-plts: factor out PLT generation code for ftraceArd Biesheuvel2-36/+46
To allow the ftrace trampoline code to reuse the PLT entry routines, factor it out and move it into asm/module.h. Cc: <stable@vger.kernel.org> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-12-01afs: Properly reset afs_vnode (inode) fieldsDavid Howells2-2/+17
When an AFS inode is allocated by afs_alloc_inode(), the allocated afs_vnode struct isn't necessarily reset from the last time it was used as an inode because the slab constructor is only invoked once when the memory is obtained from the page allocator. This means that information can leak from one inode to the next because we're not calling kmem_cache_zalloc(). Some of the information isn't reset, in particular the permit cache pointer. Bring the clearances up to date. Signed-off-by: David Howells <dhowells@redhat.com> Tested-by: Marc Dionne <marc.dionne@auristor.com>
2017-12-01afs: Fix permit refcountingDavid Howells1-8/+10
Fix four refcount bugs in afs_cache_permit(): (1) When checking the result of the kzalloc(), we can't just return, but must put 'permits'. (2) We shouldn't put permits immediately after hashing a new permit as we need to keep the pointer stable so that we can check to see if vnode->permit_cache has changed before we decide whether to assign to it. (3) 'permits' is being put twice. (4) We need to put either the replacement or the thing replaced after the assignment to vnode->permit_cache. Without this, lots of the following are seen: Kernel BUG at ffffffffa039857b [verbose debug info unavailable] ------------[ cut here ]------------ Kernel BUG at ffffffffa039858a [verbose debug info unavailable] ------------[ cut here ]------------ The addresses are in the .text..refcount section of the kafs.ko module. Following the relocation records for the __ex_table section shows one to be due to the decrement in afs_put_permits() and the other to be key_get() in afs_cache_permit(). Occasionally, the following is seen: refcount_t overflow at afs_cache_permit+0x57d/0x5c0 [kafs] in cc1[562], uid/euid: 0/0 WARNING: CPU: 0 PID: 562 at kernel/panic.c:657 refcount_error_report+0x9c/0xac ... Reported-by: Marc Dionne <marc.dionne@auristor.com> Signed-off-by: David Howells <dhowells@redhat.com> Tested-by: Marc Dionne <marc.dionne@auristor.com>
2017-11-30Merge tag 'apparmor-pr-2017-11-30' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmorLinus Torvalds1-5/+7
Pull apparmor bugfix from John Johansen: "Fix oops in audit_signal_cb hook marked for stable" * tag 'apparmor-pr-2017-11-30' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor: apparmor: fix oops in audit_signal_cb hook
2017-11-30Merge tag 'acpi-4.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pmLinus Torvalds6-24/+73
Pull ACPI fixes from Rafael Wysocki: "These fix a regression related to the ACPI EC handling during system suspend/resume on some platforms and prevent modalias from being exposed to user space for ACPI device object with "not functional and not present" status. Specifics: - Fix an ACPI EC driver regression (from the 4.9 cycle) causing the driver's power management operations to be omitted during system suspend/resume on platforms where the EC instance from the ECDT table is used instead of the one from the DSDT (Lv Zheng). - Prevent modalias from being exposed to user space for ACPI device objects with _STA returning 0 (not present and not functional) to prevent driver modules from being loaded automatically for hardware that is not actually present on some platforms (Hans de Goede)" * tag 'acpi-4.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: ACPI / EC: Fix regression related to PM ops support in ECDT device ACPI / bus: Leave modalias empty for devices which are not present
2017-11-30Merge tag 'pm-4.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pmLinus Torvalds4-4/+13
Pull power management fixes from Rafael Wysocki: - add missing module information to the Mediatek cpufreq driver module (Jesse Chan) - fix config dependencies for the Loongson cpufreq driver (James Hogan) - fix two issues related to CPU offline in the cpupower utility (Abhishek Goel). * tag 'pm-4.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: cpufreq: mediatek: add missing MODULE_DESCRIPTION/AUTHOR/LICENSE cpufreq: Add Loongson machine dependencies cpupower : Fix cpupower working when cpu0 is offline cpupowerutils: bench - Fix cpu online check
2017-11-30Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fsLinus Torvalds2-8/+15
Pull quota & reiserfs changes from Jan Kara: - two error checking improvements for quota - remove bogus i_version increase for reiserfs * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: quota: Check for register_shrinker() failure. quota: propagate error from __dquot_initialize reiserfs: remove unneeded i_version bump
2017-12-01Merge branch 'drm-fixes-4.15' of git://people.freedesktop.org/~agd5f/linux into drm-fixesDave Airlie30-230/+404
Fixes for 4.15. Highlights: - DC fixes for S3, gamma, audio, pageflipping, etc. - fix a regression in radeon from kfd removal - fix a ttm regression with swiotlb disabled - misc other fixes * 'drm-fixes-4.15' of git://people.freedesktop.org/~agd5f/linux: (36 commits) drm/radeon: remove init of CIK VMIDs 8-16 for amdkfd drm/ttm: fix populate_and_map() functions once more drm/amd/display: USB-C / thunderbolt dock specific workaround drm/amd/display: Switch to drm_atomic_helper_wait_for_flip_done drm/amd/display: fix gamma setting drm/amd/display: Do not put drm_atomic_state on resume drm/amd/display: Fix couple more inconsistent NULL checks in dc_resource drm/amd/display: Fix potential NULL and mem leak in create_links drm/amd/display: Fix hubp check in set_cursor_position drm/amd/display: Fix use before NULL check in validate_timing drm/amd/display: Bunch of smatch error and warning fixes in DC drm/amd/display: Fix amdgpu_dm bugs found by smatch drm/amd/display: try to find matching audio inst for enc inst first drm/amd/display: fix seq issue: turn on clock before programming afmt. drm/amd/display: fix memory leaks on error exit return drm/amd/display: check plane state before validating fbc drm/amd/display: Do DC mode-change check when adding CRTCs drm/amd/display: Revert noisy assert messages drm/amd/display: fix split viewport rounding error drm/amd/display: Check aux channel before MST resume ...
2017-12-01Merge branch 'for-upstream/mali-dp' of git://linux-arm.org/linux-ld into drm-fixesDave Airlie5-83/+99
mali-dp interface cleanups. * 'for-upstream/mali-dp' of git://linux-arm.org/linux-ld: drm: mali-dp: Disable planes when their CRTC gets disabled. drm: mali-dp: Separate static internal data into a read-only structure. drm/arm: Replace instances of drm_dev_unref with drm_dev_put. drm: mali-dp: switch to drm_*_get(), drm_*_put() helpers
2017-12-01Merge tag 'drm-amdkfd-fixes-2017-11-26' of git://people.freedesktop.org/~gabbayo/linux into drm-fixesDave Airlie5-27/+67
This is amdkfd pull request for -rc2. It contains three small fixes to the CIK SDMA code, compilation error fix in kfd_ioctl.h and fix to accessing a pointer after it was released. * tag 'drm-amdkfd-fixes-2017-11-26' of git://people.freedesktop.org/~gabbayo/linux: uapi: fix linux/kfd_ioctl.h userspace compilation errors drm/amdkfd: fix amdkfd use-after-free GP fault drm/amdkfd: Fix SDMA oversubsription handling drm/amdkfd: Fix SDMA ring buffer size calculation drm/amdgpu: Fix SDMA load/unload sequence on HWS disabled mode
2017-12-01Merge branch 'for-upstream/hdlcd' of git://linux-arm.org/linux-ld into drm-fixesDave Airlie2-5/+7
3 hdlcd fixes/cleanups * 'for-upstream/hdlcd' of git://linux-arm.org/linux-ld: drm/arm: Replace instances of drm_dev_unref with drm_dev_put. drm: Fix checkpatch issue: "WARNING: braces {} are not necessary for single statement blocks." drm: hdlcd: Update PM code to save/restore console.
2017-12-01Merge tag 'imx-drm-fixes-2017-11-30' of git://git.pengutronix.de/git/pza/linux into drm-fixesDave Airlie1-2/+9
drm/imx: fix commit_tail for new drm_atomic_helper_setup_commit Since commit 080de2e5be2d ("drm/atomic: Check for busy planes/connectors before setting the commit"), drm_atomic_helper_setup_commit expects that blocking commits have completed flipping before the commit_tail returns. Add the missing wait_for_flip_done to commit_tail to ensure this. * tag 'imx-drm-fixes-2017-11-30' of git://git.pengutronix.de/git/pza/linux: drm/imx: always call wait_for_flip_done in commit_tail
2017-12-01Merge tag 'drm-intel-fixes-2017-11-30' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixesDave Airlie10-58/+56
- Disable transparent huge pages for now until we have a W/A - Building fix when CONFIG_BACKLIGHT_CLASS_DEVICE is not selected - GMBUS communication robustness - Fbdev hotplug handling fix gvt-fixes-2017-11-28 - regression fix for sane request alloc (Fred) - locking fix (Changbin) - fix invalid addr mask (Xiong) - compression regression fix (Weinan) - fix default pipe enable for virtual display (Xiaolin) * tag 'drm-intel-fixes-2017-11-30' of git://anongit.freedesktop.org/drm/drm-intel: drm/i915: Disable THP until we have a GPU read BW W/A drm/i915/gvt: Correct ADDR_4K/2M/1G_MASK definition drm/i915/gvt: enabled pipe A default on creating vgpu drm/i915/gvt: Move request alloc to dispatch_workload path only drm/i915/gvt: remove skl_misc_ctl_write handler drm/i915/gvt: Fix unsafe locking caused by spin_unlock_bh drm/i915: fix intel_backlight_device_register declaration drm/i915/fbdev: Serialise early hotplug events with async fbdev config drm/i915: Prevent zero length "index" write drm/i915: Don't try indexed reads to alternate slave addresses