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2016-01-10um: Add full asm/syscall.h supportMickaël Salaün
Add subarchitecture-independent implementation of asm-generic/syscall.h allowing access to user system call parameters and results: * syscall_get_nr() * syscall_rollback() * syscall_get_error() * syscall_get_return_value() * syscall_set_return_value() * syscall_get_arguments() * syscall_set_arguments() * syscall_get_arch() provided by arch/x86/um/asm/syscall.h This provides the necessary syscall helpers needed by HAVE_ARCH_SECCOMP_FILTER plus syscall_get_error(). This is inspired from Meredydd Luff's patch (https://gerrit.chromium.org/gerrit/21425). Signed-off-by: Mickaël Salaün <mic@digikod.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Richard Weinberger <richard@nod.at> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Kees Cook <keescook@chromium.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Will Drewry <wad@chromium.org> Cc: Meredydd Luff <meredydd@senatehouse.org> Cc: David Drysdale <drysdale@google.com> Signed-off-by: Richard Weinberger <richard@nod.at> Acked-by: Kees Cook <keescook@chromium.org>
2016-01-10selftests/seccomp: Remove the need for HAVE_ARCH_TRACEHOOKMickaël Salaün
Some architectures do not implement PTRACE_GETREGSET nor PTRACE_SETREGSET (required by HAVE_ARCH_TRACEHOOK) but only implement PTRACE_GETREGS and PTRACE_SETREGS (e.g. User-mode Linux). This improve seccomp selftest portability for architectures without HAVE_ARCH_TRACEHOOK support by defining a new trigger HAVE_GETREGS. For now, this is only enabled for i386 and x86_64 architectures. This is required to be able to run this tests on User-mode Linux. Signed-off-by: Mickaël Salaün <mic@digikod.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Richard Weinberger <richard@nod.at> Cc: Kees Cook <keescook@chromium.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Will Drewry <wad@chromium.org> Cc: Shuah Khan <shuahkh@osg.samsung.com> Cc: Meredydd Luff <meredydd@senatehouse.org> Cc: David Drysdale <drysdale@google.com> Signed-off-by: Richard Weinberger <richard@nod.at> Acked-by: Kees Cook <keescook@chromium.org>
2016-01-10um: Fix ptrace GETREGS/SETREGS bugsMickaël Salaün
This fix two related bugs: * PTRACE_GETREGS doesn't get the right orig_ax (syscall) value * PTRACE_SETREGS can't set the orig_ax value (erased by initial value) Get rid of the now useless and error-prone get_syscall(). Fix inconsistent behavior in the ptrace implementation for i386 when updating orig_eax automatically update the syscall number as well. This is now updated in handle_syscall(). Signed-off-by: Mickaël Salaün <mic@digikod.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Richard Weinberger <richard@nod.at> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Kees Cook <keescook@chromium.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Will Drewry <wad@chromium.org> Cc: Thomas Meyer <thomas@m3y3r.de> Cc: Nicolas Iooss <nicolas.iooss_linux@m4x.org> Cc: Anton Ivanov <aivanov@brocade.com> Cc: Meredydd Luff <meredydd@senatehouse.org> Cc: David Drysdale <drysdale@google.com> Signed-off-by: Richard Weinberger <richard@nod.at> Acked-by: Kees Cook <keescook@chromium.org>
2016-01-10um: link with -lpthreadVegard Nossum
Similarly to commit fb1770aa78a43530940d0c2dd161e77bc705bdac, with gcc 5 on Ubuntu and CONFIG_STATIC_LINK=y I was seeing these linker errors: /usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/librt.a(timer_create.o): In function `__timer_create_new': (.text+0xcd): undefined reference to `pthread_once' /usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/librt.a(timer_create.o): In function `__timer_create_new': (.text+0x126): undefined reference to `pthread_attr_init' /usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/librt.a(timer_create.o): In function `__timer_create_new': (.text+0x168): undefined reference to `pthread_attr_setdetachstate' [...] Obviously we also need -lpthread for librt.a. Cc: stable@vger.kernel.org # 4.4 Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-01-10um: Update UBD to use pread/pwrite family of functionsAnton Ivanov
This decreases the number of syscalls per read/write by half. Signed-off-by: Anton Ivanov <aivanov@brocade.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-01-10um: Do not change hard IRQ flags in soft IRQ processingAnton Ivanov
Software IRQ processing in generic architectures assumes that the exit out of hard IRQ may have re-enabled interrupts (some architectures may have an implicit EOI). It presumes them enabled and toggles the flags once more just in case unless this is turned off in the architecture specific hardirq.h by setting __ARCH_IRQ_EXIT_IRQS_DISABLED This patch adds this to UML where due to the way IRQs are handled it is an optimization (it works fine without it too). Signed-off-by: Anton Ivanov <aivanov@brocade.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-01-10um: Prevent IRQ handler reentrancyAnton Ivanov
The existing IRQ handler design in UML does not prevent reentrancy This is mitigated by fd-enable/fd-disable semantics for the IO portion of the UML subsystem. The timer, however, can and is re-entered resulting in very deep stack usage and occasional stack exhaustion. This patch prevents this by checking if there is a timer interrupt in-flight before processing any pending timer interrupts. Signed-off-by: Anton Ivanov <aivanov@brocade.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-01-10uml: flush stdout before forkingVegard Nossum
I was seeing some really weird behaviour where piping UML's output somewhere would cause output to get duplicated: $ ./vmlinux | head -n 40 Checking that ptrace can change system call numbers...Core dump limits : soft - 0 hard - NONE OK Checking syscall emulation patch for ptrace...Core dump limits : soft - 0 hard - NONE OK Checking advanced syscall emulation patch for ptrace...Core dump limits : soft - 0 hard - NONE OK Core dump limits : soft - 0 hard - NONE This is because these tests do a fork() which duplicates the non-empty stdout buffer, then glibc flushes the duplicated buffer as each child exits. A simple workaround is to flush before forking. Cc: stable@vger.kernel.org Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-01-10uml: fix hostfs mknod()Vegard Nossum
An inverted return value check in hostfs_mknod() caused the function to return success after handling it as an error (and cleaning up). It resulted in the following segfault when trying to bind() a named unix socket: Pid: 198, comm: a.out Not tainted 4.4.0-rc4 RIP: 0033:[<0000000061077df6>] RSP: 00000000daae5d60 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 000000006092a460 RCX: 00000000dfc54208 RDX: 0000000061073ef1 RSI: 0000000000000070 RDI: 00000000e027d600 RBP: 00000000daae5de0 R08: 00000000da980ac0 R09: 0000000000000000 R10: 0000000000000003 R11: 00007fb1ae08f72a R12: 0000000000000000 R13: 000000006092a460 R14: 00000000daaa97c0 R15: 00000000daaa9a88 Kernel panic - not syncing: Kernel mode fault at addr 0x40, ip 0x61077df6 CPU: 0 PID: 198 Comm: a.out Not tainted 4.4.0-rc4 #1 Stack: e027d620 dfc54208 0000006f da981398 61bee000 0000c1ed daae5de0 0000006e e027d620 dfcd4208 00000005 6092a460 Call Trace: [<60dedc67>] SyS_bind+0xf7/0x110 [<600587be>] handle_syscall+0x7e/0x80 [<60066ad7>] userspace+0x3e7/0x4e0 [<6006321f>] ? save_registers+0x1f/0x40 [<6006c88e>] ? arch_prctl+0x1be/0x1f0 [<60054985>] fork_handler+0x85/0x90 Let's also get rid of the "cosmic ray protection" while we're at it. Fixes: e9193059b1b3 "hostfs: fix races in dentry_name() and inode_name()" Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com> Cc: Jeff Dike <jdike@addtoit.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: stable@vger.kernel.org Signed-off-by: Richard Weinberger <richard@nod.at>
2016-01-10Input: gpio-keys - fix check for disabling unsupported keysDmitry Torokhov
Commit 4ea14a53d8f881034fa9e186653821c4e3d9a8fb ("Input: gpio-keys - report error when disabling unsupported key") tried let user know that they attempted to disable an unsupported key, unfortunately the check is wrong as it believes that all codes are invalid. Fix it by ensuring that keys that we try to disable are subset of keys (or switches) that device reports. Fixes: 4ea14a53d8f8 ("Input: gpio-keys - report error when disabling unsupported key") Reported-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> Tested-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2016-01-10cgroup: fix a typo.Rami Rosen
This patch fixes a typo in a comment in cgroup.c. Signed-off-by: Rami Rosen <rami.rosen@intel.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2016-01-10Merge branch 'for-4.5/block-dax' into for-4.5/libnvdimmDan Williams
2016-01-10m68k: Provide __phys_to_pfn() and __pfn_to_phys()Sudip Mukherjee
The defconfig build of m68k was failing with the error: implicit declaration of function '__pfn_to_phys' Other architectures have added <asm/memory.h>, but if we do so here then we will also get redeclaration of some other functions. So it is better to copy these macros into page.h. Fixes: 0a3c3bf11240 ("x86, mm: introduce vmem_altmap to augment vmemmap_populate()") Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org> Cc: Dan Williams <dan.j.williams@intel.com> Reported-by: Guenter Roeck <linux@roeck-us.net> (m68knommu) [geert: Apply to page.h instead of page_mm.h to cover nommu, reword] Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2016-01-10m68k/atari, m68k/sun3: Fix SCSI platform device registration when driver is ↵Finn Thain
modular Fixes: 3ff228af84b5 ("atari_scsi: Convert to platform device") Fixes: 0d31f8759109 ("sun3_scsi: Convert to platform device") Reported-by: Michael Schmitz <schmitzmic@gmail.com> Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2016-01-10ubifs: Use XATTR_*_PREFIX_LENRichard Weinberger
...instead of open coding it. Signed-off-by: Richard Weinberger <richard@nod.at>
2016-01-10UBIFS: add a comment in key.h for unused parameterDongsheng Yang
Add a comment in key.h to explain why we keep an unused parameter in key helpers. Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-01-10mtd: ubi: wl: avoid erasing a PEB which is emptySebastian Siewior
wear_leveling_worker() currently unconditionally puts a PEB on erase in the error case even it just been taken from the free_list and never used. In case the PEB was never used it can be put back on the free list saving a precious erase cycle. v1…v2: - to_leb_clean -> dst_leb_clean - use the nested option for ensure_wear_leveling() - do_sync_erase() can't go -ENOMEM so we can just go into RO-mode now. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-01-09block: kill disk_{check|set|clear|alloc}_badblocksDan Williams
These actions are completely managed by a block driver or can use the badblocks api directly. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-09libnvdimm, pmem: nvdimm_read_bytes() badblocks supportDan Williams
Support badblock checking in all the pmem read paths that do not go through the block layer. This protects info block reads (btt or pfn) as well as data reads to a pmem namespace via a btt instance. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-09pmem, dax: disable dax in the presence of bad blocksDan Williams
Longer term teach dax to punch "error" holes in mapping requests and deliver SIGBUS to applications that consume a bad pmem page. For now, simply disable the dax performance optimization in the presence of known errors. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-09Merge tag 'batman-adv-for-davem' of git://git.open-mesh.org/linux-mergeDavid S. Miller
Antonio Quartulli says: ==================== Included changes: - increase internal module version - increase BLA wait periods to 6 - purge BLA backbone table when it is disabled - make sure post function is invoked only if sysfs value is changed - simplify code by removing useless NULL checks - various corrections to existing kerneldoc - minor cleanups ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-09mlxsw: spectrum: remove FDB entry in case we get unknown object notificationJiri Pirko
It may happen that we get notification for FDB entry for object (port, lag, vport), which does not exist. Currently we ignore that, which only causes this being re-sent in next notification. The entry will never disappear. So get rid of it by simply removing it using SFD register. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Reviewed-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-09mlxsw: spectrum: pass local_port to mlxsw_sp_port_fdb_uc_opJiri Pirko
Do not pass struct mlxsw_sp_port to mlxsw_sp_port_fdb_uc_op and rather just pass local_port. This is needed in case this is called from SFN process function and mlxsw_sp_port is not existent for particular local_port. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Reviewed-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-09vxlan: fix test which detect duplicate vxlan ifaceNicolas Dichtel
When a vxlan interface is created, the driver checks that there is not another vxlan interface with the same properties. To do this, it checks the existing vxlan udp socket. Since commit 1c51a9159dde, the creation of the vxlan socket is done only when the interface is set up, thus it breaks that test. Example: $ ip l a vxlan10 type vxlan id 10 group 239.0.0.10 dev eth0 dstport 0 $ ip l a vxlan11 type vxlan id 10 group 239.0.0.10 dev eth0 dstport 0 $ ip -br l | grep vxlan vxlan10 DOWN f2:55:1c:6a:fb:00 <BROADCAST,MULTICAST> vxlan11 DOWN 7a:cb:b9:38:59:0d <BROADCAST,MULTICAST> Instead of checking sockets, let's loop over the vxlan iface list. Fixes: 1c51a9159dde ("vxlan: fix race caused by dropping rtnl_unlock") Reported-by: Thomas Faivre <thomas.faivre@6wind.com> Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-09net: plip: use new parport device modelSudip Mukherjee
Modify plip driver to use the new parallel port device model. Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-09cdc-acm: fix NULL pointer referenceOliver Neukum
The union descriptor must be checked. Its usage was conditional before the parser was introduced. This is important, because many RNDIS device, which also use the common parser, have bogus extra descriptors. Signed-off-by: Oliver Neukum <oneukum@suse.com> Tested-by: Vasily Galkin <galkin-vv@yandex.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-09Merge tag 'scsi-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi Pull SCSI fix from James Bottomley: "A single fix for machines with pages > 4k (PPC mostly). There's a bug in our optimal transfer size code where we don't account for pages > 4k and can set the transfer size to be less than the page size causing nasty failures" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: sd: Reject optimal transfer length smaller than page size
2016-01-09Merge tag 'pci-v4.4-fixes-4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull PCI fixlet from Bjorn Helgaas: "This marks the TI DRA7xx host bridge driver as broken. Apparently it has never worked without some additional out-of-tree code, so I'm going to mark it broken now and remove it completely next cycle unless it's fixed" * tag 'pci-v4.4-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: PCI: dra7xx: Mark driver as broken
2016-01-09pmem: fail io-requests to known bad blocksDan Williams
Check the sectors specified in a read bio to see if they hit a known bad block, and return an error code pmem_do_bvec(). Note that the ->rw_page() is not in a position to return errors. For now, copy the same layering violation present in zram_rw_page() to avoid crashes of the form: kernel BUG at mm/filemap.c:822! [..] Call Trace: [<ffffffff811c540e>] page_endio+0x1e/0x60 [<ffffffff81290d29>] mpage_end_io+0x39/0x60 [<ffffffff8141c4ef>] bio_endio+0x3f/0x60 [<ffffffffa005c491>] pmem_make_request+0x111/0x230 [nd_pmem] ...i.e. unlock a page that was already unlocked via pmem_rw_page() => page_endio(). Reported-by: Vishal Verma <vishal.l.verma@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-09libnvdimm: convert to statically allocated badblocksDan Williams
If a device will ever have badblocks it should always have a badblocks instance available. So, similar to md, embed a badblocks instance in pmem_device. This reduces pointer chasing in the i/o fast path, and simplifies the init path. Reported-by: Vishal Verma <vishal.l.verma@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-09libnvdimm: don't fail init for full badblocks listDan Williams
If the badblocks list runs out of space it simply means that software is unable to intercept all errors. This is no different than the latent discovery of new badblocks case and should not be an initialization failure condition. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-09block, badblocks: introduce devm_init_badblocksDan Williams
Provide a devres interface for initializing a badblocks instance. The pmem driver has several scenarios where it will be beneficial to have this structure automatically freed when the device is disabled / fails probe. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-09block: clarify badblocks lifetimeDan Williams
The badblocks list attached to a gendisk is allocated by the driver which equates to the driver owning the lifetime of the object. Do not automatically free it in del_gendisk(). This is in preparation for expanding the use of badblocks in libnvdimm drivers and introducing devm_init_badblocks(). Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-09badblocks: rename badblocks_free to badblocks_exitDan Williams
For symmetry with badblocks_init() make it clear that this path only destroys incremental allocations of a badblocks instance, and does not free the badblocks instance itself. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-09libnvdimm, pmem: move definition of nvdimm_namespace_add_poison to nd.hDan Williams
nd-core.h is private to the libnvdimm core internals and should not be used by drivers. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-09libnvdimm: Add a poison list and export badblocksVishal Verma
During region creation, perform Address Range Scrubs (ARS) for the SPA (System Physical Address) ranges to retrieve known poison locations from firmware. Add a new data structure 'nd_poison' which is used as a list in nvdimm_bus to store these poison locations. When creating a pmem namespace, if there is any known poison associated with its physical address space, convert the poison ranges to bad sectors that are exposed using the badblocks interface. Signed-off-by: Vishal Verma <vishal.l.verma@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-09nfit_test: Enable DSMs for all test NFITsDan Williams
In preparation for getting a poison list using ARS DSMs, enable DSMs for all manufactured NFITs supplied by the test framework. Also, supply valid response data for ars_status. Signed-off-by: Vishal Verma <vishal.l.verma@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-09md: convert to use the generic badblocks codeVishal Verma
Retain badblocks as part of rdev, but use the accessor functions from include/linux/badblocks for all manipulation. Signed-off-by: Vishal Verma <vishal.l.verma@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-09block: Add badblock management for gendisksVishal Verma
NVDIMM devices, which can behave more like DRAM rather than block devices, may develop bad cache lines, or 'poison'. A block device exposed by the pmem driver can then consume poison via a read (or write), and cause a machine check. On platforms without machine check recovery features, this would mean a crash. The block device maintaining a runtime list of all known sectors that have poison can directly avoid this, and also provide a path forward to enable proper handling/recovery for DAX faults on such a device. Use the new badblock management interfaces to add a badblocks list to gendisks. Signed-off-by: Vishal Verma <vishal.l.verma@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-09Merge tag 'perf-core-for-mingo' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo: New features: - Allow using trace events fields as sort order keys, making 'perf evlist --trace_fields' show those, and then the user can select a subset and use like: perf top -e sched:sched_switch -s prev_comm,next_comm That works as well in 'perf report' when handling files containing tracepoints. The default when just tracepoint events are found in a perf.data file is to format it like ftrace, using the libtraceevent formatters, plugins, etc (Namhyung Kim) - Add support in 'perf script' to process 'perf stat record' generated files, culminating in a python perf script that calculates CPI (Cycles per Instruction) (Jiri Olsa) - Show random perf tool tips in the 'perf report' bottom line (Namhyung Kim) - perf report now defaults to --group if the perf.data file has grouped events, try it with: # perf record -e '{cycles,instructions}' -a sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 1.093 MB perf.data (1247 samples) ] # perf report # Samples: 1K of event 'anon group { cycles, instructions }' # Event count (approx.): 1955219195 # # Overhead Command Shared Object Symbol 2.86% 0.22% swapper [kernel.kallsyms] [k] intel_idle 1.05% 0.33% firefox libxul.so [.] js::SetObjectElement 1.05% 0.00% kworker/0:3 [kernel.kallsyms] [k] gen6_ring_get_seqno 0.88% 0.17% chrome chrome [.] 0x0000000000ee27ab 0.65% 0.86% firefox libxul.so [.] js::ValueToId<(js::AllowGC)1> 0.64% 0.23% JS Helper libxul.so [.] js::SplayTree<js::jit::LiveRange*, js::jit::LiveRange>::splay 0.62% 1.27% firefox libxul.so [.] js::GetIterator 0.61% 1.74% firefox libxul.so [.] js::NativeSetProperty 0.61% 0.31% firefox libxul.so [.] js::SetPropertyByDefining User visible fixes: - Coect data mmaps so that the DWARF unwinder can handle usecases needing them, like softice (Jiri Olsa) - Decay callchains in fractal mode, fixing up cases where 'perf top -g' would show entries with more than 100% (Namhyung Kim) Infrastructure changes: - Sync tools/lib with the lib/ in the kernel sources for find_bit.c and move bitmap.[ch] from tools/perf/util/ to tools/lib/ (Arnaldo Carvalho de Melo) - No need to set attr.sample_freq in some 'perf test' entries that only want to deal with PERF_RECORD_ meta-events, improve a bit error output for CQM test (Arnaldo Carvalho de Melo) - Fix python binding build, adding some missing object files now required due to cpumap using find_bit stuff (Arnaldo Carvalho de Melo) - tools/build improvemnts (Jiri Olsa) - Add more files to cscope/ctags databases (Jiri Olsa) - Do not show 'trace' in 'perf help' if it is not compiled in (Jiri Olsa) - Make perf_evlist__open() open evsels with their cpus and threads, like perf record does, making them consistent (Adrian Hunter) - Fix pmu snapshot initialization bug (Stephane Eranian) - Add missing headers in perf's MANIFEST (Wang Nan) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-09hwmon: (nct6683) Add basic support for NCT6683 on Mitac boardsGuenter Roeck
Mitac microcode differs from Intel microcode. One key difference is that pwm values can be written. Detect vendor from customer ID field and no longer use DMI data to identify which microcode is running on the chip. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2016-01-09badblocks: Add core badblock management codeVishal Verma
Take the core badblocks implementation from md, and make it generally available. This follows the same style as kernel implementations of linked lists, rb-trees etc, where you can have a structure that can be embedded anywhere, and accessor functions to manipulate the data. The only changes in this copy of the code are ones to generalize function/variable names from md-specific ones. Also add init and free functions. Signed-off-by: Vishal Verma <vishal.l.verma@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-09block: fix del_gendisk() vs blkdev_ioctl crashDan Williams
When tearing down a block device early in its lifetime, userspace may still be performing discovery actions like blkdev_ioctl() to re-read partitions. The nvdimm_revalidate_disk() implementation depends on disk->driverfs_dev to be valid at entry. However, it is set to NULL in del_gendisk() and fatally this is happening *before* the disk device is deleted from userspace view. There's no reason for del_gendisk() to clear ->driverfs_dev. That device is the parent of the disk. It is guaranteed to not be freed until the disk, as a child, drops its ->parent reference. We could also fix this issue locally in nvdimm_revalidate_disk() by using disk_to_dev(disk)->parent, but lets fix it globally since ->driverfs_dev follows the lifetime of the parent. Longer term we should probably just add a @parent parameter to add_disk(), and stop carrying this pointer in the gendisk. BUG: unable to handle kernel NULL pointer dereference at (null) IP: [<ffffffffa00340a8>] nvdimm_revalidate_disk+0x18/0x90 [libnvdimm] CPU: 2 PID: 538 Comm: systemd-udevd Tainted: G O 4.4.0-rc5 #2257 [..] Call Trace: [<ffffffff8143e5c7>] rescan_partitions+0x87/0x2c0 [<ffffffff810f37f9>] ? __lock_is_held+0x49/0x70 [<ffffffff81438c62>] __blkdev_reread_part+0x72/0xb0 [<ffffffff81438cc5>] blkdev_reread_part+0x25/0x40 [<ffffffff8143982d>] blkdev_ioctl+0x4fd/0x9c0 [<ffffffff811246c9>] ? current_kernel_time64+0x69/0xd0 [<ffffffff812916dd>] block_ioctl+0x3d/0x50 [<ffffffff81264c38>] do_vfs_ioctl+0x308/0x560 [<ffffffff8115dbd1>] ? __audit_syscall_entry+0xb1/0x100 [<ffffffff810031d6>] ? do_audit_syscall_entry+0x66/0x70 [<ffffffff81264f09>] SyS_ioctl+0x79/0x90 [<ffffffff81902672>] entry_SYSCALL_64_fastpath+0x12/0x76 Reported-by: Robert Hu <robert.hu@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-09block: enable dax for raw block devicesDan Williams
If an application wants exclusive access to all of the persistent memory provided by an NVDIMM namespace it can use this raw-block-dax facility to forgo establishing a filesystem. This capability is targeted primarily to hypervisors wanting to provision persistent memory for guests. It can be disabled / enabled dynamically via the new BLKDAXSET ioctl. Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Dave Chinner <david@fromorbit.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Reported-by: kbuild test robot <fengguang.wu@intel.com> Reviewed-by: Jan Kara <jack@suse.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-09block: introduce bdev_file_inode()Dan Williams
Similar to the file_inode() helper, provide a helper to lookup the inode for a raw block device itself. Cc: Al Viro <viro@zeniv.linux.org.uk> Suggested-by: Jan Kara <jack@suse.cz> Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-09restrict /dev/mem to idle io memory rangesDan Williams
This effectively promotes IORESOURCE_BUSY to IORESOURCE_EXCLUSIVE semantics by default. If userspace really believes it is safe to access the memory region it can also perform the extra step of disabling an active driver. This protects device address ranges with read side effects and otherwise directs userspace to use the driver. Persistent memory presents a large "mistake surface" to /dev/mem as now accidental writes can corrupt a filesystem. In general if a device driver is busily using a memory region it already informs other parts of the kernel to not touch it via request_mem_region(). /dev/mem should honor the same safety restriction by default. Debugging a device driver from userspace becomes more difficult with this enabled. Any application using /dev/mem or mmap of sysfs pci resources will now need to perform the extra step of either: 1/ Disabling the driver, for example: echo <device id> > /dev/bus/<parent bus>/drivers/<driver name>/unbind 2/ Rebooting with "iomem=relaxed" on the command line 3/ Recompiling with CONFIG_IO_STRICT_DEVMEM=n Traditional users of /dev/mem like dosemu are unaffected because the first 1MB of memory is not subject to the IO_STRICT_DEVMEM restriction. Legacy X configurations use /dev/mem to talk to graphics hardware, but that functionality has since moved to kernel graphics drivers. Cc: Arnd Bergmann <arnd@arndb.de> Cc: Russell King <linux@arm.linux.org.uk> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Kees Cook <keescook@chromium.org> Acked-by: Ingo Molnar <mingo@redhat.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-09arch: consolidate CONFIG_STRICT_DEVM in lib/Kconfig.debugDan Williams
Let all the archs that implement devmem_is_allowed() opt-in to a common definition of CONFIG_STRICT_DEVM in lib/Kconfig.debug. Cc: Kees Cook <keescook@chromium.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Will Deacon <will.deacon@arm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "David S. Miller" <davem@davemloft.net> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> [heiko: drop 'default y' for s390] Acked-by: Ingo Molnar <mingo@redhat.com> Suggested-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-01-09batman-adv: Add kerneldoc for batadv_neigh_node::refcountSven Eckelmann
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Antonio Quartulli <a@unstable.cc>
2016-01-09batman-adv: Remove kerneldoc for missing struct membersSven Eckelmann
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Antonio Quartulli <a@unstable.cc>
2016-01-09batman-adv: Fix kerneldoc member names in for main structsSven Eckelmann
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Antonio Quartulli <a@unstable.cc>
generated by cgit (git 2.34.1) at 2025-09-19 03:23:42 +0000