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2017-10-24Merge branch 'for-mingo' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu Pull RCU updates from Paul E. McKenney: - Documentation updates - Miscellaneous fixes - RCU CPU stall-warning updates - Torture-test updates Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-10-24cpu/hotplug: Remove obsolete notifier macrosYanjiang Jin
commit 530e9b76ae8f ("cpu/hotplug: Remove obsolete cpu hotplug register/unregister functions")' removed the below macros: - #define CPU_UP_CANCELED 0x0004 /* CPU (unsigned)v NOT coming up */ - #define CPU_DOWN_PREPARE 0x0005 /* CPU (unsigned)v going down */ - #define CPU_DOWN_FAILED 0x0006 /* CPU (unsigned)v NOT going down */ But "CPU_UP_CANCELED_FROZEN, CPU_DOWN_PREPARE_FROZEN and CPU_DOWN_FAILED_FROZEN" still refer to them, and nobody uses these "FROZEN" macros now, so remove them too. Signed-off-by: Yanjiang Jin <yanjiang.jin@windriver.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: peterz@infradead.org Cc: bigeasy@linutronix.de Cc: jinyanjiang@gmail.com Link: https://lkml.kernel.org/r/20171024062341.179678-1-yanjiang.jin@windriver.com
2017-10-24x86/platform/UV: Mark tsc_check_sync as an init functionmike.travis@hpe.com
Fix build problem: >> WARNING: vmlinux.o(.text+0x4223a): Section mismatch in reference from the function uv_tsc_check_sync() to the function .init.text:uv_early_read_mmr() The function uv_tsc_check_sync() references the function __init uv_early_read_mmr(). This is often because uv_tsc_check_sync lacks a __init Signed-off-by: Mike Travis <mike.travis@hpe.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Dimitri Sivanich <dimitri.sivanich@hpe.com> Cc: Russ Anderson <russ.anderson@hpe.com> Cc: Andrew Banman <andrew.banman@hpe.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Bin Gao <bin.gao@linux.intel.com> Link: https://lkml.kernel.org/r/20171023191841.985614692@stormcage.americas.sgi.com
2017-10-23xfs: fix AIM7 regressionChristoph Hellwig
Apparently our current rwsem code doesn't like doing the trylock, then lock for real scheme. So change our read/write methods to just do the trylock for the RWF_NOWAIT case. This fixes a ~25% regression in AIM7. Fixes: 91f9943e ("fs: support RWF_NOWAIT for buffered reads") Reported-by: kernel test robot <xiaolong.ye@intel.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2017-10-24kbuild: clang: fix build failures with sparse checkDavid Lin
We should avoid using the space character when passing arguments to clang, because static code analysis check tool such as sparse may misinterpret the arguments followed by spaces as build targets hence cause the build to fail. Signed-off-by: David Lin <dtwlin@google.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-10-24kbuild doc: a bundle of fixes on makefiles.txtCao jin
It does several fixes: 1. move the displaced ld example to its reasonable place. 2. add new example for command gzip. 3. fix 2 number errors. 4. fix format of chapter 7.x, make it looks the same as other chapters. Signed-off-by: Cao jin <caoj.fnst@cn.fujitsu.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-10-23perf vendor events: Add Goldmont Plus V1 event fileKan Liang
Add a Intel event file for perf. Signed-off-by: Kan Liang <Kan.liang@intel.com> Acked-by: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/1508331907-395162-1-git-send-email-kan.liang@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-23perf namespaces: Add more appropriate set of headersArnaldo Carvalho de Melo
We don't need perf.h, that is a kitchen sink, all we need is perf_events.h for perf_ns_link_info, sys/types.h for pid_t and linux/types.h for u64, list_head. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Li Zhijian <lizhijian@cn.fujitsu.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-f2uxyaj4s2hmntkrezpa6dqz@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-23perf kmem: Perform some cleanup if '--time' is given an invalid valueChristophe JAILLET
If the string passed in '--time' is invalid, we must do some cleanup before leaving. As in the other error handling paths of this function. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: kernel-janitors@vger.kernel.org Fixes: 2a865bd8dddd ("perf kmem: Add option to specify time window of interest") Link: http://lkml.kernel.org/r/20170916060936.28199-1-christophe.jaillet@wanadoo.fr Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-23perf script: Fix error handling pathChristophe JAILLET
If the string passed in '--time' is invalid, or if failed to set libtraceevent function resolver, we must do some cleanup before leaving. As in the other error handling paths of this function. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: kernel-janitors@vger.kernel.org Link: http://lkml.kernel.org/r/20170916062537.28921-1-christophe.jaillet@wanadoo.fr Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-23perf script: Use fprintf like printing uniformlyArnaldo Carvalho de Melo
We've been mixing print() with fprintf() style printing for a while, but now we need to use fprintf() like syntax uniformly as a preparatory patch for supporting printing to different files, one per event. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Cc: yuzhoujian <yuzhoujian@didichuxing.com> Link: http://lkml.kernel.org/n/tip-kv5z3v8ptfghbarv3a9usvin@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-23perf tools: Introduce binary__fprintf()Arnaldo Carvalho de Melo
Out of print_binary() but receiving a fp pointer and expecting that the printer be a fprintf like function, i.e. receive a FILE pointer and return the number of characters printed. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Cc: yuzhoujian <yuzhoujian@didichuxing.com> Link: http://lkml.kernel.org/n/tip-6oqnxr6lmgqe6q6p3iugnscx@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-23perf vendor events: Fix incorrect cmask syntax for some Intel metricsAndi Kleen
Some of the metrics use an incorrect syntax for specifying the cmask for an event. Convert to perf syntax so that they can be resolved. Fixes metrics on Broadwell, SandyBridge. Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/n/tip-3k3fkfj8obek9dkmryyrqzhu@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-23perf tools: Do not check ABI headers in a detached tarball buildArnaldo Carvalho de Melo
When we use one of: [acme@jouet linux]$ make help | grep perf perf-tar-src-pkg - Build perf-4.14.0-rc3.tar source tarball perf-targz-src-pkg - Build perf-4.14.0-rc3.tar.gz source tarball perf-tarbz2-src-pkg - Build perf-4.14.0-rc3.tar.bz2 source tarball perf-tarxz-src-pkg - Build perf-4.14.0-rc3.tar.xz source tarball [acme@jouet linux]$ I.e. when we create a detached tarball to build perf outside outside the enveloping kernel sources (from a kernel tarball or a checked out linux.git directory) we by definition can't check for differences among the tools/{include,arch}, etc files we originally copied from the kernel, so bail out in that case, to avoid warnings when doing the detached builds. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-vbrga0mhplv7niwxr3ghjyxv@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-23Merge tag 'platform-drivers-x86-v4.14-3' of ↵Linus Torvalds
git://git.infradead.org/linux-platform-drivers-x86 Pull x86 platform driver fixes from Darren Hart: "Use a spin_lock instead of mutex in atomic context. The devm_ fix is a dependency. Summary: intel_pmc_ipc: - Use spin_lock to protect GCR updates - Use devm_* calls in driver probe function" * tag 'platform-drivers-x86-v4.14-3' of git://git.infradead.org/linux-platform-drivers-x86: platform/x86: intel_pmc_ipc: Use spin_lock to protect GCR updates platform/x86: intel_pmc_ipc: Use devm_* calls in driver probe function
2017-10-23platform/x86: intel_pmc_ipc: Use spin_lock to protect GCR updatesKuppuswamy Sathyanarayanan
Currently, update_no_reboot_bit() function implemented in this driver uses mutex_lock() to protect its register updates. But this function is called with in atomic context in iTCO_wdt_start() and iTCO_wdt_stop() functions in iTCO_wdt.c driver, which in turn causes "sleeping into atomic context" issue. This patch fixes this issue by replacing the mutex_lock() with spin_lock() to protect the GCR read/write/update APIs. Fixes: 9d855d4 ("platform/x86: intel_pmc_ipc: Fix iTCO_wdt GCS memory mapping failure") Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kupuswamy@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2017-10-23platform/x86: intel_pmc_ipc: Use devm_* calls in driver probe functionKuppuswamy Sathyanarayanan
This patch cleans up unnecessary free/alloc calls in ipc_plat_probe(), ipc_pci_probe() and ipc_plat_get_res() functions by using devm_* calls. This patch also adds proper error handling for failure cases in ipc_pci_probe() function. Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> [andy: fixed style issues, missed devm_free_irq(), removed unnecessary log message] Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2017-10-23Documentation: Add my name to kernel enforcement statementMartin K. Petersen
The kernel enforcement statement commit had my Acked-by: but missed my name in the document signatures. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-10-23Merge branch 'for-4.14-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq Pull workqueue fix from Tejun Heo: "This is a fix for an old bug in workqueue. Workqueue used a mutex to arbitrate who gets to be the manager of a pool. When the manager role gets released, the mutex gets unlocked while holding the pool's irqsafe spinlock. This can lead to deadlocks as mutex's internal spinlock isn't irqsafe. This got discovered by recent fixes to mutex lockdep annotations. The fix is a bit invasive for rc6 but if anything were wrong with the fix it would likely have already blown up in -next, and we want the fix in -stable anyway" * 'for-4.14-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: workqueue: replace pool->manager_arb mutex with a flag
2017-10-23Merge tag 'pinctrl-v4.14-4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl Pull pin control fixes from Linus Walleij: "Two last minute fixes for pin controllers, both regressions in specific drivers: - Fix a touchpad pin control issue on the AMD affecting Asus laptops - Fix an interrupt handling regression on the MCP23s08" * tag 'pinctrl-v4.14-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: pinctrl: mcp23s08: fix interrupt handling regression pinctrl/amd: fix masking of GPIO interrupts
2017-10-23Merge tag 'regulator-fix-v4.14-rc5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator Pull regulator fixes from Mark Brown: "A couple of small driver specific bug fixes that have been collected since the merge window" * tag 'regulator-fix-v4.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator: regulator: rn5t618: Do not index regulator_desc arrays by id regulator: axp20x: Fix poly-phase bit offset for AXP803 DCDC5/6
2017-10-23nvme-rdma: fix possible hang when issuing commands during ctrl removalSagi Grimberg
nvme_rdma_queue_is_ready() fails requests in case a queue is not LIVE. If the controller is in RECONNECTING state, we might be in this state for a long time (until we successfully reconnect) and we are better off with failing the request fast. Otherwise, we fail with BLK_STS_RESOURCE to have the block layer try again soon. In case we are removing the controller when the admin queue is not LIVE, we will terminate the request with BLK_STS_RESOURCE but it happens before we call blk_mq_start_request() so the request timeout never expires, and the queue will never get back to LIVE (because we are removing the controller). This causes the removal operation to block infinitly [1]. Thus, if we are removing (state DELETING), and the queue is not LIVE, we need to fail the request permanently as there is no chance for it to ever complete successfully. [1] -- sysrq: SysRq : Show Blocked State task PC stack pid father kworker/u66:2 D 0 440 2 0x80000000 Workqueue: nvme-wq nvme_rdma_del_ctrl_work [nvme_rdma] Call Trace: __schedule+0x3e9/0xb00 schedule+0x40/0x90 schedule_timeout+0x221/0x580 io_schedule_timeout+0x1e/0x50 wait_for_completion_io_timeout+0x118/0x180 blk_execute_rq+0x86/0xc0 __nvme_submit_sync_cmd+0x89/0xf0 nvmf_reg_write32+0x4b/0x90 [nvme_fabrics] nvme_shutdown_ctrl+0x41/0xe0 nvme_rdma_shutdown_ctrl+0xca/0xd0 [nvme_rdma] nvme_rdma_remove_ctrl+0x2b/0x40 [nvme_rdma] nvme_rdma_del_ctrl_work+0x25/0x30 [nvme_rdma] process_one_work+0x1fd/0x630 worker_thread+0x1db/0x3b0 kthread+0x11e/0x150 ret_from_fork+0x27/0x40 01 D 0 2868 2862 0x00000000 Call Trace: __schedule+0x3e9/0xb00 schedule+0x40/0x90 schedule_timeout+0x260/0x580 wait_for_completion+0x108/0x170 flush_work+0x1e0/0x270 nvme_rdma_del_ctrl+0x5a/0x80 [nvme_rdma] nvme_sysfs_delete+0x2a/0x40 dev_attr_store+0x18/0x30 sysfs_kf_write+0x45/0x60 kernfs_fop_write+0x124/0x1c0 __vfs_write+0x28/0x150 vfs_write+0xc7/0x1b0 SyS_write+0x49/0xa0 entry_SYSCALL_64_fastpath+0x18/0xad -- Reported-by: Bart Van Assche <bart.vanassche@wdc.com> Signed-off-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Christoph Hellwig <hch@lst.de>
2017-10-23perf annotate: Remove arch::cpuid_parse callbackJiri Olsa
There's no need for extra cpuid_parse arch callback, it can be handled directly in init callback. Adding the init function to x86 to cover the cpuid initialization. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20171011150158.11895-2-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-23perf list: Fix group description in the man pageAndi Kleen
Fix an incorrect description in the 'perf list' manpage. When a group does not fit into the hardware it is partially scheduled, but does not error out. Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Link: http://lkml.kernel.org/r/20171010224322.15861-1-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-23perf tests attr: Make hw events optionalJiri Olsa
Otherwise we fail on virtual machines with no support for specific HW events. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20171009130712.14747-1-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-23perf mmap: Adopt push method from builtin-record.cArnaldo Carvalho de Melo
The previous prep patch was just to show exactly what changed in that function, now its time to move that method and things only it uses to the right place, mmap.[ch] Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-aaxywfgw3d44x6xlu8zm1avu@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-23perf record: Make record__mmap_read genericArnaldo Carvalho de Melo
It becomes a perf_mmap method, "push", that build reads from a mmap and "pushes" it to a consumer, that in the initial case, for 'perf record', just writes it to the perf.data file descriptor, but may be used by 'top', etc. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-u4l1qjbi6l76r2k0nv99220n@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-23perf mmap: Move perf_mmap and methods to separate mmap.[ch] filesArnaldo Carvalho de Melo
To better organize the sources, and we may end up even using it directly, without evlists and evsels. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-oiqrm7grflurnnzo2ovfnslg@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-23perf vendor events: Update JSON metrics for Skylake ServerAndi Kleen
Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/20170914200748.GA13837@tassilo.jf.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-23perf vendor events: Update JSON metrics for SkylakeAndi Kleen
Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/20170914200748.GA13837@tassilo.jf.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-23perf vendor events: Update JSON metrics for Sandy BridgeAndi Kleen
Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/20170914200748.GA13837@tassilo.jf.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-23perf vendor events: Update JSON metrics for JakeTownAndi Kleen
Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/20170914200748.GA13837@tassilo.jf.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-23perf vendor events: Update JSON metrics for IvyTownAndi Kleen
Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/20170914200748.GA13837@tassilo.jf.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-23perf vendor events: Update JSON metrics for IvyBridgeAndi Kleen
Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/20170914200748.GA13837@tassilo.jf.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-23perf vendor events: Update JSON metrics for Haswell ServerAndi Kleen
Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/20170914200748.GA13837@tassilo.jf.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-23perf vendor events: Update JSON metrics for HaswellAndi Kleen
Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/20170914200748.GA13837@tassilo.jf.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-23perf vendor events: Update JSON metrics for Broadwell ServerAndi Kleen
Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/20170914200748.GA13837@tassilo.jf.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-23perf vendor events: Update JSON metrics for BroadwellAndi Kleen
Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/20170914200748.GA13837@tassilo.jf.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-23scripts: Add a script to find unused documentationsayli karnik
Add a script that finds files with kernel-doc comments for imported functions that are not included anywhere in documentation. Signed-off-by: sayli karnik <karniksayli1995@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-10-23sched/swait: Document it clearly that the swait facilities are special and ↵Davidlohr Bueso
shouldn't be used We currently welcome using swait over wait whenever possible because it is a slimmer data structure. However, Linus has made it very clear that he does not want this used, unless under very specific RT scenarios (such as current users). Update the comments before kernel hipsters start thinking swait is the cool thing to do. Signed-off-by: Davidlohr Bueso <dbueso@suse.de> Acked-by: Luis R. Rodriguez <mcgrof@kernel.org> 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: Thomas Gleixner <tglx@linutronix.de> Cc: dave@stgolabs.net Cc: wagi@monom.org Link: http://lkml.kernel.org/r/20171020171346.24445-1-dave@stgolabs.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-10-23lkdtm, kprobes: Convert from jprobes to kprobesKees Cook
The jprobes subsystem is being removed, so convert to using kprobes instead. Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20171020133127.GA18360@beast Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-10-23x86/asm: Don't use the confusing '.ifeq' directiveJosh Poimboeuf
I find the '.ifeq <expression>' directive to be confusing. Reading it quickly seems to suggest its opposite meaning, or that it's missing an argument. Improve readability by replacing all of its x86 uses with '.if <expression> == 0'. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andrei Vagin <avagin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/757da028e802c7e98d23fbab8d234b1063e161cf.1508516398.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-10-23Merge branch 'core/objtool' into x86/asm, to pick up dependent changesIngo Molnar
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-10-23Merge branch 'x86/urgent' into x86/asm, to pick up dependent fixesIngo Molnar
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-10-23x86/unwind: Show function name+offset in ORC error messagesJosh Poimboeuf
Improve the warning messages to show the relevant function name+offset. This makes it much easier to diagnose problems with the ORC metadata. Before: WARNING: can't dereference iret registers at ffff8801c5f17fe0 for ip ffffffff95f0d94b After: WARNING: can't dereference iret registers at ffff880178f5ffe0 for ip int3+0x5b/0x60 Reported-by: Andrei Vagin <avagin@virtuozzo.com> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Fixes: ee9f8fce9964 ("x86/unwind: Add the ORC unwinder") Link: http://lkml.kernel.org/r/6bada6b9eac86017e16bd79e1e77877935cb50bb.1508516398.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-10-23x86/entry: Fix idtentry unwind hintJosh Poimboeuf
This fixes the following ORC warning in the 'int3' entry code: WARNING: can't dereference iret registers at ffff8801c5f17fe0 for ip ffffffff95f0d94b The ORC metadata had the wrong stack offset for the iret registers. Their location on the stack is dependent on whether the exception has an error code. Reported-and-tested-by: Andrei Vagin <avagin@virtuozzo.com> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Fixes: 8c1f75587a18 ("x86/entry/64: Add unwind hint annotations") Link: http://lkml.kernel.org/r/931d57f0551ed7979d5e7e05370d445c8e5137f8.1508516398.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-10-23Linux 4.14-rc6v4.14-rc6Linus Torvalds
2017-10-23Merge tag 'staging-4.14-rc6' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging Pull staging and IIO fixes from Greg KH: "Here are a small number of patches to resolve some reported IIO and a staging driver problem. Nothing major here, full details are in the shortlog below. All have been in linux-next with no reported issues" * tag 'staging-4.14-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: staging: bcm2835-audio: Fix memory corruption iio: adc: at91-sama5d2_adc: fix probe error on missing trigger property iio: adc: dln2-adc: fix build error iio: dummy: events: Add missing break staging: iio: ade7759: fix signed extension bug on shift of a u8 iio: pressure: zpa2326: Remove always-true check which confuses gcc iio: proximity: as3935: noise detection + threshold changes
2017-10-23Merge tag 'char-misc-4.14-rc6' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull char/misc driver fixes from Greg KH: "Here are four small fixes for 4.14-rc6. Three of them are binder driver fixes for reported issues, and the last one is a hyperv driver bugfix. Nothing major, but good fixes to get into 4.14-final. All of these have been in linux-next with no reported issues" * tag 'char-misc-4.14-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: android: binder: Fix null ptr dereference in debug msg android: binder: Don't get mm from task vmbus: hvsock: add proper sync for vmbus_hvsock_device_unregister() binder: call poll_wait() unconditionally.
2017-10-23Merge tag 'usb-4.14-rc6' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB/PHY fixes from Greg KH: "Here are a small number of USB and PHY driver fixes for 4.14-rc6 There is the usual musb and xhci fixes in here, as well as some needed phy patches. Also is a nasty regression fix for usbfs that has started to hit a lot of people using virtual machines. All of these have been in linux-next with no reported problems" * tag 'usb-4.14-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (26 commits) usb: hub: Allow reset retry for USB2 devices on connect bounce USB: core: fix out-of-bounds access bug in usb_get_bos_descriptor() MAINTAINERS: fix git tree url for musb module usb: quirks: add quirk for WORLDE MINI MIDI keyboard usb: musb: sunxi: Explicitly release USB PHY on exit usb: musb: Check for host-mode using is_host_active() on reset interrupt usb: musb: musb_cppi41: Configure the number of channels for DA8xx usb: musb: musb_cppi41: Fix cppi41_set_dma_mode() for DA8xx usb: musb: musb_cppi41: Fix the address of teardown and autoreq registers USB: musb: fix late external abort on suspend USB: musb: fix session-bit runtime-PM quirk usb: cdc_acm: Add quirk for Elatec TWN3 USB: devio: Revert "USB: devio: Don't corrupt user memory" usb: xhci: Handle error condition in xhci_stop_device() usb: xhci: Reset halted endpoint if trb is noop xhci: Cleanup current_cmd in xhci_cleanup_command_queue() xhci: Identify USB 3.1 capable hosts by their port protocol capability USB: serial: metro-usb: add MS7820 device id phy: rockchip-typec: Check for errors from tcphy_phy_init() phy: rockchip-typec: Don't set the aux voltage swing to 400 mV ...
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