Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

Pull RCU updates from Ingo Molnar:
 "The main RCU related changes in this cycle were:

   - Additional cleanups after RCU flavor consolidation

   - Grace-period forward-progress cleanups and improvements

   - Documentation updates

   - Miscellaneous fixes

   - spin_is_locked() conversions to lockdep

   - SPDX changes to RCU source and header files

   - SRCU updates

   - Torture-test updates, including nolibc updates and moving nolibc to
     tools/include"

* 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (71 commits)
  locking/locktorture: Convert to SPDX license identifier
  linux/torture: Convert to SPDX license identifier
  torture: Convert to SPDX license identifier
  linux/srcu: Convert to SPDX license identifier
  linux/rcutree: Convert to SPDX license identifier
  linux/rcutiny: Convert to SPDX license identifier
  linux/rcu_sync: Convert to SPDX license identifier
  linux/rcu_segcblist: Convert to SPDX license identifier
  linux/rcupdate: Convert to SPDX license identifier
  linux/rcu_node_tree: Convert to SPDX license identifier
  rcu/update: Convert to SPDX license identifier
  rcu/tree: Convert to SPDX license identifier
  rcu/tiny: Convert to SPDX license identifier
  rcu/sync: Convert to SPDX license identifier
  rcu/srcu: Convert to SPDX license identifier
  rcu/rcutorture: Convert to SPDX license identifier
  rcu/rcu_segcblist: Convert to SPDX license identifier
  rcu/rcuperf: Convert to SPDX license identifier
  rcu/rcu.h: Convert to SPDX license identifier
  RCU/torture.txt: Remove section MODULE PARAMETERS
  ...

diff --combined Documentation/admin-guide/kernel-parameters.txt
index bcf2cd519d1e0cef18311f07dc230fdd954636c4,28481510ad4ed2e984c28d2a89ed06a6b838cf49..74dddbf54cd1c737efde911605aa328cbe9f7bfc
--- 1/Documentation/admin-guide/kernel-parameters.txt
--- 2/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@@ -461,11 -461,6 +461,11 @@@
                        possible to determine what the correct size should be.
                        This option provides an override for these situations.
  
 +      carrier_timeout=
 +                      [NET] Specifies amount of time (in seconds) that
 +                      the kernel should wait for a network carrier. By default
 +                      it waits 120 seconds.
 +
        ca_keys=        [KEYS] This parameter identifies a specific key(s) on
                        the system trusted keyring to be used for certificate
                        trust validation.
@@@ -3658,19 -3653,6 +3658,6 @@@
                        latencies, which will choose a value aligned
                        with the appropriate hardware boundaries.
  
-       rcutree.jiffies_till_sched_qs= [KNL]
-                       Set required age in jiffies for a
-                       given grace period before RCU starts
-                       soliciting quiescent-state help from
-                       rcu_note_context_switch().  If not specified, the
-                       kernel will calculate a value based on the most
-                       recent settings of rcutree.jiffies_till_first_fqs
-                       and rcutree.jiffies_till_next_fqs.
-                       This calculated value may be viewed in
-                       rcutree.jiffies_to_sched_qs.  Any attempt to
-                       set rcutree.jiffies_to_sched_qs will be
-                       cheerfully overwritten.
- 
        rcutree.jiffies_till_first_fqs= [KNL]
                        Set delay from grace-period initialization to
                        first attempt to force quiescent states.
@@@ -3682,6 -3664,20 +3669,20 @@@
                        quiescent states.  Units are jiffies, minimum
                        value is one, and maximum value is HZ.
  
+       rcutree.jiffies_till_sched_qs= [KNL]
+                       Set required age in jiffies for a
+                       given grace period before RCU starts
+                       soliciting quiescent-state help from
+                       rcu_note_context_switch() and cond_resched().
+                       If not specified, the kernel will calculate
+                       a value based on the most recent settings
+                       of rcutree.jiffies_till_first_fqs
+                       and rcutree.jiffies_till_next_fqs.
+                       This calculated value may be viewed in
+                       rcutree.jiffies_to_sched_qs.  Any attempt to set
+                       rcutree.jiffies_to_sched_qs will be cheerfully
+                       overwritten.
+ 
        rcutree.kthread_prio=    [KNL,BOOT]
                        Set the SCHED_FIFO priority of the RCU per-CPU
                        kthreads (rcuc/N). This value is also used for
@@@ -3725,6 -3721,11 +3726,11 @@@
                        This wake_up() will be accompanied by a
                        WARN_ONCE() splat and an ftrace_dump().
  
+       rcutree.sysrq_rcu= [KNL]
+                       Commandeer a sysrq key to dump out Tree RCU's
+                       rcu_node tree with an eye towards determining
+                       why a new grace period has not yet started.
+ 
        rcuperf.gp_async= [KNL]
                        Measure performance of asynchronous
                        grace-period primitives such as call_rcu().

diff --combined MAINTAINERS
index fbbb96236d983bf50b6a6d1105a6021d885effc0,65217477b0365824ea6ee0e04687099d7b61027c..ea60bf137aaff81b122409d99a6bc6e65c666361
--- 1/MAINTAINERS
--- 2/MAINTAINERS
+++ b/MAINTAINERS
@@@ -409,7 -409,8 +409,7 @@@ F: drivers/platform/x86/wmi.
  F:    include/uapi/linux/wmi.h
  
  AD1889 ALSA SOUND DRIVER
 -M:    Thibaut Varene <T-Bone@parisc-linux.org>
 -W:    http://wiki.parisc-linux.org/AD1889
 +W:    https://parisc.wiki.kernel.org/index.php/AD1889
  L:    linux-parisc@vger.kernel.org
  S:    Maintained
  F:    sound/pci/ad1889.*
@@@ -2851,7 -2852,7 +2851,7 @@@ R:      Martin KaFai Lau <kafai@fb.com
  R:    Song Liu <songliubraving@fb.com>
  R:    Yonghong Song <yhs@fb.com>
  L:    netdev@vger.kernel.org
 -L:    linux-kernel@vger.kernel.org
 +L:    bpf@vger.kernel.org
  T:    git git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git
  T:    git git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git
  Q:    https://patchwork.ozlabs.org/project/netdev/list/?delegate=77147
@@@ -2881,7 -2882,6 +2881,7 @@@ N:      bp
  BPF JIT for ARM
  M:    Shubham Bansal <illusionist.neo@gmail.com>
  L:    netdev@vger.kernel.org
 +L:    bpf@vger.kernel.org
  S:    Maintained
  F:    arch/arm/net/
  
@@@ -2890,21 -2890,18 +2890,21 @@@ M:   Daniel Borkmann <daniel@iogearbox.ne
  M:    Alexei Starovoitov <ast@kernel.org>
  M:    Zi Shen Lim <zlim.lnx@gmail.com>
  L:    netdev@vger.kernel.org
 +L:    bpf@vger.kernel.org
  S:    Supported
  F:    arch/arm64/net/
  
  BPF JIT for MIPS (32-BIT AND 64-BIT)
  M:    Paul Burton <paul.burton@mips.com>
  L:    netdev@vger.kernel.org
 +L:    bpf@vger.kernel.org
  S:    Maintained
  F:    arch/mips/net/
  
  BPF JIT for NFP NICs
  M:    Jakub Kicinski <jakub.kicinski@netronome.com>
  L:    netdev@vger.kernel.org
 +L:    bpf@vger.kernel.org
  S:    Supported
  F:    drivers/net/ethernet/netronome/nfp/bpf/
  
@@@ -2912,21 -2909,13 +2912,21 @@@ BPF JIT for POWERPC (32-BIT AND 64-BIT
  M:    Naveen N. Rao <naveen.n.rao@linux.ibm.com>
  M:    Sandipan Das <sandipan@linux.ibm.com>
  L:    netdev@vger.kernel.org
 +L:    bpf@vger.kernel.org
  S:    Maintained
  F:    arch/powerpc/net/
  
 +BPF JIT for RISC-V (RV64G)
 +M:    Björn Töpel <bjorn.topel@gmail.com>
 +L:    netdev@vger.kernel.org
 +S:    Maintained
 +F:    arch/riscv/net/
 +
  BPF JIT for S390
  M:    Martin Schwidefsky <schwidefsky@de.ibm.com>
  M:    Heiko Carstens <heiko.carstens@de.ibm.com>
  L:    netdev@vger.kernel.org
 +L:    bpf@vger.kernel.org
  S:    Maintained
  F:    arch/s390/net/
  X:    arch/s390/net/pnet.c
@@@ -2934,14 -2923,12 +2934,14 @@@
  BPF JIT for SPARC (32-BIT AND 64-BIT)
  M:    David S. Miller <davem@davemloft.net>
  L:    netdev@vger.kernel.org
 +L:    bpf@vger.kernel.org
  S:    Maintained
  F:    arch/sparc/net/
  
  BPF JIT for X86 32-BIT
  M:    Wang YanQing <udknight@gmail.com>
  L:    netdev@vger.kernel.org
 +L:    bpf@vger.kernel.org
  S:    Maintained
  F:    arch/x86/net/bpf_jit_comp32.c
  
@@@ -2949,7 -2936,6 +2949,7 @@@ BPF JIT for X86 64-BI
  M:    Alexei Starovoitov <ast@kernel.org>
  M:    Daniel Borkmann <daniel@iogearbox.net>
  L:    netdev@vger.kernel.org
 +L:    bpf@vger.kernel.org
  S:    Supported
  F:    arch/x86/net/
  X:    arch/x86/net/bpf_jit_comp32.c
@@@ -3404,8 -3390,9 +3404,8 @@@ F:      Documentation/media/v4l-drivers/cafe
  F:    drivers/media/platform/marvell-ccic/
  
  CAIF NETWORK LAYER
 -M:    Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
  L:    netdev@vger.kernel.org
 -S:    Supported
 +S:    Orphan
  F:    Documentation/networking/caif/
  F:    drivers/net/caif/
  F:    include/uapi/linux/caif/
@@@ -3529,6 -3516,7 +3529,6 @@@ F:      include/linux/spi/cc2520.
  F:    Documentation/devicetree/bindings/net/ieee802154/cc2520.txt
  
  CCREE ARM TRUSTZONE CRYPTOCELL REE DRIVER
 -M:    Yael Chemla <yael.chemla@foss.arm.com>
  M:    Gilad Ben-Yossef <gilad@benyossef.com>
  L:    linux-crypto@vger.kernel.org
  S:    Supported
@@@ -4140,7 -4128,7 +4140,7 @@@ S:      Maintaine
  F:    drivers/media/dvb-frontends/cxd2820r*
  
  CXGB3 ETHERNET DRIVER (CXGB3)
 -M:    Arjun Vynipadath <arjun@chelsio.com>
 +M:    Vishal Kulkarni <vishal@chelsio.com>
  L:    netdev@vger.kernel.org
  W:    http://www.chelsio.com
  S:    Supported
@@@ -4169,7 -4157,7 +4169,7 @@@ S:      Supporte
  F:    drivers/crypto/chelsio
  
  CXGB4 ETHERNET DRIVER (CXGB4)
 -M:    Arjun Vynipadath <arjun@chelsio.com>
 +M:    Vishal Kulkarni <vishal@chelsio.com>
  L:    netdev@vger.kernel.org
  W:    http://www.chelsio.com
  S:    Supported
@@@ -6041,12 -6029,6 +6041,12 @@@ L:    linuxppc-dev@lists.ozlabs.or
  S:    Maintained
  F:    drivers/dma/fsldma.*
  
 +FREESCALE ENETC ETHERNET DRIVERS
 +M:    Claudiu Manoil <claudiu.manoil@nxp.com>
 +L:    netdev@vger.kernel.org
 +S:    Maintained
 +F:    drivers/net/ethernet/freescale/enetc/
 +
  FREESCALE eTSEC ETHERNET DRIVER (GIANFAR)
  M:    Claudiu Manoil <claudiu.manoil@nxp.com>
  L:    netdev@vger.kernel.org
@@@ -6110,17 -6092,15 +6110,17 @@@ FREESCALE QORIQ PTP CLOCK DRIVE
  M:    Yangbo Lu <yangbo.lu@nxp.com>
  L:    netdev@vger.kernel.org
  S:    Maintained
 +F:    drivers/net/ethernet/freescale/enetc/enetc_ptp.c
  F:    drivers/ptp/ptp_qoriq.c
 +F:    drivers/ptp/ptp_qoriq_debugfs.c
  F:    include/linux/fsl/ptp_qoriq.h
  F:    Documentation/devicetree/bindings/ptp/ptp-qoriq.txt
  
  FREESCALE QUAD SPI DRIVER
  M:    Han Xu <han.xu@nxp.com>
 -L:    linux-mtd@lists.infradead.org
 +L:    linux-spi@vger.kernel.org
  S:    Maintained
 -F:    drivers/mtd/spi-nor/fsl-quadspi.c
 +F:    drivers/spi/spi-fsl-qspi.c
  
  FREESCALE QUICC ENGINE LIBRARY
  M:    Qiang Zhao <qiang.zhao@nxp.com>
@@@ -6171,7 -6151,7 +6171,7 @@@ FREESCALE SOC SOUND DRIVER
  M:    Timur Tabi <timur@kernel.org>
  M:    Nicolin Chen <nicoleotsuka@gmail.com>
  M:    Xiubo Li <Xiubo.Lee@gmail.com>
 -R:    Fabio Estevam <fabio.estevam@nxp.com>
 +R:    Fabio Estevam <festevam@gmail.com>
  L:    alsa-devel@alsa-project.org (moderated for non-subscribers)
  L:    linuxppc-dev@lists.ozlabs.org
  S:    Maintained
@@@ -7189,7 -7169,6 +7189,7 @@@ F:      drivers/i2c/i2c-stub.
  I3C SUBSYSTEM
  M:    Boris Brezillon <bbrezillon@kernel.org>
  L:    linux-i3c@lists.infradead.org
 +C:    irc://chat.freenode.net/linux-i3c
  T:    git git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux.git
  S:    Maintained
  F:    Documentation/ABI/testing/sysfs-bus-i3c
@@@ -8508,7 -8487,6 +8508,7 @@@ L7 BPF FRAMEWOR
  M:    John Fastabend <john.fastabend@gmail.com>
  M:    Daniel Borkmann <daniel@iogearbox.net>
  L:    netdev@vger.kernel.org
 +L:    bpf@vger.kernel.org
  S:    Maintained
  F:    include/linux/skmsg.h
  F:    net/core/skmsg.c
@@@ -9880,13 -9858,6 +9880,13 @@@ F:    drivers/media/platform/meson/ao-cec.
  F:    Documentation/devicetree/bindings/media/meson-ao-cec.txt
  T:    git git://linuxtv.org/media_tree.git
  
 +MESON NAND CONTROLLER DRIVER FOR AMLOGIC SOCS
 +M:    Liang Yang <liang.yang@amlogic.com>
 +L:    linux-mtd@lists.infradead.org
 +S:    Maintained
 +F:    drivers/mtd/nand/raw/meson_*
 +F:    Documentation/devicetree/bindings/mtd/amlogic,meson-nand.txt
 +
  MICROBLAZE ARCHITECTURE
  M:    Michal Simek <monstr@monstr.eu>
  W:    http://www.monstr.eu/fdt/
@@@ -10611,7 -10582,6 +10611,7 @@@ F:   Documentation/devicetree/bindings/ne
  F:    net/dsa/
  F:    include/net/dsa.h
  F:    include/linux/dsa/
 +F:    include/linux/platform_data/dsa.h
  F:    drivers/net/dsa/
  
  NETWORKING [GENERAL]
@@@ -10827,6 -10797,12 +10827,12 @@@ F: drivers/power/supply/bq27xxx_battery
  F:    drivers/power/supply/isp1704_charger.c
  F:    drivers/power/supply/rx51_battery.c
  
+ NOLIBC HEADER FILE
+ M:    Willy Tarreau <w@1wt.eu>
+ S:    Maintained
+ T:    git git://git.kernel.org/pub/scm/linux/kernel/git/wtarreau/nolibc.git
+ F:    tools/include/nolibc/
+ 
  NTB AMD DRIVER
  M:    Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
  L:    linux-ntb@googlegroups.com
@@@ -10928,7 -10904,7 +10934,7 @@@ F:   include/linux/nvmem-consumer.
  F:    include/linux/nvmem-provider.h
  
  NXP SGTL5000 DRIVER
 -M:    Fabio Estevam <fabio.estevam@nxp.com>
 +M:    Fabio Estevam <festevam@gmail.com>
  L:    alsa-devel@alsa-project.org (moderated for non-subscribers)
  S:    Maintained
  F:    Documentation/devicetree/bindings/sound/sgtl5000.txt
@@@ -10966,14 -10942,6 +10972,14 @@@ F: lib/objagg.
  F:    lib/test_objagg.c
  F:    include/linux/objagg.h
  
 +NXP FSPI DRIVER
 +R:    Yogesh Gaur <yogeshgaur.83@gmail.com>
 +M:    Ashish Kumar <ashish.kumar@nxp.com>
 +L:    linux-spi@vger.kernel.org
 +S:    Maintained
 +F:    drivers/spi/spi-nxp-fspi.c
 +F:    Documentation/devicetree/bindings/spi/spi-nxp-fspi.txt
 +
  OBJTOOL
  M:    Josh Poimboeuf <jpoimboe@redhat.com>
  M:    Peter Zijlstra <peterz@infradead.org>
@@@ -11526,7 -11494,7 +11532,7 @@@ F:   Documentation/blockdev/paride.tx
  F:    drivers/block/paride/
  
  PARISC ARCHITECTURE
 -M:    "James E.J. Bottomley" <jejb@parisc-linux.org>
 +M:    "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
  M:    Helge Deller <deller@gmx.de>
  L:    linux-parisc@vger.kernel.org
  W:    http://www.parisc-linux.org/
@@@ -12654,14 -12622,6 +12660,14 @@@ L: netdev@vger.kernel.or
  S:    Maintained
  F:    drivers/net/ethernet/qualcomm/emac/
  
 +QUALCOMM ETHQOS ETHERNET DRIVER
 +M:    Vinod Koul <vkoul@kernel.org>
 +M:    Niklas Cassel <niklas.cassel@linaro.org>
 +L:    netdev@vger.kernel.org
 +S:    Maintained
 +F:    drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
 +F:    Documentation/devicetree/bindings/net/qcom,dwmac.txt
 +
  QUALCOMM GENERIC INTERFACE I2C DRIVER
  M:    Alok Chauhan <alokc@codeaurora.org>
  M:    Karthikeyan Ramasubramanian <kramasub@codeaurora.org>
@@@ -13646,18 -13606,11 +13652,18 @@@ F:        drivers/mmc/host/sdhci-brcmstb
  SECURE DIGITAL HOST CONTROLLER INTERFACE (SDHCI) DRIVER
  M:    Adrian Hunter <adrian.hunter@intel.com>
  L:    linux-mmc@vger.kernel.org
 -T:    git git://git.infradead.org/users/ahunter/linux-sdhci.git
  S:    Maintained
  F:    drivers/mmc/host/sdhci*
  F:    include/linux/mmc/sdhci*
  
 +EMMC CMDQ HOST CONTROLLER INTERFACE (CQHCI) DRIVER
 +M:    Adrian Hunter <adrian.hunter@intel.com>
 +M:    Ritesh Harjani <riteshh@codeaurora.org>
 +M:    Asutosh Das <asutoshd@codeaurora.org>
 +L:    linux-mmc@vger.kernel.org
 +S:    Maintained
 +F:    drivers/mmc/host/cqhci*
 +
  SYNOPSYS SDHCI COMPLIANT DWC MSHC DRIVER
  M:    Prabu Thangamuthu <prabu.t@synopsys.com>
  M:    Manjunath M B <manjumb@synopsys.com>
@@@ -13793,7 -13746,6 +13799,7 @@@ F:   drivers/misc/sgi-xp
  
  SHARED MEMORY COMMUNICATIONS (SMC) SOCKETS
  M:    Ursula Braun <ubraun@linux.ibm.com>
 +M:    Karsten Graul <kgraul@linux.ibm.com>
  L:    linux-s390@vger.kernel.org
  W:    http://www.ibm.com/developerworks/linux/linux390/
  S:    Supported
@@@ -14385,7 -14337,6 +14391,7 @@@ F:   arch/arm/mach-spear
  
  SPI NOR SUBSYSTEM
  M:    Marek Vasut <marek.vasut@gmail.com>
 +M:    Tudor Ambarus <tudor.ambarus@microchip.com>
  L:    linux-mtd@lists.infradead.org
  W:    http://www.linux-mtd.infradead.org/
  Q:    http://patchwork.ozlabs.org/project/linux-mtd/list/
@@@ -16769,7 -16720,6 +16775,7 @@@ M:   Jesper Dangaard Brouer <hawk@kernel.
  M:    John Fastabend <john.fastabend@gmail.com>
  L:    netdev@vger.kernel.org
  L:    xdp-newbies@vger.kernel.org
 +L:    bpf@vger.kernel.org
  S:    Supported
  F:    net/core/xdp.c
  F:    include/net/xdp.h
@@@ -16783,7 -16733,6 +16789,7 @@@ XDP SOCKETS (AF_XDP
  M:    Björn Töpel <bjorn.topel@intel.com>
  M:    Magnus Karlsson <magnus.karlsson@intel.com>
  L:    netdev@vger.kernel.org
 +L:    bpf@vger.kernel.org
  S:    Maintained
  F:    kernel/bpf/xskmap.c
  F:    net/xdp/

diff --combined kernel/time/timer.c
index 167e71f9ed3c54ec151fdfb2efeae52593f8f4e0,6eb7cc4b6d52608a3704d6941f9c1d2bd881f49e..2fce056f8a49551bf565fca46e4e1ffbb2dad74a
--- 1/kernel/time/timer.c
--- 2/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@@ -647,7 -647,7 +647,7 @@@ static bool timer_fixup_activate(void *
  
        case ODEBUG_STATE_ACTIVE:
                WARN_ON(1);
 -
 +              /* fall through */
        default:
                return false;
        }
@@@ -1632,7 -1632,7 +1632,7 @@@ void update_process_times(int user_tick
        /* Note: this timer irq context must be accounted for as well. */
        account_process_tick(p, user_tick);
        run_local_timers();
-       rcu_check_callbacks(user_tick);
+       rcu_sched_clock_irq(user_tick);
  #ifdef CONFIG_IRQ_WORK
        if (in_irq())
                irq_work_tick();

diff --combined virt/kvm/kvm_main.c
index 076bc38963bf68d36733e4674a1f433a974de047,38df17b7760e26e0171f47337e9ed92ce82322c8..d237d3350a99c8055999544500f5a0e8fcd3ed93
--- 1/virt/kvm/kvm_main.c
--- 2/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@@ -4044,7 -4044,7 +4044,7 @@@ static void kvm_uevent_notify_change(un
        }
        add_uevent_var(env, "PID=%d", kvm->userspace_pid);
  
 -      if (kvm->debugfs_dentry) {
 +      if (!IS_ERR_OR_NULL(kvm->debugfs_dentry)) {
                char *tmp, *p = kmalloc(PATH_MAX, GFP_KERNEL);
  
                if (p) {
@@@ -4084,7 -4084,7 +4084,7 @@@ static int kvm_suspend(void
  static void kvm_resume(void)
  {
        if (kvm_usage_count) {
-               WARN_ON(raw_spin_is_locked(&kvm_count_lock));
+               lockdep_assert_held(&kvm_count_lock);
                hardware_enable_nolock(NULL);
        }
  }