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Subject[GIT PULL rcu/next] RCU commits for 4.21/5.0
Hello, Ingo,

This pull request contains the following changes:

1. Convert RCU's BUG_ON() and similar calls to WARN_ON() and similar.

http://lkml.kernel.org/r/20181111193156.GA3666@linux.ibm.com

2. Replace of calls to RCU-bh and RCU-sched update-side functions
to their vanilla RCU counterparts. This series is a step
towards complete removal of the RCU-bh and RCU-sched update-side
functions.

http://lkml.kernel.org/r/20181111194104.GA4787@linux.ibm.com

Note that several of the patches sent out have been dropped from
this series due to having been pulled in by their respective
maintainers.

3. Documentation updates, including a number of flavor-consolidation
updates from Joel Fernandes.

http://lkml.kernel.org/r/20181111195619.GA6958@linux.ibm.com

4. Miscellaneous fixes.

http://lkml.kernel.org/r/20181111192839.GA32144@linux.ibm.com

5. Automate generation of the initrd filesystem used for
rcutorture testing.

http://lkml.kernel.org/r/20181111200127.GA9511@linux.ibm.com

6. Convert spin_is_locked() assertions to instead use lockdep.

http://lkml.kernel.org/r/20181111200421.GA10551@linux.ibm.com

Note that several of the patches sent out have been dropped from
this series due to having been pulled in by their respective
maintainers.

7. SRCU updates, especially including a fix from Dennis Krein
for a bag-on-head-class bug.

http://lkml.kernel.org/r/20181111200834.GA10983@linux.ibm.com

8. RCU torture-test updates.

http://lkml.kernel.org/r/20181111201956.GA11935@linux.ibm.com

All of these changes have been subjected to 0day Test Robot and -next
testing, and are available in the git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git for-mingo

for you to fetch changes up to 5ac7cdc29897e5fc3f5e214f3f8c8b03ef8d7029:

rcutorture: Don't do busted forward-progress testing (2018-12-01 12:45:42 -0800)

----------------------------------------------------------------
Connor Shu (1):
rcutorture: Automatically create initrd directory

Dennis Krein (1):
srcu: Lock srcu_data structure in srcu_gp_start()

Joe Perches (1):
checkpatch: Create table of obsolete APIs and apply to RCU

Joel Fernandes (Google) (19):
rcu: Remove unused rcu_state externs
rcu: Fix rcu_{node,data} comments about gp_seq_needed
doc: Clarify RCU data-structure comment about rcu_tree fanout
doc: Remove rcu_preempt_state reference in stallwarn
doc: Update information about resched_cpu
doc: Remove rcu_dynticks from Data-Structures
doc: rcu: Update Data-Structures for RCU flavor consolidation
doc: rcu: Better clarify the rcu_segcblist ->len field
doc: rcu: Update description of gp_seq fields in rcu_data
doc: rcu: Update core and full API in whatisRCU
doc: rcu: Add more rationale for using rcu_read_lock_sched in checklist
doc: rcu: Remove obsolete suggestion from checklist
doc: rcu: Remove obsolete checklist item about synchronize_rcu usage
doc: rcu: Encourage use of rcu_barrier in checklist
doc: Make reader aware of rcu_dereference_protected
doc: Remove obsolete (non-)requirement about disabling preemption
doc: Make listing in RCU perf/scale requirements use rcu_assign_pointer()
doc: Correct parameter in stallwarn
doc: Fix "struction" typo in RCU memory-ordering documentation

Lance Roy (7):
x86/PCI: Replace spin_is_locked() with lockdep
sfc: Replace spin_is_locked() with lockdep
smsc: Replace spin_is_locked() with lockdep
userfaultfd: Replace spin_is_locked() with lockdep
locking/mutex: Replace spin_is_locked() with lockdep
mm: Replace spin_is_locked() with lockdep
KVM: arm/arm64: vgic: Replace spin_is_locked() with lockdep

Paul E. McKenney (77):
rcu: Eliminate BUG_ON() for sync.c
rcu: Eliminate BUG_ON() for kernel/rcu/tree.c
rcu: Eliminate synchronize_rcu_mult()
rcu: Consolidate the RCU update functions invoked by sync.c
sched/membarrier: Replace synchronize_sched() with synchronize_rcu()
sparc/oprofile: Convert timer_stop() to use synchronize_rcu()
s390/mm: Convert tlb_table_flush() to use call_rcu()
powerpc: Convert hugepd_free() to use call_rcu()
doc: Set down forward-progress requirements
rcutorture: Add initrd support for systems lacking dracut
rcutorture: Make initrd/init execute in userspace
rcutorture: Add cross-compile capability to initrd.sh
srcu: Prevent __call_srcu() counter wrap with read-side critical section
rcu: Stop expedited grace periods from relying on stop-machine
rcu: Eliminate BUG_ON() for kernel/rcu/tree_plugin.h
rcu: Eliminate BUG_ON() for kernel/rcu/update.c
doc: Document rcutorture forward-progress test kernel parameters
doc: RCU scheduler spinlock rcu_read_unlock() restriction remains
MAINTAINERS: Update from @linux.vnet.ibm.com to @linux.ibm.com
rcu: Avoid double multiply by HZ
rcu: Parameterize rcu_check_gp_start_stall()
rcu: Add state name to show_rcu_gp_kthreads() output
rcu: Add jiffies-since-GP-activity to show_rcu_gp_kthreads()
rcu: Trace end of grace period before end of grace period
rcu: Speed up expedited GPs when interrupting RCU reader
rcu: Replace this_cpu_ptr() with __this_cpu_read()
rcu: Avoid signed integer overflow in rcu_preempt_deferred_qs()
MAINTAINERS: Add Joel Fernandes as RCU reviewer
checkpatch.pl: Suggest lockdep instead of asserting !spin_is_locked()
crypto/pcrypt: Replace synchronize_rcu_bh() with synchronize_rcu()
drivers/ipmi: Replace synchronize_sched() with synchronize_rcu()
ethernet/sis: Replace synchronize_sched() with synchronize_rcu()
ethernet/realtek: Replace synchronize_sched() with synchronize_rcu()
drivers/vhost: Replace synchronize_rcu_bh() with synchronize_rcu()
cpufreq/intel_pstate: Replace synchronize_sched() with synchronize_rcu()
cpufreq/cpufreq_governor: Replace synchronize_sched() with synchronize_rcu()
fs/file: Replace synchronize_sched() with synchronize_rcu()
tracing: Replace synchronize_sched() and call_rcu_sched()
main: Replace rcu_barrier_sched() with rcu_barrier()
kprobes: Replace synchronize_sched() with synchronize_rcu()
lockdep: Replace synchronize_sched() with synchronize_rcu()
sched/membarrier: synchronize_sched() with synchronize_rcu()
modules: Replace synchronize_sched() and call_rcu_sched()
workqueue: Replace call_rcu_sched() with call_rcu()
events: Replace synchronize_sched() with synchronize_rcu()
percpu-refcount: Replace call_rcu_sched() with call_rcu()
slab: Replace synchronize_sched() with synchronize_rcu()
mm: Replace call_rcu_sched() with call_rcu()
srcu: Use "ssp" instead of "sp" for srcu_struct pointer
net/sched: Replace call_rcu_bh() and rcu_barrier_bh()
net/core: Replace call_rcu_bh() and synchronize_rcu_bh()
net/bridge: Replace call_rcu_bh() and rcu_barrier_bh()
percpu-rwsem: Replace synchronize_sched() with synchronize_rcu()
types: Remove call_rcu_bh() and call_rcu_sched()
cgroups: Replace synchronize_sched() with synchronize_rcu()
livepatch: Replace synchronize_sched() with synchronize_rcu()
net/core/skmsg: Replace call_rcu_sched() with call_rcu()
net/decnet: Replace rcu_barrier_bh() with rcu_barrier()
tools/kernel.h: Replace synchronize_sched() with synchronize_rcu()
rcutorture/formal: Replace synchronize_sched() with synchronize_rcu()
Merge branches 'bug.2018.11.12a', 'consolidate.2018.12.01a', 'doc.2018.11.12a', 'fixes.2018.11.12a', 'initrd.2018.11.08b', 'sil.2018.11.12a' and 'srcu.2018.11.27a' into HEAD
rcutorture: Add call_rcu() flooding forward-progress tests
torture: Bring any extra CPUs online during kernel startup
rcutorture: Remove cbflood facility
rcutorture: Break up too-long rcu_torture_fwd_prog() function
rcutorture: Affinity forward-progress test to avoid housekeeping CPUs
rcutorture: Prepare for asynchronous access to rcu_fwd_startat
rcutorture: Dump grace-period diagnostics upon forward-progress OOM
rcu: Account for nocb-CPU callback counts in RCU CPU stall warnings
rcu: Print per-CPU callback counts for forward-progress failures
rcutorture: Print GP age upon forward-progress failure
rcutorture: Print histogram of CB invocation at OOM time
rcutorture: Print time since GP end upon forward-progress failure
rcutorture: Print forward-progress test age upon failure
rcutorture: Recover from OOM during forward-progress tests
rcutorture: Use 100ms buckets for forward-progress callback histograms
rcutorture: Don't do busted forward-progress testing

Pierce Griffiths (1):
torture: Remove unnecessary "ret" variables

Randy Dunlap (1):
srcu: Fix kernel-doc missing notation

Willy Tarreau (4):
rcutorture: Always strip using the cross-compiler
rcutorture: Check initrd/init instead of initrd only
rcutorture: Import a copy of nolibc
rcutorture: Make use of nolibc when available

Zhouyi Zhou (1):
rcu: Adjust the comment of function rcu_is_watching

.../Design/Data-Structures/BigTreeClassicRCUBH.svg | 499 -----
.../Data-Structures/BigTreeClassicRCUBHdyntick.svg | 695 -------
.../Data-Structures/BigTreePreemptRCUBHdyntick.svg | 741 -------
.../BigTreePreemptRCUBHdyntickCB.svg | 834 +++-----
.../Design/Data-Structures/Data-Structures.html | 173 +-
.../RCU/Design/Data-Structures/blkd_task.svg | 676 +++---
.../Expedited-Grace-Periods.html | 6 +-
.../Memory-Ordering/Tree-RCU-Memory-Ordering.html | 2 +-
.../RCU/Design/Requirements/Requirements.html | 206 +-
Documentation/RCU/checklist.txt | 49 +-
Documentation/RCU/stallwarn.txt | 7 +-
Documentation/RCU/whatisRCU.txt | 70 +-
Documentation/admin-guide/kernel-parameters.txt | 35 +-
MAINTAINERS | 73 +-
arch/powerpc/mm/hugetlbpage.c | 2 +-
arch/s390/mm/pgalloc.c | 2 +-
arch/sparc/oprofile/init.c | 2 +-
arch/x86/pci/i386.c | 2 +-
crypto/pcrypt.c | 2 +-
drivers/char/ipmi/ipmi_si_intf.c | 2 +-
drivers/cpufreq/cpufreq_governor.c | 2 +-
drivers/cpufreq/intel_pstate.c | 2 +-
drivers/net/ethernet/realtek/8139too.c | 2 +-
drivers/net/ethernet/realtek/r8169.c | 4 +-
drivers/net/ethernet/sfc/efx.c | 2 +-
drivers/net/ethernet/sis/sis190.c | 2 +-
drivers/net/ethernet/smsc/smsc911x.h | 2 +-
drivers/vhost/net.c | 2 +-
fs/file.c | 2 +-
fs/userfaultfd.c | 2 +-
include/linux/percpu-rwsem.h | 2 +-
include/linux/rcupdate_wait.h | 17 -
include/linux/sched.h | 4 +-
include/linux/srcu.h | 79 +-
include/linux/srcutiny.h | 24 +-
include/linux/srcutree.h | 8 +-
include/linux/tracepoint.h | 2 +-
include/linux/types.h | 4 +-
init/main.c | 6 +-
kernel/cgroup/cgroup.c | 2 +-
kernel/events/core.c | 2 +-
kernel/kprobes.c | 10 +-
kernel/livepatch/patch.c | 4 +-
kernel/livepatch/transition.c | 4 +-
kernel/locking/lockdep.c | 2 +-
kernel/locking/mutex-debug.c | 4 +-
kernel/module.c | 14 +-
kernel/rcu/rcu.h | 4 +
kernel/rcu/rcutorture.c | 389 ++--
kernel/rcu/srcutiny.c | 120 +-
kernel/rcu/srcutree.c | 489 ++---
kernel/rcu/sync.c | 25 +-
kernel/rcu/tree.c | 114 +-
kernel/rcu/tree.h | 18 +-
kernel/rcu/tree_exp.h | 10 +-
kernel/rcu/tree_plugin.h | 81 +-
kernel/rcu/update.c | 9 +-
kernel/sched/core.c | 2 +-
kernel/sched/membarrier.c | 6 +-
kernel/torture.c | 34 +-
kernel/trace/ftrace.c | 24 +-
kernel/trace/ring_buffer.c | 12 +-
kernel/trace/trace.c | 10 +-
kernel/trace/trace_events_filter.c | 4 +-
kernel/trace/trace_kprobe.c | 2 +-
kernel/tracepoint.c | 4 +-
kernel/workqueue.c | 8 +-
lib/percpu-refcount.c | 2 +-
mm/khugepaged.c | 4 +-
mm/mmu_gather.c | 2 +-
mm/slab.c | 4 +-
mm/slab_common.c | 6 +-
mm/swap.c | 3 +-
net/bridge/br_mdb.c | 2 +-
net/bridge/br_multicast.c | 14 +-
net/core/netpoll.c | 4 +-
net/core/skmsg.c | 2 +-
net/decnet/af_decnet.c | 2 +-
net/sched/sch_api.c | 2 +-
net/sched/sch_generic.c | 8 +-
scripts/checkpatch.pl | 35 +
tools/include/linux/kernel.h | 2 +-
tools/testing/selftests/rcutorture/bin/kvm.sh | 8 +
tools/testing/selftests/rcutorture/bin/mkinitrd.sh | 136 ++
tools/testing/selftests/rcutorture/bin/nolibc.h | 2197 ++++++++++++++++++++
tools/testing/selftests/rcutorture/doc/initrd.txt | 99 +-
.../formal/srcu-cbmc/include/linux/types.h | 4 +-
virt/kvm/arm/vgic/vgic.c | 12 +-
88 files changed, 4187 insertions(+), 4014 deletions(-)
delete mode 100644 Documentation/RCU/Design/Data-Structures/BigTreeClassicRCUBH.svg
delete mode 100644 Documentation/RCU/Design/Data-Structures/BigTreeClassicRCUBHdyntick.svg
delete mode 100644 Documentation/RCU/Design/Data-Structures/BigTreePreemptRCUBHdyntick.svg
create mode 100755 tools/testing/selftests/rcutorture/bin/mkinitrd.sh
create mode 100644 tools/testing/selftests/rcutorture/bin/nolibc.h

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