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linux-stable/kernel
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Paul E. McKenney 0607ba8403 srcu: Prevent __call_srcu() counter wrap with read-side critical section 
Ever since cdf7abc4610a ("srcu: Allow use of Tiny/Tree SRCU from
both process and interrupt context"), it has been permissible
to use SRCU read-side critical sections in interrupt context.
This allows __call_srcu() to use SRCU read-side critical sections to
prevent a new SRCU grace period from ending before the call to either
srcu_funnel_gp_start() or srcu_funnel_exp_start completes, thus preventing
SRCU grace-period counter overflow during that time.

Note that this does not permit removal of the counter-wrap checks in
srcu_gp_end().  These check are necessary to handle the case where
a given CPU does not interact at all with SRCU for an extended time
period.

This commit therefore adds an SRCU read-side critical section to
__call_srcu() in order to prevent grace period counter wrap during
the funnel-locking process.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2018-11-08 21:54:14 -08:00
..
bpf
bpf: don't set id on after map lookup with ptr_to_map_val return
2018-10-31 16:53:17 -07:00
cgroup
for-linus-20181102
2018-11-02 11:25:48 -07:00
configs
kvm_config: add CONFIG_VIRTIO_MENU
2018-10-24 20:55:56 -04:00
debug
sched: loadavg: consolidate LOAD_INT, LOAD_FRAC, CALC_LOAD
2018-10-26 16:26:32 -07:00
dma
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
events
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-11-03 18:13:43 -07:00
gcov
gcov: remove CONFIG_GCOV_FORMAT_AUTODETECT
2018-06-08 18:56:02 +09:00
irq
irq/matrix: Fix memory overallocation
2018-11-01 10:00:38 +01:00
livepatch
Merge branch 'for-4.19/upstream' into for-linus
2018-08-20 18:33:50 +02:00
locking
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
power
memblock: stop using implicit alignment to SMP_CACHE_BYTES
2018-10-31 08:54:16 -07:00
printk
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
rcu
srcu: Prevent __call_srcu() counter wrap with read-side critical section
2018-11-08 21:54:14 -08:00
sched
Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-11-03 18:37:09 -07:00
time
compat: Cleanup in_compat_syscall() callers
2018-11-01 13:02:21 +01:00
trace
for-linus-20181102
2018-11-02 11:25:48 -07:00
.gitignore
…
acct.c
kernel/acct.c: fix the acct->needcheck check in check_free_space()
2018-01-04 16:45:09 -08:00
async.c
kernel/async.c: revert "async: simplify lowest_in_progress()"
2018-02-06 18:32:44 -08:00
audit_fsnotify.c
fsnotify: add fsnotify_add_inode_mark() wrappers
2018-05-18 14:58:22 +02:00
audit_tree.c
\n
2018-08-17 09:41:28 -07:00
audit_watch.c
audit: fix use-after-free in audit_add_watch
2018-07-18 11:43:36 -04:00
audit.c
audit: use ktime_get_coarse_real_ts64() for timestamps
2018-07-17 14:45:08 -04:00
audit.h
audit: track the owner of the command mutex ourselves
2018-02-23 11:22:22 -05:00
auditfilter.c
audit: rename FILTER_TYPE to FILTER_EXCLUDE
2018-06-19 10:39:54 -04:00
auditsc.c
audit/stable-4.18 PR 20180814
2018-08-15 10:46:54 -07:00
backtracetest.c
…
bounds.c
kbuild: fix kernel/bounds.c 'W=1' warning
2018-10-31 08:54:14 -07:00
capability.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
compat.c
y2038: globally rename compat_time to old_time32
2018-08-27 14:48:48 +02:00
configs.c
…
context_tracking.c
…
cpu_pm.c
PM / CPU: replace raw_notifier with atomic_notifier
2017-07-31 13:09:49 +02:00
cpu.c
Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-10-23 18:43:04 +01:00
crash_core.c
kernel/crash_core.c: print timestamp using time64_t
2018-08-22 10:52:47 -07:00
crash_dump.c
…
cred.c
…
delayacct.c
delayacct: track delays from thrashing cache pages
2018-10-26 16:26:32 -07:00
dma.c
proc: introduce proc_create_single{,_data}
2018-05-16 07:23:35 +02:00
elfcore.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
exec_domain.c
proc: introduce proc_create_single{,_data}
2018-05-16 07:23:35 +02:00
exit.c
signal: Pass pid type into group_send_sig_info
2018-07-21 12:57:35 -05:00
extable.c
extable: Make init_kernel_text() global
2018-02-21 16:54:06 +01:00
fail_function.c
kernel/fail_function.c: remove meaningless null pointer check before debugfs_remove_recursive
2018-10-31 08:54:12 -07:00
fork.c
New gcc plugin: stackleak
2018-11-01 11:46:27 -07:00
freezer.c
PM / reboot: Eliminate race between reboot and suspend
2018-08-06 12:35:20 +02:00
futex_compat.c
y2038: globally rename compat_time to old_time32
2018-08-27 14:48:48 +02:00
futex.c
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
groups.c
kernel: make groups_sort calling a responsibility group_info allocators
2017-12-14 16:00:49 -08:00
hung_task.c
kernel: hung_task.c: disable on suspend
2018-10-25 18:45:08 +02:00
iomem.c
memremap: split devm_memremap_pages() and memremap() infrastructure
2018-05-15 23:08:33 -07:00
irq_work.c
irq/work: Improve the flag definitions
2018-01-08 19:43:15 +01:00
jump_label.c
Merge branch 'x86/build' into locking/core, to pick up dependent patches and unify jump-label work
2018-10-16 17:30:11 +02:00
kallsyms.c
kallsyms: reduce size a little on 64-bit
2018-09-10 22:54:33 +09:00
kcmp.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
…
Kconfig.preempt
kconfig: include kernel/Kconfig.preempt from init/Kconfig
2018-08-02 08:06:54 +09:00
kcov.c
sched/core / kcov: avoid kcov_area during task switch
2018-06-15 07:55:24 +09:00
kexec_core.c
kexec: Allocate decrypted control pages for kdump if SME is enabled
2018-10-06 12:01:51 +02:00
kexec_file.c
kernel/kexec_file.c: remove some duplicated includes
2018-11-03 10:09:37 -07:00
kexec_internal.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
kexec.c
kexec: add call to LSM hook in original kexec_load syscall
2018-07-16 12:31:57 -07:00
kmod.c
kmod: move #ifdef CONFIG_MODULES wrapper to Makefile
2017-09-08 18:26:51 -07:00
kprobes.c
kprobes: Don't call BUG_ON() if there is a kprobe in use on free list
2018-09-12 08:01:16 +02:00
ksysfs.c
kexec: move vmcoreinfo out of the kernel's .bss section
2017-07-12 16:25:59 -07:00
kthread.c
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-08-13 11:25:07 -07:00
latencytop.c
…
Makefile
x86/entry: Add STACKLEAK erasing the kernel stack at the end of syscalls
2018-09-04 10:35:47 -07:00
memremap.c
Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax
2018-10-28 11:35:40 -07:00
module_signing.c
modsign: log module name in the event of an error
2018-07-02 11:36:17 +02:00
module-internal.h
modsign: log module name in the event of an error
2018-07-02 11:36:17 +02:00
module.c
jump_table: Move entries into ro_after_init region
2018-09-27 17:56:49 +02:00
notifier.c
…
nsproxy.c
…
padata.c
padata: add SPDX identifier
2018-01-05 18:43:00 +11:00
panic.c
kernel/panic.c: filter out a potential trailing newline
2018-10-31 08:54:14 -07:00
params.c
kernel/params.c: downgrade warning for unsafe parameters
2018-04-11 10:28:37 -07:00
pid_namespace.c
signal: Use group_send_sig_info to kill all processes in a pid namespace
2018-09-16 16:08:25 +02:00
pid.c
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
profile.c
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
ptrace.c
Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2018-10-24 11:22:39 +01:00
range.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
reboot.c
kernel/reboot.c: export pm_power_off_prepare
2018-09-11 16:13:24 +01:00
relay.c
kernel/relay.c: change return type to vm_fault_t
2018-06-15 07:55:24 +09:00
resource.c
resource: Clean it up a bit
2018-10-09 17:25:58 +02:00
rseq.c
rseq: uapi: Declare rseq_cs field as union, update includes
2018-07-10 22:18:52 +02:00
seccomp.c
Merge branch 'next-general' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2018-10-24 11:49:35 +01:00
signal.c
kernel/signal.c: fix a comment error
2018-10-31 08:54:14 -07:00
smp.c
smp,cpumask: introduce on_each_cpu_cond_mask
2018-10-09 16:51:11 +02:00
smpboot.c
smpboot: Remove cpumask from the API
2018-07-03 09:20:44 +02:00
smpboot.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
softirq.c
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-10-25 11:43:47 -07:00
stackleak.c
stackleak: Allow runtime disabling of kernel stack erasing
2018-09-04 10:35:48 -07:00
stacktrace.c
…
stop_machine.c
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-08-13 11:25:07 -07:00
sys_ni.c
Merge branch 'core-rseq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-06-10 10:17:09 -07:00
sys.c
kernel/sys.c: remove duplicated include
2018-09-20 22:01:11 +02:00
sysctl_binary.c
staging: irda: remove remaining remants of irda code removal
2018-04-16 11:26:49 +02:00
sysctl.c
kernel/sysctl.c: remove duplicated include
2018-11-03 10:09:37 -07:00
task_work.c
locking/barriers: Convert users of lockless_dereference() to READ_ONCE()
2017-12-17 13:57:15 +01:00
taskstats.c
pids: introduce find_get_task_by_vpid() helper
2018-02-06 18:32:46 -08:00
test_kprobes.c
kprobes: Remove jprobe API implementation
2018-06-21 12:33:05 +02:00
torture.c
rcutorture: Check GP completion at stutter end
2018-08-29 09:20:48 -07:00
tracepoint.c
tracepoint: Fix tracepoint array element size mismatch
2018-10-17 15:35:29 -04:00
tsacct.c
…
ucount.c
headers: untangle kmemleak.h from mm.h
2018-04-05 21:36:27 -07:00
uid16.c
fs: add do_fchownat(), ksys_fchown() helpers and ksys_{,l}chown() wrappers
2018-04-02 20:15:59 +02:00
uid16.h
kernel: provide ksys_*() wrappers for syscalls called by kernel/uid16.c
2018-04-02 20:15:30 +02:00
umh.c
umh: Add command line to user mode helpers
2018-10-22 19:37:36 -07:00
up.c
smp,cpumask: introduce on_each_cpu_cond_mask
2018-10-09 16:51:11 +02:00
user_namespace.c
userns: move user access out of the mutex
2018-08-11 02:05:53 -05:00
user-return-notifier.c
…
user.c
userns: use irqsave variant of refcount_dec_and_lock()
2018-08-22 10:52:47 -07:00
utsname_sysctl.c
sys: don't hold uts_sem while accessing userspace memory
2018-08-11 02:05:53 -05:00
utsname.c
uts: create "struct uts_namespace" from kmem_cache
2018-04-11 10:28:35 -07:00
watchdog_hld.c
watchdog: Mark watchdog touch functions as notrace
2018-08-30 12:56:40 +02:00
watchdog.c
watchdog: Mark watchdog touch functions as notrace
2018-08-30 12:56:40 +02:00
workqueue_internal.h
workqueue: Set worker->desc to workqueue name by default
2018-05-18 08:47:13 -07:00
workqueue.c
watchdog: Mark watchdog touch functions as notrace
2018-08-30 12:56:40 +02:00