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Jani Nikula 023542f48b relay: allow the use of const callback structs 
None of the relay users require the use of mutable structs for callbacks,
however the relay code does.  Instead of assigning the default callback
for subbuf_start, add a wrapper to conditionally call the client callback
if available, and fall back to default behaviour otherwise.

This lets all relay users make their struct rchan_callbacks const data.

[jani.nikula@intel.com: cleanups, per Christoph]
  Link: https://lkml.kernel.org/r/20201124115412.32402-1-jani.nikula@intel.com

Link: https://lkml.kernel.org/r/cc3ff292e4eb4fdc56bee3d690c7b8e39209cd37.1606153547.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15 22:46:18 -08:00
..
bpf
Networking updates for 5.11
2020-12-15 13:22:29 -08:00
cgroup
Merge branch 'akpm' (patches from Andrew)
2020-12-15 12:53:37 -08:00
configs
Input: gtco - remove driver
2020-12-09 17:47:36 -08:00
debug
smp: Cleanup smp_call_function*()
2020-11-24 16:47:49 +01:00
dma
swiotlb: remove the tbl_dma_addr argument to swiotlb_tbl_map_single
2020-11-02 10:10:39 -05:00
entry
The new preemtible kmap_local() implementation:
2020-12-14 18:35:53 -08:00
events
Perf updates:
2020-12-14 17:34:12 -08:00
gcov
gcov: fix kernel-doc markup issue
2020-12-15 22:46:18 -08:00
irq
Generic interrupt and irqchips subsystem:
2020-12-15 15:03:31 -08:00
kcsan
kcsan: Fix encoding masks and regain address bit
2020-11-06 17:19:26 -08:00
livepatch
kernel/: fix repeated words in comments
2020-10-16 11:11:19 -07:00
locking
A moderate set of locking updates:
2020-12-14 17:27:47 -08:00
power
Power management updates for 5.11-rc1
2020-12-15 16:30:31 -08:00
printk
Scheduler updates:
2020-12-14 18:29:11 -08:00
rcu
Scheduler updates:
2020-12-14 18:29:11 -08:00
sched
Power management updates for 5.11-rc1
2020-12-15 16:30:31 -08:00
time
Scheduler updates:
2020-12-14 18:29:11 -08:00
trace
Networking updates for 5.11
2020-12-15 13:22:29 -08:00
.gitignore
…
acct.c
kernel/acct.c: use #elif instead of #end and #elif
2020-12-15 22:46:15 -08:00
async.c
treewide: Remove uninitialized_var() usage
2020-07-16 12:35:15 -07:00
audit_fsnotify.c
fsnotify: create method handle_inode_event() in fsnotify_operations
2020-07-27 23:25:50 +02:00
audit_tree.c
\n
2020-08-06 19:29:51 -07:00
audit_watch.c
fsnotify: create method handle_inode_event() in fsnotify_operations
2020-07-27 23:25:50 +02:00
audit.c
audit: Remove redundant null check
2020-08-26 09:10:39 -04:00
audit.h
audit: change unnecessary globals into statics
2020-08-17 20:26:58 -04:00
auditfilter.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
auditsc.c
audit: Migrate to use SYSCALL_WORK flag
2020-11-16 21:53:16 +01:00
backtracetest.c
treewide: Replace DECLARE_TASKLET() with DECLARE_TASKLET_OLD()
2020-07-30 11:15:58 -07:00
bounds.c
…
capability.c
LSM: Signal to SafeSetID when setting group IDs
2020-10-13 09:17:34 -07:00
compat.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
configs.c
…
context_tracking.c
context_tracking: Ensure that the critical path cannot be instrumented
2020-06-11 15:14:36 +02:00
cpu_pm.c
notifier: Fix broken error handling pattern
2020-09-01 09:58:03 +02:00
cpu.c
Scheduler updates:
2020-12-14 18:29:11 -08:00
crash_core.c
kdump: append uts_namespace.name offset to VMCOREINFO
2020-12-15 22:46:18 -08:00
crash_dump.c
…
cred.c
…
delayacct.c
…
dma.c
…
exec_domain.c
…
exit.c
Merge branch 'linus' into sched/core, to resolve semantic conflict
2020-11-27 11:10:50 +01:00
extable.c
…
fail_function.c
fail_function: Remove a redundant mutex unlock
2020-11-19 11:58:16 -08:00
fork.c
Networking updates for 5.11
2020-12-15 13:22:29 -08:00
freezer.c
…
futex.c
Merge branch 'locking/rwsem'
2020-12-09 17:08:45 +01:00
gen_kheaders.sh
…
groups.c
LSM: Signal to SafeSetID when setting group IDs
2020-10-13 09:17:34 -07:00
hung_task.c
kernel/hung_task.c: make type annotations consistent
2020-11-02 12:14:19 -08:00
iomem.c
…
irq_work.c
irq_work: Optimize irq_work_single()
2020-11-24 16:47:49 +01:00
jump_label.c
kernel/: fix repeated words in comments
2020-10-16 11:11:19 -07:00
kallsyms.c
treewide: Convert macro and uses of __section(foo) to __section("foo")
2020-10-25 14:51:49 -07:00
kcmp.c
…
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
…
Kconfig.preempt
…
kcov.c
kernel: make kcov_common_handle consider the current context
2020-11-02 18:00:20 -08:00
kexec_core.c
crypto: sha - split sha.h into sha1.h and sha2.h
2020-11-20 14:45:33 +11:00
kexec_elf.c
…
kexec_file.c
crypto: sha - split sha.h into sha1.h and sha2.h
2020-11-20 14:45:33 +11:00
kexec_internal.h
…
kexec.c
LSM: Introduce kernel_post_load_data() hook
2020-10-05 13:37:03 +02:00
kheaders.c
…
kmod.c
kmod: remove redundant "be an" in the comment
2020-08-12 10:58:01 -07:00
kprobes.c
Merge branch 'linus' into perf/kprobes
2020-11-07 13:18:49 +01:00
ksysfs.c
…
kthread.c
Merge branch 'akpm' (patches from Andrew)
2020-12-15 12:53:37 -08:00
latencytop.c
…
Makefile
ACPI updates for 5.11-rc1
2020-12-15 16:39:06 -08:00
module_signature.c
…
module_signing.c
…
module-internal.h
…
module.c
bpf: Keep module's btf_data_size intact after load
2020-12-03 17:38:20 -08:00
notifier.c
notifier: Fix broken error handling pattern
2020-09-01 09:58:03 +02:00
nsproxy.c
fixes-v5.11
2020-12-14 16:40:27 -08:00
padata.c
padata: fix possible padata_works_lock deadlock
2020-09-04 17:51:55 +10:00
panic.c
panic: don't dump stack twice on warn
2020-11-14 11:26:04 -08:00
params.c
params: Replace zero-length array with flexible-array member
2020-10-29 17:22:59 -05:00
pid_namespace.c
fixes-v5.11
2020-12-14 16:40:27 -08:00
pid.c
fixes-v5.11
2020-12-14 16:40:27 -08:00
profile.c
…
ptrace.c
Merge branch 'akpm' (patches from Andrew)
2020-12-15 12:53:37 -08:00
range.c
kernel.h: split out min()/max() et al. helpers
2020-10-16 11:11:19 -07:00
reboot.c
Merge branches 'pm-sleep', 'pm-acpi', 'pm-domains' and 'powercap'
2020-12-15 15:26:14 +01:00
regset.c
regset: kill ->get()
2020-07-27 14:31:12 -04:00
relay.c
relay: allow the use of const callback structs
2020-12-15 22:46:18 -08:00
resource_kunit.c
resource: provide meaningful MODULE_LICENSE() in test suite
2020-11-25 18:52:35 +01:00
resource.c
resource: Simplify region_intersects() by reducing conditionals
2020-11-17 18:06:28 +01:00
rseq.c
…
scftorture.c
scftorture: Add full-test stutter capability
2020-11-06 17:13:56 -08:00
scs.c
scs: switch to vmapped shadow stacks
2020-12-01 10:30:28 +00:00
seccomp.c
A set of updates for entry/exit handling:
2020-12-14 17:13:53 -08:00
signal.c
A set of updates for entry/exit handling:
2020-12-14 17:13:53 -08:00
smp.c
Merge branch 'linus' into sched/core, to resolve semantic conflict
2020-11-27 11:10:50 +01:00
smpboot.c
…
smpboot.h
…
softirq.c
irq: Call tick_irq_enter() inside HARDIRQ_OFFSET
2020-12-02 20:20:05 +01:00
stackleak.c
stackleak: let stack_erasing_sysctl take a kernel pointer buffer
2020-09-19 13:13:39 -07:00
stacktrace.c
stacktrace: Remove reliable argument from arch_stack_walk() callback
2020-09-18 14:24:16 +01:00
static_call.c
static_call: Fix return type of static_call_init
2020-10-02 21:18:25 +02:00
stop_machine.c
Merge branch 'linus' into sched/core, to resolve semantic conflict
2020-11-27 11:10:50 +01:00
sys_ni.c
mm/madvise: introduce process_madvise() syscall: an external memory hinting API
2020-10-18 09:27:10 -07:00
sys.c
kernel: Implement selective syscall userspace redirection
2020-12-02 15:07:56 +01:00
sysctl-test.c
…
sysctl.c
rcu: Panic after fixed number of stalls
2020-11-19 19:37:16 -08:00
task_work.c
Merge branch 'core/urgent' into core/entry
2020-11-04 18:14:52 +01:00
taskstats.c
treewide: rename nla_strlcpy to nla_strscpy.
2020-11-16 08:08:54 -08:00
test_kprobes.c
…
torture.c
rcutorture: Make stutter_wait() caller restore priority
2020-11-06 17:13:54 -08:00
tracepoint.c
tracepoints: Migrate to use SYSCALL_WORK flag
2020-11-16 21:53:15 +01:00
tsacct.c
…
ucount.c
…
uid16.c
…
uid16.h
…
umh.c
usermodehelper: reset umask to default before executing user process
2020-10-06 10:31:52 -07:00
up.c
…
user_namespace.c
fixes-v5.11
2020-12-14 16:40:27 -08:00
user-return-notifier.c
…
user.c
user: Use generic ns_common::count
2020-08-19 14:14:12 +02:00
usermode_driver.c
umd: Stop using split_argv
2020-07-07 11:58:59 -05:00
utsname_sysctl.c
…
utsname.c
uts: Use generic ns_common::count
2020-08-19 14:13:20 +02:00
watch_queue.c
watch_queue: Limit the number of watches a user can hold
2020-08-17 09:39:18 -07:00
watchdog_hld.c
…
watchdog.c
kernel/watchdog: fix watchdog_allowed_mask not used warning
2020-11-14 11:26:03 -08:00
workqueue_internal.h
…
workqueue.c
Merge branch 'akpm' (patches from Andrew)
2020-12-15 12:53:37 -08:00