acrn-kernel/kernel
John Stultz 1b9c92432f locking/rwsem: Add __always_inline annotation to __down_read_common() and inlined callers
commit 92cc5d00a4 upstream.

Apparently despite it being marked inline, the compiler
may not inline __down_read_common() which makes it difficult
to identify the cause of lock contention, as the blocked
function in traceevents will always be listed as
__down_read_common().

So this patch adds __always_inline annotation to the common
function (as well as the inlined helper callers) to force it to
be inlined so the blocking function will be listed (via Wchan)
in traceevents.

Fixes: c995e638cc ("locking/rwsem: Fold __down_{read,write}*()")
Reported-by: Tim Murray <timmurray@google.com>
Signed-off-by: John Stultz <jstultz@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Waiman Long <longman@redhat.com>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20230503023351.2832796-1-jstultz@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-05-17 11:53:57 +02:00
..
bpf bpf: Don't EFAULT for getsockopt with optval=NULL 2023-05-11 23:03:26 +09:00
cgroup cgroup/cpuset: Add cpuset_can_fork() and cpuset_cancel_fork() methods 2023-04-20 12:35:14 +02:00
configs Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
debug
dma swiotlb: fix debugfs reporting of reserved memory pools 2023-05-11 23:03:35 +09:00
entry entry/rcu: Check TIF_RESCHED _after_ delayed RCU wake-up 2023-03-30 12:49:13 +02:00
events perf/core: Fix hardlockup failure caused by perf throttle 2023-05-11 23:03:31 +09:00
futex futex: Fix futex_waitv() hrtimer debug object leak on kcalloc error 2023-01-04 11:28:58 +01:00
gcov gcov: add support for checksum field 2022-12-31 13:33:11 +01:00
irq genirq/ipi: Fix NULL pointer deref in irq_data_get_affinity_mask() 2023-03-11 13:55:29 +01:00
kcsan kcsan: Avoid READ_ONCE() in read_instrumented_memory() 2023-05-11 23:03:40 +09:00
livepatch Livepatching changes for 6.1 2022-10-10 11:36:19 -07:00
locking locking/rwsem: Add __always_inline annotation to __down_read_common() and inlined callers 2023-05-17 11:53:57 +02:00
module module: Don't wait for GOING modules 2023-02-01 08:34:37 +01:00
power PM: hibernate: Do not get block device exclusively in test_resume mode 2023-05-11 23:03:38 +09:00
printk kernel/printk/index.c: fix memory leak with using debugfs_lookup() 2023-03-11 13:55:32 +01:00
rcu rcu: Avoid stack overflow due to __rcu_irq_enter_check_tick() being kprobe-ed 2023-05-11 23:03:02 +09:00
sched sched/rt: Fix bad task migration for rt tasks 2023-05-11 23:03:32 +09:00
time timekeeping: Fix references to nonexistent ktime_get_fast_ns() 2023-05-11 23:03:35 +09:00
trace tracing/user_events: Ensure write index cannot be negative 2023-05-11 23:03:32 +09:00
.gitignore
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
Makefile cfi: Fix CFI failure with KASAN 2022-12-31 13:33:08 +01:00
acct.c acct: fix potential integer overflow in encode_comp_t() 2022-12-31 13:32:58 +01:00
async.c
audit.c
audit.h
audit_fsnotify.c
audit_tree.c
audit_watch.c
auditfilter.c
auditsc.c audit/stable-6.1 PR 20221003 2022-10-04 11:05:43 -07:00
backtracetest.c
bounds.c
capability.c
cfi.c
compat.c sched_getaffinity: don't assume 'cpumask_size()' is fully initialized 2023-04-06 12:10:40 +02:00
configs.c
context_tracking.c context_tracking: Fix noinstr vs KASAN 2023-03-10 09:33:45 +01:00
cpu.c cpu/hotplug: Do not bail-out in DYING/STARTING sections 2022-12-31 13:31:59 +01:00
cpu_pm.c
crash_core.c
crash_dump.c
cred.c
delayacct.c
dma.c
exec_domain.c
exit.c exit: Detect and fix irq disabled state in oops 2023-03-10 09:33:45 +01:00
extable.c
fail_function.c kernel/fail_function: fix memory leak with using debugfs_lookup() 2023-03-11 13:55:39 +01:00
fork.c mm: enable maple tree RCU mode by default. 2023-04-13 16:55:40 +02:00
freezer.c
gen_kheaders.sh kbuild: build init/built-in.a just once 2022-09-29 04:40:15 +09:00
groups.c
hung_task.c sched: Fix more TASK_state comparisons 2022-09-30 16:50:39 +02:00
iomem.c
irq_work.c
jump_label.c
kallsyms.c kcfi updates for v6.1-rc1 2022-10-03 17:11:07 -07:00
kallsyms_internal.h
kcmp.c
kcov.c kcov: kmsan: unpoison area->list in kcov_remote_area_put() 2022-10-03 14:03:23 -07:00
kexec.c
kexec_core.c
kexec_elf.c
kexec_file.c
kexec_internal.h
kheaders.c kheaders: Use array declaration instead of char 2023-05-11 23:03:02 +09:00
kmod.c
kprobes.c kprobes: Fix to handle forcibly unoptimized kprobes on freeing_list 2023-03-10 09:34:27 +01:00
ksysfs.c
kthread.c signal: break out of wait loops on kthread_stop() 2022-10-09 16:01:59 -07:00
latencytop.c
module_signature.c
notifier.c
nsproxy.c
padata.c padata: Fix list iterator in padata_do_serial() 2022-12-31 13:32:34 +01:00
panic.c panic: fix the panic_print NMI backtrace setting 2023-03-10 09:34:25 +01:00
params.c
pid.c
pid_namespace.c rcu-tasks: Fix synchronize_rcu_tasks() VS zap_pid_ns_processes() 2023-03-10 09:32:52 +01:00
profile.c
ptrace.c
range.c
reboot.c kernel/reboot: Add SYS_OFF_MODE_RESTART_PREPARE mode 2022-10-04 15:59:36 +02:00
regset.c
relay.c relayfs: fix out-of-bounds access in relay_file_read 2023-05-11 23:03:03 +09:00
resource.c dax/kmem: Fix leak of memory-hotplug resources 2023-03-10 09:34:25 +01:00
resource_kunit.c
rseq.c rseq: Use pr_warn_once() when deprecated/unknown ABI flags are encountered 2022-11-14 09:58:32 +01:00
scftorture.c
scs.c
seccomp.c
signal.c Scheduler changes for v6.1: 2022-10-10 09:10:28 -07:00
smp.c bitmap patches for v6.1-rc1 2022-10-10 12:49:34 -07:00
smpboot.c
smpboot.h
softirq.c
stackleak.c
stacktrace.c
static_call.c
static_call_inline.c
stop_machine.c
sys.c kernel/sys.c: fix and improve control flow in __sys_setres[ug]id() 2023-04-26 14:28:39 +02:00
sys_ni.c
sysctl-test.c
sysctl.c proc: proc_skip_spaces() shouldn't think it is working on C strings 2022-12-05 12:09:06 -08:00
task_work.c
taskstats.c
torture.c torture: Fix hang during kthread shutdown phase 2023-03-10 09:34:07 +01:00
tracepoint.c
tsacct.c
ucount.c
uid16.c
uid16.h
umh.c freezer,umh: Fix call_usermode_helper_exec() vs SIGKILL 2023-02-22 12:59:50 +01:00
up.c
user-return-notifier.c
user.c
user_namespace.c ucounts: Split rlimit and ucount values and max values 2022-10-09 16:24:05 -07:00
usermode_driver.c
utsname.c
utsname_sysctl.c kernel/utsname_sysctl.c: Fix hostname polling 2022-10-23 12:01:01 -07:00
watch_queue.c watch_queue: fix IOC_WATCH_QUEUE_SET_SIZE alloc error paths 2023-03-17 08:50:30 +01:00
watchdog.c
watchdog_hld.c
workqueue.c workqueue: Fix hung time report of worker pools 2023-05-11 23:03:32 +09:00
workqueue_internal.h