Trace32 has ability to show inline call in callstack

[zhaoqianli0202]

Hi
I found Trace32 can show inline calling,but crash-utility couldn't do it,i use same ramdump and O2 optimization do the test,it's very useful feature,but i don't understand why trace32 can parse inline call,does any expert understand this technology or method?

kconfig:
CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE=y

Trace32 stackframe:
1 -000|queued_write_lock_slowpath(?)
2 -001|queued_write_lock(inline)
3 -001|__raw_write_lock_irq(inline)
4 -001|raw_write_lock_irq(?)
5 -002|mhi_pm_m0_transition(mhi_cntrl = 0xFFFFFFF9AFA86C00)
6 -003|mhi_pm_fast_resume(mhi_cntrl = 0xFFFFFFF9AFA86C00, ?)
7 -004|mhi_runtime_resume(?)
8 -005|pci_pm_runtime_resume(dev = 0xFFFFFFF9903C6098)
9 -006|__rpm_callback(cb = 0xFFFFFF99C4390608, dev = 0xFFFFFFF9903C6098)
10 -007|memalloc_noio_restore(inline)
11 -007|rpm_callback(inline)
12 -007|rpm_resume(dev = 0xFFFFFFF9903C6098, ?)
13 -008|pm_runtime_work(work = 0xFFFFFFF9903C61E0)
14 -009|__read_once_size(inline)
15 -009|static_key_count(inline)
16 -009|static_key_false(inline)
17 -009|trace_workqueue_execute_end(inline)
18 -009|process_one_work(worker = 0xFFFFFFF9027FD700, work = 0xFFFFFFF9903C61E0)
19 -010|__read_once_size(inline)
20 -010|list_empty(inline)
21 -010|worker_thread(__worker = 0xFFFFFFF9027FD700)
22 -011|kthread(_create = 0xFFFFFFF84719A780)
23 -012|ret_from_fork(asm)
24 ---|end of frame

crash> bt fffffff9025c0000
PID: 14537 TASK: fffffff9025c0000 CPU: 2 COMMAND: "kworker/2:3"
#0 [ffffff8025983b90] queued_write_lock_slowpath at ffffff99c3f400e8
#1 [ffffff8025983ba0] _raw_write_lock_irq at ffffff99c524b9f8
#2 [ffffff8025983be0] mhi_pm_m0_transition at ffffff99c4337c84
#3 [ffffff8025983c10] mhi_pm_fast_resume at ffffff99c433b2bc
#4 [ffffff8025983c40] mhi_runtime_resume at ffffff99c433fe80
#5 [ffffff8025983c70] pci_pm_runtime_resume at ffffff99c43906a8
#6 [ffffff8025983cd0] __rpm_callback at ffffff99c45aaeac
#7 [ffffff8025983d70] rpm_resume at ffffff99c45a98f0
#8 [ffffff8025983d90] pm_runtime_work at ffffff99c45aa638
#9 [ffffff8025983de0] process_one_work at ffffff99c3ed8f08
#10 [ffffff8025983e50] worker_thread at ffffff99c3ed9460
#11 [ffffff8025983eb0] kthread at ffffff99c3edf204