timer misc

timer timeout callback callstack

[   99.021468] CPU: 2 PID: 0 Comm: swapper/2 Tainted: P           O      4.19.116+ #53
[   99.029138] Hardware name: xxx(DT)
[   99.032802] Call trace:
[   99.035261]  dump_backtrace+0x0/0x4
[   99.038759]  dump_stack+0xf4/0x134
[   99.042169]  override_mem_timer_fn+0x18/0x44
[   99.046445]  call_timer_fn+0x134/0x29c
[   99.050197]  run_timer_softirq+0x4b4/0xb2c
[   99.054299]  __do_softirq+0x1f8/0x490
[   99.057967]  irq_exit+0x1d4/0x244
[   99.061290]  __handle_domain_irq+0x140/0x1e0
[   99.065565]  gic_handle_irq+0x50/0xbc
[   99.069231]  el1_irq+0xe8/0x190
[   99.072377]  arch_cpu_idle+0x208/0x470
[   99.076132]  do_idle+0x208/0x340
[   99.079366]  cpu_startup_entry+0x94/0x98
[   99.083296]  __cpu_disable+0x0/0xe8