[ 316.174000] BUG: scheduling while atomic: swapper/0/0/0x00010002
[ 316.174000] Modules linked in: btn_drv(O)
[ 316.174000] [<c0014e80>] (unwind_backtrace+0x0/0x138) from [<c06f0bf0>] (__schedule+0x748/0x7d4)
[ 316.174000] [<c06f0bf0>] (__schedule+0x748/0x7d4) from [<c06eee38>] (schedule_timeout+0x174/0x2f8)
[ 316.174000] [<c06eee38>] (schedule_timeout+0x174/0x2f8) from [<c00509d8>] (msleep+0x14/0x20)
[ 316.174000] [<c00509d8>] (msleep+0x14/0x20) from [<bf000050>] (btn_isr+0x10/0x78 [btn_drv])
[ 316.174000] [<bf000050>] (btn_isr+0x10/0x78 [btn_drv]) from [<c00b27f4>] (handle_irq_event_percpu+0x58/0x2a8)
[ 316.174000] [<c00b27f4>] (handle_irq_event_percpu+0x58/0x2a8) from [<c00b2a80>] (handle_irq_event+0x3c/0x5c)
[ 316.174000] [<c00b2a80>] (handle_irq_event+0x3c/0x5c) from [<c00b51a8>] (handle_level_irq+0xac/0xfc)
[ 316.174000] [<c00b51a8>] (handle_level_irq+0xac/0xfc) from [<c001e988>] (gpio_handler+0x90/0x174)
[ 316.174000] [<c001e988>] (gpio_handler+0x90/0x174) from [<c00b207c>] (generic_handle_irq+0x24/0x38)
[ 316.174000] [<c00b207c>] (generic_handle_irq+0x24/0x38) from [<c000f518>] (handle_IRQ+0x4c/0xb0)
[ 316.174000] [<c000f518>] (handle_IRQ+0x4c/0xb0) from [<c0008528>] (gic_handle_irq+0x24/0x58)
[ 316.174000] [<c0008528>] (gic_handle_irq+0x24/0x58) from [<c000e880>] (__irq_svc+0x40/0x70)
[ 316.174000] Exception stack(0xc0a4ff60 to 0xc0a4ffa8)
[ 316.174000] ff60: ffffffed 00000000 00a90000 00000000 c0a4e000 c0a4e000 c0ae7288 c06f62f4
[ 316.174000] ff80: c0a4e000 410fd033 c0a6c158 00000000 00000019 c0a4ffa8 c000f808 c000f80c
[ 316.174000] ffa0: 60000013 ffffffff
[ 316.174000] [<c000e880>] (__irq_svc+0x40/0x70) from [<c000f80c>] (default_idle+0x28/0x30)
[ 316.174000] [<c000f80c>] (default_idle+0x28/0x30) from [<c000fba8>] (cpu_idle+0xc8/0x104)
[ 316.174000] [<c000fba8>] (cpu_idle+0xc8/0x104) from [<c0a107e0>] (start_kernel+0x2d4/0x330)
[ 316.174000] bad: scheduling from the idle thread!
[ 316.174000] [<c0014e80>] (unwind_backtrace+0x0/0x138) from [<c0073390>] (dequeue_task_idle+0x1c/0x28)
[ 316.174000] [<c0073390>] (dequeue_task_idle+0x1c/0x28) from [<c006d8e0>] (dequeue_task+0xb4/0xc0)
[ 316.174000] [<c006d8e0>] (dequeue_task+0xb4/0xc0) from [<c06f08fc>] (__schedule+0x454/0x7d4)
[ 316.174000] [<c06f08fc>] (__schedule+0x454/0x7d4) from [<c06eee38>] (schedule_timeout+0x174/0x2f8)
[ 316.174000] [<c06eee38>] (schedule_timeout+0x174/0x2f8) from [<c00509d8>] (msleep+0x14/0x20)
[ 316.174000] [<c00509d8>] (msleep+0x14/0x20) from [<bf000050>] (btn_isr+0x10/0x78 [btn_drv])
[ 316.174000] [<bf000050>] (btn_isr+0x10/0x78 [btn_drv]) from [<c00b27f4>] (handle_irq_event_percpu+0x58/0x2a8)
[ 316.174000] [<c00b27f4>] (handle_irq_event_percpu+0x58/0x2a8) from [<c00b2a80>] (handle_irq_event+0x3c/0x5c)
[ 316.174000] [<c00b2a80>] (handle_irq_event+0x3c/0x5c) from [<c00b51a8>] (handle_level_irq+0xac/0xfc)
[ 316.174000] [<c00b51a8>] (handle_level_irq+0xac/0xfc) from [<c001e988>] (gpio_handler+0x90/0x174)
[ 316.174000] [<c001e988>] (gpio_handler+0x90/0x174) from [<c00b207c>] (generic_handle_irq+0x24/0x38)
[ 316.174000] [<c00b207c>] (generic_handle_irq+0x24/0x38) from [<c000f518>] (handle_IRQ+0x4c/0xb0)
[ 316.174000] [<c000f518>] (handle_IRQ+0x4c/0xb0) from [<c0008528>] (gic_handle_irq+0x24/0x58)
[ 316.174000] [<c0008528>] (gic_handle_irq+0x24/0x58) from [<c000e880>] (__irq_svc+0x40/0x70)
[ 316.174000] Exception stack(0xc0a4ff60 to 0xc0a4ffa8)
[ 316.174000] ff60: ffffffed 00000000 00a90000 00000000 c0a4e000 c0a4e000 c0ae7288 c06f62f4
[ 316.174000] ff80: c0a4e000 410fd033 c0a6c158 00000000 00000019 c0a4ffa8 c000f808 c000f80c
[ 316.174000] ffa0: 60000013 ffffffff
[ 316.174000] [<c000e880>] (__irq_svc+0x40/0x70) from [<c000f80c>] (default_idle+0x28/0x30)
[ 316.174000] [<c000f80c>] (default_idle+0x28/0x30) from [<c000fba8>] (cpu_idle+0xc8/0x104)
[ 316.174000] [<c000fba8>] (cpu_idle+0xc8/0x104) from [<c0a107e0>] (start_kernel+0x2d4/0x330)
[ 316.174000] ------------[ cut here ]------------
[ 316.174000] WARNING: at kernel/timer.c:1063 del_timer_sync+0x4c/0x54()
[ 316.174000] Modules linked in: btn_drv(O)
[ 316.174000] [<c0014e80>] (unwind_backtrace+0x0/0x138) from [<c0042814>] (warn_slowpath_common+0x4c/0x64)
[ 316.174000] [<c0042814>] (warn_slowpath_common+0x4c/0x64) from [<c0042848>] (warn_slowpath_null+0x1c/0x24)
[ 316.174000] [<c0042848>] (warn_slowpath_null+0x1c/0x24) from [<c004f584>] (del_timer_sync+0x4c/0x54)
[ 316.174000] [<c004f584>] (del_timer_sync+0x4c/0x54) from [<c06eee40>] (schedule_timeout+0x17c/0x2f8)
[ 316.174000] [<c06eee40>] (schedule_timeout+0x17c/0x2f8) from [<c00509d8>] (msleep+0x14/0x20)
[ 316.174000] [<c00509d8>] (msleep+0x14/0x20) from [<bf000050>] (btn_isr+0x10/0x78 [btn_drv])
[ 316.174000] [<bf000050>] (btn_isr+0x10/0x78 [btn_drv]) from [<c00b27f4>] (handle_irq_event_percpu+0x58/0x2a8)
[ 316.174000] [<c00b27f4>] (handle_irq_event_percpu+0x58/0x2a8) from [<c00b2a80>] (handle_irq_event+0x3c/0x5c)
[ 316.174000] [<c00b2a80>] (handle_irq_event+0x3c/0x5c) from [<c00b51a8>] (handle_level_irq+0xac/0xfc)
[ 316.174000] [<c00b51a8>] (handle_level_irq+0xac/0xfc) from [<c001e988>] (gpio_handler+0x90/0x174)
[ 316.174000] [<c001e988>] (gpio_handler+0x90/0x174) from [<c00b207c>] (generic_handle_irq+0x24/0x38)
[ 316.174000] [<c00b207c>] (generic_handle_irq+0x24/0x38) from [<c000f518>] (handle_IRQ+0x4c/0xb0)
[ 316.174000] [<c000f518>] (handle_IRQ+0x4c/0xb0) from [<c0008528>] (gic_handle_irq+0x24/0x58)
[ 316.174000] [<c0008528>] (gic_handle_irq+0x24/0x58) from [<c000e880>] (__irq_svc+0x40/0x70)
[ 316.174000] Exception stack(0xc0a4ff60 to 0xc0a4ffa8)
[ 316.174000] ff60: ffffffed 00000000 00a90000 00000000 c0a4e000 c0a4e000 c0ae7288 c06f62f4
[ 316.174000] ff80: c0a4e000 410fd033 c0a6c158 00000000 00000019 c0a4ffa8 c000f808 c000f80c
[316.174000] FFA0: 60,000,013 FFFFFFFF
[316.174000] [<c000e880>] (__irq_svc + 0x40 / 0x70) from [<c000f80c>] (default_idle + 0x28 / 0x30)
[316.174000] [<c000f80c>] (default_idle + 0x28 / 0x30) from [<c000fba8>] (+ 0xC8 cpu_idle / 0x104)
[316.174000] [<c000fba8>] (+ 0xC8 cpu_idle / 0x104) from [<c0a107e0>] (+ 0x2d4 the start_kernel / 0x330)
[316.174000] --- [End the trace 34a513405ae794cb] ---
when you call sleep in the interrupt handler or may cause obstruction or sleep function is to print the information given after a kernel crash. In essence, it is released in the interrupt cpu resources.