* drivers/perf: riscv: BUG: using smp_processor_id() in preemptible
@ 2024-08-20 7:49 Nam Cao
0 siblings, 0 replies; only message in thread
From: Nam Cao @ 2024-08-20 7:49 UTC (permalink / raw)
To: Atish Patra, Palmer Dabbelt, Anup Patel, Conor Dooley,
Andrew Jones, Samuel Holland
Cc: linux-riscv, linux-kernel
Hi,
I noticed the following issue on 6.11.0-rc4 with CONFIG_DEBUG_PREEMPT=y.
BUG: using smp_processor_id() in preemptible [00000000] code: swapper/0/1
caller is debug_smp_processor_id+0x1c/0x26
CPU: 2 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.11.0-rc4 #2
Hardware name: StarFive VisionFive 2 v1.3B (DT)
Call Trace:
dump_backtrace+0x1c/0x24
show_stack+0x2c/0x38
dump_stack_lvl+0x5a/0x72
dump_stack+0x14/0x1c
check_preemption_disabled+0xb6/0xb8
debug_smp_processor_id+0x1c/0x26
pmu_sbi_device_probe+0x474/0x570
platform_probe+0x52/0x96
really_probe+0x82/0x202
__driver_probe_device+0x5c/0xd0
driver_probe_device+0x2c/0xb0
__device_attach_driver+0x6e/0x8e
bus_for_each_drv+0x64/0xb8
__device_attach+0x82/0x144
device_initial_probe+0xe/0x16
bus_probe_device+0x86/0x88
device_add+0x508/0x6ac
platform_device_add+0xcc/0x1c8
platform_device_register_full+0xee/0x142
pmu_sbi_devinit+0xd4/0x11c
do_one_initcall+0x58/0x19c
kernel_init_freeable+0x210/0x27a
kernel_init+0x1e/0x112
ret_from_fork+0xe/0x1c
If you fix the issue, please add:
Reported-by: Nam Cao <namcao@linutronix.de>
Best regards,
Nam
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