__cpu_online_mask的设置

test_and_set_bit (addr=, nr=) at /home/chenlinfei/workspace/linux/arch/riscv/include/asm/bitops.h:73
73              return __test_and_op_bit(or, __NOP, nr, addr);
(gdb) bt
#0  test_and_set_bit (addr=, nr=) at /home/chenlinfei/workspace/linux/arch/riscv/include/asm/bitops.h:73
#1  cpumask_test_and_set_cpu (cpumask=, cpu=) at /home/chenlinfei/workspace/linux/include/linux/cpumask.h:458
#2  set_cpu_online (cpu=0, online=true) at /home/chenlinfei/workspace/linux/kernel/cpu.c:2682
#3  0xffffffff80206062 in boot_cpu_init () at /home/chenlinfei/workspace/linux/kernel/cpu.c:2698
#4  0xffffffff80200610 in start_kernel () at /home/chenlinfei/workspace/linux/init/main.c:955
#5  0xffffffff80001172 in _start_kernel () at /home/chenlinfei/workspace/linux/arch/riscv/kernel/head.S:328