• Huacai Chen's avatar
    LoongArch: Update cpu_sibling_map when disabling nonboot CPUs · 752cd08d
    Huacai Chen authored
    Update cpu_sibling_map when disabling nonboot CPUs by defining & calling
    clear_cpu_sibling_map(), otherwise we get such errors on SMT systems:
    
    jump label: negative count!
    WARNING: CPU: 6 PID: 45 at kernel/jump_label.c:263 __static_key_slow_dec_cpuslocked+0xec/0x100
    CPU: 6 PID: 45 Comm: cpuhp/6 Not tainted 6.8.0-rc5+ #1340
    pc 90000000004c302c ra 90000000004c302c tp 90000001005bc000 sp 90000001005bfd20
    a0 000000000000001b a1 900000000224c278 a2 90000001005bfb58 a3 900000000224c280
    a4 900000000224c278 a5 90000001005bfb50 a6 0000000000000001 a7 0000000000000001
    t0 ce87a4763eb5234a t1 ce87a4763eb5234a t2 0000000000000000 t3 0000000000000000
    t4 0000000000000006 t5 0000000000000000 t6 0000000000000064 t7 0000000000001964
    t8 000000000009ebf6 u0 9000000001f2a068 s9 0000000000000000 s0 900000000246a2d8
    s1 ffffffffffffffff s2 ffffffffffffffff s3 90000000021518c0 s4 0000000000000040
    s5 9000000002151058 s6 9000000009828e40 s7 00000000000000b4 s8 0000000000000006
       ra: 90000000004c302c __static_key_slow_dec_cpuslocked+0xec/0x100
      ERA: 90000000004c302c __static_key_slow_dec_cpuslocked+0xec/0x100
     CRMD: 000000b0 (PLV0 -IE -DA +PG DACF=CC DACM=CC -WE)
     PRMD: 00000004 (PPLV0 +PIE -PWE)
     EUEN: 00000000 (-FPE -SXE -ASXE -BTE)
     ECFG: 00071c1c (LIE=2-4,10-12 VS=7)
    ESTAT: 000c0000 [BRK] (IS= ECode=12 EsubCode=0)
     PRID: 0014d000 (Loongson-64bit, Loongson-3A6000-HV)
    CPU: 6 PID: 45 Comm: cpuhp/6 Not tainted 6.8.0-rc5+ #1340
    Stack : 0000000000000000 900000000203f258 900000000179afc8 90000001005bc000
            90000001005bf980 0000000000000000 90000001005bf988 9000000001fe0be0
            900000000224c280 900000000224c278 90000001005bf8c0 0000000000000001
            0000000000000001 ce87a4763eb5234a 0000000007f38000 90000001003f8cc0
            0000000000000000 0000000000000006 0000000000000000 4c206e6f73676e6f
            6f4c203a656d616e 000000000009ec99 0000000007f38000 0000000000000000
            900000000214b000 9000000001fe0be0 0000000000000004 0000000000000000
            0000000000000107 0000000000000009 ffffffffffafdabe 00000000000000b4
            0000000000000006 90000000004c302c 9000000000224528 00005555939a0c7c
            00000000000000b0 0000000000000004 0000000000000000 0000000000071c1c
            ...
    Call Trace:
    [<9000000000224528>] show_stack+0x48/0x1a0
    [<900000000179afc8>] dump_stack_lvl+0x78/0xa0
    [<9000000000263ed0>] __warn+0x90/0x1a0
    [<90000000017419b8>] report_bug+0x1b8/0x280
    [<900000000179c564>] do_bp+0x264/0x420
    [<90000000004c302c>] __static_key_slow_dec_cpuslocked+0xec/0x100
    [<90000000002b4d7c>] sched_cpu_deactivate+0x2fc/0x300
    [<9000000000266498>] cpuhp_invoke_callback+0x178/0x8a0
    [<9000000000267f70>] cpuhp_thread_fun+0xf0/0x240
    [<90000000002a117c>] smpboot_thread_fn+0x1dc/0x2e0
    [<900000000029a720>] kthread+0x140/0x160
    [<9000000000222288>] ret_from_kernel_thread+0xc/0xa4
    
    Cc: stable@vger.kernel.org
    Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
    752cd08d
smp.c 16.1 KB