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    ARM: 5868/1: ARM: fix "BUG: using smp_processor_id() in preemptible code" · 22325525
    Rabin Vincent 提交于
    Fix the following warning, which appears when the register dump for a
    faulting process is printed in a kernel with SMP, DEBUG_PREEMPT, and
    DEBUG_USER (with user_debug=31) enabled:
    
    BUG: using smp_processor_id() in preemptible [00000000] code: init/1
    caller is __show_regs+0x18/0x234
    Backtrace:
    [<c0159e5c>] (dump_backtrace+0x0/0x114) from [<c01faf30>] (dump_stack+0x18/0x1c)
     r6:c781a000 r5:c0157544 r4:00000001 r3:00000000
    [<c01faf18>] (dump_stack+0x0/0x1c) from [<c01e5230>] (debug_smp_processor_id+0xc4/0xf8)
    [<c01e516c>] (debug_smp_processor_id+0x0/0xf8) from [<c0157544>] (__show_regs+0x18/0x234)
     r6:c781bfb0 r5:00000000 r4:c781bfb0 r3:00000000
    [<c015752c>] (__show_regs+0x0/0x234) from [<c01577a0>] (show_regs+0x40/0x50)
    [<c0157760>] (show_regs+0x0/0x50) from [<c015c968>] (__do_user_fault+0x5c/0xa4)
     r4:c781c000 r3:00000000
    [<c015c90c>] (__do_user_fault+0x0/0xa4) from [<c015cbe0>] (do_page_fault+0x1b4/0x1e4)
     r7:00000000 r6:00010000 r5:c781bfb0 r4:c781c000
    [<c015ca2c>] (do_page_fault+0x0/0x1e4) from [<c01554c8>] (do_DataAbort+0x3c/0xa0)
    [<c015548c>] (do_DataAbort+0x0/0xa0) from [<c01560c4>] (ret_from_exception+0x0/0x10)
    Signed-off-by: NRabin Vincent <rabin@rab.in>
    Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
    22325525
process.c 9.7 KB