请教：warn_slowpath_fmt,warn_slowpath_common,unwind_backtrace

Question

WARNING: at drivers/gpio/gpiolib.c:103 gpio_ensure_requested+0x58/0xd8()
autorequest GPIO-83
Modules linked in:
[<c031a820>] (unwind_backtrace+0x0/0xf4) from [<c032ee10>] (warn_slowpath_common+0x4c/0x64)
[<c032ee10>] (warn_slowpath_common+0x4c/0x64) from [<c032eebc>] (warn_slowpath_fmt+0x30/0x40)
[<c032eebc>] (warn_slowpath_fmt+0x30/0x40) from [<c0475ccc>] (gpio_ensure_requested+0x58/0xd
[<c0475ccc>] (gpio_ensure_requested+0x58/0xd from [<c0475ec4>] (gpio_direction_input+0x80/0xe
[<c0475ec4>] (gpio_direction_input+0x80/0xe from [<c0320684>] (micco_init_irq+0x10/0x1c)
[<c0320684>] (micco_init_irq+0x10/0x1c) from [<c0617a64>] (micco_probe+0x128/0x2b0)      
[<c0617a64>] (micco_probe+0x128/0x2b0) from [<c0519574>] (i2c_device_probe+0xbc/0xdc)   
[<c0519574>] (i2c_device_probe+0xbc/0xdc) from [<c04a5578>] (driver_probe_device+0x110/0x190)

在移植驱动过程中遇到的问题，但是在内核源码中warn_slowpath_fmt,warn_slowpath_common,unwind_backtrace找不到这三个符号，这是为什么呢

Answer 1

同问，我这也出现了这个问题

Jan 10 17:37:43 (none) user.warn kernel: ------------[ cut here ]------------
Jan 10 17:37:43 (none) user.warn kernel: WARNING: at kernel/softirq.c:143 local_bh_enable+0x3c/0x86()
Jan 10 17:37:43 (none) user.warn kernel: Hardware name: To Be Filled By O.E.M.
Jan 10 17:37:43 (none) user.warn kernel: Modules linked in: nfe_l7_filter ace_kernel
Jan 10 17:37:43 (none) user.warn kernel: Pid: 0, comm: kworker/0:0 Not tainted 2.6.36.1+ #10
Jan 10 17:37:43 (none) user.warn kernel: Call Trace:
Jan 10 17:37:43 (none) user.warn kernel:  <IRQ>  [<ffffffff81038f18>] ? local_bh_enable+0x3c/0x86
Jan 10 17:37:43 (none) user.warn kernel:  [<ffffffff81033ad0>] ? warn_slowpath_common+0x78/0x8d
Jan 10 17:37:43 (none) user.warn kernel:  [<ffffffff81038f18>] ? local_bh_enable+0x3c/0x86
Jan 10 17:37:43 (none) user.warn kernel:  [<ffffffff813eb5c3>] ? __nf_conntrack_find+0xfb/0x126
Jan 10 17:37:43 (none) user.warn kernel:  [<ffffffff813eb608>] ? nf_conntrack_find_get+0x1a/0x111
Jan 10 17:37:43 (none) user.warn kernel:  [<ffffffffa005412b>] ? fe_get_policy_id_from_session_id+0x11c/0x34e [ace_kernel]
Jan 10 17:37:43 (none) user.warn kernel:  [<ffffffffa0064644>] ? fe_pre_process_func+0x1723/0x1c64 [ace_kernel]
Jan 10 17:37:43 (none) user.warn kernel:  [<ffffffffa00b81c0>] ? sg_get_l2_ispid_by_smac+0x20/0x37 [ace_kernel]
Jan 10 17:37:43 (none) user.warn kernel:  [<ffffffffa00b7fc7>] ? l2_query_by_mac+0xa2/0x23f [ace_kernel]
Jan 10 17:37:43 (none) user.warn kernel:  [<ffffffffa00c827a>] ? SgTlFindByPort+0x5b/0xa4 [ace_kernel]
Jan 10 17:37:43 (none) user.warn kernel:  [<ffffffffa00e7b57>] ? l2_handle_frame+0x60b/0x7bc [ace_kernel]
Jan 10 17:37:43 (none) user.warn kernel:  [<ffffffff813b1807>] ? __netif_receive_skb+0x32a/0x42b
Jan 10 17:37:43 (none) user.warn kernel:  [<ffffffff810079e3>] ? nommu_map_page+0x0/0x6f
Jan 10 17:37:43 (none) user.warn kernel:  [<ffffffff813b2286>] ? netif_receive_skb+0x6f/0x75
Jan 10 17:37:43 (none) user.warn kernel:  [<ffffffffa013137b>] ? anc_pcie_napi_poll+0x2a0/0x3a2 [ace_kernel]
Jan 10 17:37:43 (none) user.warn kernel:  [<ffffffff810079e3>] ? nommu_map_page+0x0/0x6f
Jan 10 17:37:43 (none) user.warn kernel:  [<ffffffff813b4a9c>] ? net_rx_action+0x76/0x13f
Jan 10 17:37:43 (none) user.warn kernel:  [<ffffffff810387ba>] ? __do_softirq+0xc9/0x181
Jan 10 17:37:43 (none) user.warn kernel:  [<ffffffff8100370c>] ? call_softirq+0x1c/0x28
Jan 10 17:37:43 (none) user.warn kernel:  [<ffffffff81004af1>] ? do_softirq+0x31/0x64
Jan 10 17:37:43 (none) user.warn kernel:  [<ffffffff810041f3>] ? do_IRQ+0xa7/0xbd
Jan 10 17:37:43 (none) user.warn kernel:  [<ffffffff814edf93>] ? ret_from_intr+0x0/0xa
Jan 10 17:37:43 (none) user.warn kernel:  <EOI>  [<ffffffff810091d8>] ? mwait_idle+0xba/0xc1
Jan 10 17:37:43 (none) user.warn kernel:  [<ffffffff810019e0>] ? cpu_idle+0x45/0x94
Jan 10 17:37:43 (none) user.warn kernel: ---[ end trace 2197bfeaebdbf138 ]---