• Peter Zijlstra's avatar
    module, jump_label: Fix module locking · bed831f9
    Peter Zijlstra authored
    As per the module core lockdep annotations in the coming patch:
    
    [   18.034047] ---[ end trace 9294429076a9c673 ]---
    [   18.047760] Hardware name: Intel Corporation S2600GZ/S2600GZ, BIOS SE5C600.86B.02.02.0002.122320131210 12/23/2013
    [   18.059228]  ffffffff817d8676 ffff880036683c38 ffffffff8157e98b 0000000000000001
    [   18.067541]  0000000000000000 ffff880036683c78 ffffffff8105fbc7 ffff880036683c68
    [   18.075851]  ffffffffa0046b08 0000000000000000 ffffffffa0046d00 ffffffffa0046cc8
    [   18.084173] Call Trace:
    [   18.086906]  [<ffffffff8157e98b>] dump_stack+0x4f/0x7b
    [   18.092649]  [<ffffffff8105fbc7>] warn_slowpath_common+0x97/0xe0
    [   18.099361]  [<ffffffff8105fc2a>] warn_slowpath_null+0x1a/0x20
    [   18.105880]  [<ffffffff810ee502>] __module_address+0x1d2/0x1e0
    [   18.112400]  [<ffffffff81161153>] jump_label_module_notify+0x143/0x1e0
    [   18.119710]  [<ffffffff810814bf>] notifier_call_chain+0x4f/0x70
    [   18.126326]  [<ffffffff8108160e>] __blocking_notifier_call_chain+0x5e/0x90
    [   18.134009]  [<ffffffff81081656>] blocking_notifier_call_chain+0x16/0x20
    [   18.141490]  [<ffffffff810f0f00>] load_module+0x1b50/0x2660
    [   18.147720]  [<ffffffff810f1ade>] SyS_init_module+0xce/0x100
    [   18.154045]  [<ffffffff81587429>] system_call_fastpath+0x12/0x17
    [   18.160748] ---[ end trace 9294429076a9c674 ]---
    
    Jump labels is not doing it right; fix this.
    
    Cc: Rusty Russell <rusty@rustcorp.com.au>
    Cc: Jason Baron <jbaron@akamai.com>
    Acked-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
    Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
    Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
    bed831f9
jump_label.c 11 KB