• Peter Zijlstra's avatar
    lockdep: annotate kprobes irq fiddling · 58dfe883
    Peter Zijlstra authored
    kprobes disables irqs for jprobes, but does not tell lockdep about it.
    
    This resolves this warning during an allyesconfig bzImage bootup test:
    
     [  423.670337] WARNING: at kernel/lockdep.c:2658 check_flags()
     [  423.670341]  [<c0107f01>] show_trace_log_lvl+0x19/0x2e
     [  423.670348]  [<c0107ffa>] show_trace+0x12/0x14
     [  423.670350]  [<c0108010>] dump_stack+0x14/0x16
     [  423.670353]  [<c015249d>] check_flags+0x95/0x142
     [  423.670357]  [<c0155576>] lock_acquire+0x52/0xb8
     [  423.670360]  [<c1313c90>] _spin_lock+0x2e/0x58
     [  423.670365]  [<c11b72f9>] jtcp_rcv_established+0x6e/0x189
     [  423.670369]  [<c11810da>] tcp_v4_do_rcv+0x30b/0x620
     [  423.670373]  [<c1181c8c>] tcp_v4_rcv+0x89d/0x8fa
     [  423.670376]  [<c1167dba>] ip_local_deliver+0x17d/0x225
     [  423.670380]  [<c11682f5>] ip_rcv+0x493/0x4ce
     [  423.670383]  [<c11177ef>] netif_receive_skb+0x347/0x365
     [  423.670388]  [<c07b6e7b>] nv_napi_poll+0x501/0x6c3
     [  423.670393]  [<c1115b1a>] net_rx_action+0xa3/0x1b6
     [  423.670396]  [<c013bdee>] __do_softirq+0x76/0xfb
     [  423.670400]  [<c0109189>] do_softirq+0x75/0xf3
    
    [ akpm: checkpatch.pl cleanups ]
    
    Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com>
    Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
    Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
    Cc: David S. Miller <davem@davemloft.net>
    Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
    Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    58dfe883
kprobes_64.c 22 KB