Hello,
It seems that because ipcomp_alloc_tfms() calls smp_processor_id(),
but a comment says not need locking. Is this right?
----
BUG: using smp_processor_id() in preemptible [00000001] code: ipcomp/2801
caller is ipcomp_init_state+0x170/0x490
Call Trace:<ffffffff802286c6>{debug_smp_processor_id+182}
<ffffffff80342e70>{ipcomp_init_state+368}
<ffffffff80354ebc>{xfrm_init_state+124}
<ffffffff80393c0d>{pfkey_add+1437}
<ffffffff803955ec>{pfkey_sendmsg+572}
<ffffffff8015a190>{file_read_actor+0}
<ffffffff802ee500>{sock_sendmsg+224}
<ffffffff8015fa27>{buffered_rmqueue+695}
<ffffffff8014ced0>{autoremove_wake_function+0}
<ffffffff803af411>{_spin_unlock+17}
<ffffffff8016c2eb>{do_no_page+987} <ffffffff803af411>{_spin_unlock+17}
<ffffffff8017ffeb>{fget+91} <ffffffff802eeb8a>{sockfd_lookup+26}
<ffffffff802ef611>{sys_sendto+273} <ffffffff802f0f79>{release_sock+25}
<ffffffff8013bbd1>{local_bh_enable+113}
<ffffffff802f27f2>{sock_setsockopt+1538}
<ffffffff802ef364>{sys_setsockopt+148}
<ffffffff8010ddc2>{system_call+126}
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