On 31.10.14 04:47, Anton Blanchard wrote: > LLVM doesn't support local named register variables and is unlikely > to. current_thread_info is using one, fix it by moving it out and > calling it __current_r1(). > > I gave it a bit of an obscure name because we don't want anyone else > using it - they should use current_stack_pointer(). This specific > case is performance critical and we can't afford to call a function > to get it. Furthermore it isn't important to know exactly where in > the stack we are since we mask the lower bits. > > Signed-off-by: Anton Blanchard <an...@samba.org>
Git bisect managed to point me to this commit as the offender for OOPSes on e5500 and e6500 (and maybe the G4 as well, not sure). Doing a git revert of this commit on top of linus/master makes things work fine for me again. Alex Oops: Kernel access of bad area, sig: 11 [#2] SMP NR_CPUS=16 CoreNet Generic Modules linked in: CPU: 1 PID: 339 Comm: kworker/1:1 Tainted: G D 3.18.0-09423-g988adfd #1 Workqueue: rpciod .rpc_async_schedule task: c0000001f6397500 ti: c0000001f6638000 task.ti: c0000001f6638000 NIP: c0000000004817a4 LR: c0000000004817a4 CTR: 0000000000000000 REGS: c0000001f663b0e0 TRAP: 0300 Tainted: G D (3.18.0-09423-g988adfd) MSR: 0000000080029000 <CE,EE,ME> CR: 24ad2e42 XER: 00000000 DEAR: 202031303438355f ESR: 0000000000000000 SOFTE: 1 GPR00: c0000000004817a4 c0000001f663b360 c000000000988028 000000007f24333d GPR04: 5ff5738c1f2ebfb1 0000000000000000 0000000000000000 00000000000008f8 GPR08: c000000000480ae8 2020313034383537 36204b4220617320 6469726563740a31 GPR12: 3937302d30312d30 c00000000fff8780 c00000000007f988 c0000001f64c1600 GPR16: 0000000000000000 0000000000000000 0000000000000000 00000000000005dc GPR20: c0000000009b8028 c00000007e034200 0000000000000548 c000000000000000 GPR24: c0000001f663b4b0 00000000b225831e 0000000000000000 0000000000000080 GPR28: 0000000000000548 00000000000008f8 0000000000000548 0000000000000094 NIP [c0000000004817a4] .__skb_checksum+0x194/0x378 LR [c0000000004817a4] .__skb_checksum+0x194/0x378 Call Trace: [c0000001f663b360] [c0000000004817a4] .__skb_checksum+0x194/0x378 (unreliable) [c0000001f663b440] [c0000000004819b4] .skb_checksum+0x2c/0x3c [c0000001f663b4c0] [c0000000004fd0a8] .udp4_hwcsum+0xa8/0x16c [c0000001f663b560] [c0000000004fd440] .udp_send_skb+0x2d4/0x370 [c0000001f663b600] [c0000000004fd51c] .udp_push_pending_frames+0x40/0x94 [c0000001f663b680] [c0000000004fec08] .udp_sendpage+0x150/0x1b4 [c0000001f663b770] [c00000000050ae54] .inet_sendpage+0xa0/0x120 [c0000001f663b810] [c00000000059c8cc] .xs_sendpages+0x2d0/0x30c [c0000001f663b8d0] [c00000000059cae4] .xs_udp_send_request+0x58/0x120 [c0000001f663b970] [c000000000598f04] .xprt_transmit+0x80/0x36c [c0000001f663ba20] [c0000000005942d8] .call_transmit+0x19c/0x254 [c0000001f663bab0] [c00000000059ff64] .__rpc_execute+0xbc/0x3c0 [c0000001f663bb90] [c0000000000797f8] .process_one_work+0x1c0/0x474 [c0000001f663bc40] [c00000000007a518] .worker_thread+0x17c/0x54c [c0000001f663bd30] [c00000000007fa8c] .kthread+0x104/0x124 [c0000001f663be30] [c000000000000884] .ret_from_kernel_thread+0x58/0xd4 Instruction dump: 7d1f3a14 7c6a1850 e9580000 7fbd4050 786334e4 e90a0000 7c63ba14 f8490028 7c63ea14 7d0903a6 e84a0008 4e800421 <e8490028> 7c641b78 78270464 e9580008 ---[ end trace 51b7414695b0cafe ]--- note: kworker/1:1[339] exited with preempt_count 1 Unable to handle kernel paging request for data at address 0xffffffffffffffd8 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
