[Now with the proper subject] Hi,
the commit 5a319350a46572d073042a3194676099dd2c135d has introduces the following warning with CONFIG_DEBUG_PREEMPT enabled: [ 129.314426] BUG: using smp_processor_id() in preemptible [00000000] code: modprobe/5459 [ 129.314580] caller is .kvmppc_book3s_init_hv+0x184/0x350 [kvm_hv] [ 129.314697] CPU: 11 PID: 5459 Comm: modprobe Not tainted 4.11.0-rc3-00022-gc7e790c #1 [ 129.314848] Call Trace: [ 129.314915] [c0000007d624b810] [c0000000023eef10] .dump_stack+0xe4/0x150 (unreliable) [ 129.315065] [c0000007d624b8a0] [c000000001f6ec04] .check_preemption_disabled+0x134/0x150 [ 129.315210] [c0000007d624b940] [d00000000a010274] .kvmppc_book3s_init_hv+0x184/0x350 [kvm_hv] [ 129.315339] [c0000007d624ba00] [c00000000191d5cc] .do_one_initcall+0x5c/0x1c0 [ 129.315416] [c0000007d624bad0] [c0000000023e9494] .do_init_module+0x84/0x240 [ 129.315492] [c0000007d624bb70] [c000000001aade18] .load_module+0x1f68/0x2a10 [ 129.315568] [c0000007d624bd20] [c000000001aaeb30] .SyS_finit_module+0xc0/0xf0 [ 129.315645] [c0000007d624be30] [c00000000191baec] system_call+0x38/0xfc I think that we have to explicitly add a call to preempt_disable to the get_paca() macro with the CONFIG_DEBUG_PREEMPT enabled. Probably we need to create a common accessor function since we already have a special cases like svcpu_get/svcpu_put If you agree I'm going send a patch. Thanks!
