Created attachment 948092 [details]
Soft Lockup screen from AMD Phenom II X4 940

Description of problem:
Recent version of kernel 3.17.x causes soft lockup on AMD Phenom II X4 940 similar to rhbz #1147696 and rhbz#1150582.

Version-Release number of selected component (if applicable):
All 3.17 series

How reproducible:
Always

Steps to Reproduce:
1. Simpy boot with latest 3.17
2.
3.

Actual results:
Soft lock

Expected results:
Boot normally

Additional info:
See screenshot
System specification
$ cat /proc/cpuinfo 
processor	: 0
vendor_id	: AuthenticAMD
cpu family	: 16
model		: 4
model name	: AMD Phenom(tm) II X4 940 Processor
stepping	: 2
microcode	: 0x10000db
cpu MHz		: 800.000
cache size	: 512 KB
physical id	: 0
siblings	: 4
core id		: 0
cpu cores	: 4
apicid		: 0
initial apicid	: 0
fpu		: yes
fpu_exception	: yes
cpuid level	: 5
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt hw_pstate npt lbrv svm_lock nrip_save
bogomips	: 5999.99
TLB size	: 1024 4K pages
clflush size	: 64
cache_alignment	: 64
address sizes	: 48 bits physical, 48 bits virtual
power management: ts ttp tm stc 100mhzsteps hwpstate