On Thu, 2018-04-05 at 09:27 -0400, Dave Anderson wrote:
 
 ----- Original Message -----
 > Greetings,
 > 
 > I know absolutely nothing about how crash maintenance is done, and very
 > damn little about crash's gizzard, so please consider the below a bug
 > report, a patch.. or bloody annoying spam, as you see fit.
 
 Hi Mike,
 
 No, it's most definitely appreciated.  Normally patches are posted on the
 crash utility mailing list (crash-utility(a)redhat.com), but this is fine.
 
 And speaking of the mailing list, there was a bug report and subsequent 
 thread yesterday concerning this issue:
 
   
https://www.redhat.com/archives/crash-utility/2018-April/msg00000.html
 
 It was unresolved because the thread_union still exists in the most
 recent upstream sources, and I can still see the union declaration
 in the most recent Fedora kernel. 
It still exists, but...
homer:..kernel/linux-4.15 # objdump -t vmlinux|grep thread_union
                              
ffffffff81e00000 g     O .data  0000000000004000 init_thread_union
                                            ^^^^
homer:..kernel/linux-master # objdump -t vmlinux|grep thread_union
ffffffff81e00000 g       .data  0000000000000000 init_thread_union
                                            ^^^^
...it's size went missing at the referenced commit.
	-Mike