[off-list] a path toward killing thread_info

[Andy Lutomirski]

https://git.kernel.org/cgit/linux/kernel/git/luto/linux.git/commit/?h=x86/vmap_stack&id=50d6cef284e80678c2065813b54bf525d1202d0f

It's fairly straightforward, it's arguably a cleanup, and, with it
applied, there are very few references to 'thread_info' left in the
core kernel at all.

PeterZ, I'm thinking of adding task_ti_flags_ptr to directly find the
ti flags word given a task_struct * so the scheduler can use it.  Does
that seem reasonable to you?

Ingo, lockdep tracks mutex owners by thread_info *.  Is there any good
reason for this?  Can I just use task_struct *?  If we do that, I
think thread_info will be *gone* from the core.

--Andy

-- 
Andy Lutomirski
AMA Capital Management, LLC