Re: [GIT PULL] UML fixes for 4.4-rc5

[Richard Weinberger <richard@nod.at>]

Linus,

Am 09.12.2015 um 02:35 schrieb Linus Torvalds:
> On Tue, Dec 8, 2015 at 1:39 PM, Richard Weinberger <richard@nod.at> wrote:
>>
>> This pull request contains various bug fixes, most of them are
>> fall out from the merge window.
>>
>> Richard Weinberger (2):
>>       um: Fix fpstate handling
> 
> Ugh. This is very ugly. It's apparently the result of commit
> 530e5c827182 ("x86/headers: Make sigcontext pointers bit independent")
> and apparently nobody noticed the uml fallout.
> 
> I've pulled, but I wanted the x86 people involved to be aware of this
> ugly corner. I wonder if there might be some way for uml to continue
> to use that fpstate entry as a pointer, at least when the wordsize
> matches (which it will)?

I agree. One way to get rid of the ugliness would be rewriting UML's
FP code. The code is very old and doing it like x86 does would be a
good thing anyway. But that's nothing I'll do at this stage of development.
That's material for the next merge window.

Thanks,
//richard