Re: [PATCH 1/2] x86/fpu: Reset MXCSR to default in kernel_fpu_begin()

[Petteri Aimonen]

> We want to make sure that GCC puts things in the right order.  I
> suppose that even a memory clobber is insufficient here, though.

amdgpu worked around that by using a noinline function:
https://github.com/torvalds/linux/commit/59dfb0c64d3853d20dc84f4561f28d4f5a2ddc7d#diff-a82b8ab0e6b4f9abfd3344d1427d765f

If there is something that would help, it would have to be an
attribute added to kernel_fpu_begin() in the header. Any barriers
inside the function will be invisible to code generation in other
compilation units.

--
Petteri