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Date: Tue, 12 Jan 2021 15:16:55 +0200
From: Konstantin Belousov <kostikbel@gmail.com>
To: Emmanuel Vadot <manu@freebsd.org>
Cc: src-committers@freebsd.org, dev-commits-src-all@freebsd.org,
 dev-commits-src-main@freebsd.org
Subject: Re: git: 11d62b6f31ab - main - linuxkpi: add
 kernel_fpu_begin/kernel_fpu_end
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On Tue, Jan 12, 2021 at 11:43:00AM +0000, Emmanuel Vadot wrote:
> The branch main has been updated by manu:
> 
> URL: https://cgit.FreeBSD.org/src/commit/?id=11d62b6f31ab4e99df6d0c6c23406b57eaa37f41
> 
> commit 11d62b6f31ab4e99df6d0c6c23406b57eaa37f41
> Author:     Emmanuel Vadot <manu@FreeBSD.org>
> AuthorDate: 2021-01-12 11:02:38 +0000
> Commit:     Emmanuel Vadot <manu@FreeBSD.org>
> CommitDate: 2021-01-12 11:31:00 +0000
> 
>     linuxkpi: add kernel_fpu_begin/kernel_fpu_end
>     
>     With newer AMD GPUs (>=Navi,Renoir) there is FPU context usage in the
>     amdgpu driver.
>     The `kernel_fpu_begin/end` implementations in drm did not even allow nested
>     begin-end blocks.

Does Linux allow more then one thread to execute kernel_fpu_begin ?