[PATCH 0/3] ARM: vfp: Introduce vfp_lock() for VFP locking.

Ard Biesheuvel ardb at kernel.org
Thu Sep 7 06:53:18 PDT 2023


On Thu, 15 Jun 2023 at 12:17, Sebastian Andrzej Siewior
<bigeasy at linutronix.de> wrote:
>
>
> There was a bug report on PREEMPT_RT which made me look into VFP locking
> on ARM. The usage of local_bh_disable() to ensure exclusive access to
> the VFP unit is not working on PREEMPT_RT because the softirq context is
> preemptible.
>
> This series introduces vfp_lock() which does the right thing.
>
> This series depends on Ard's rewrite of the VFP exception handling:
>         ARM: convert VFP exception handling to C code
>         https://lore.kernel.org/20230522080310.502250-1-ardb@kernel.org
>

For the series,

Reviewed-by: Ard Biesheuvel <ardb at kernel.org>



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