[PATCH v6 0/4] ARM: vfp: Introduce vfp_state_hold() to acquire VFP context.
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: 2024-07-01 11:03:57
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_vfp_state_hold() which does the right thing. v5…v6: https://lore.kernel.org/all/20240628134648.1852041-1-bigeasy@linutronix.de/ (local) - Rename vfp_{lock/unlock}() to vfp_state_{hold/release}() as suggested by Russell King. v4…v5: - Repost v3…v4: - Repost. v2…v3: https://lore.kernel.org/all/20230926125502.1127015-1-bigeasy@linutronix.de (local) - Repost with Ard's Reviewed-by tag. v1…v2: https://lore.kernel.org/all/20230628080516.798032-1-bigeasy@linutronix.de (local) - Split the last patch into two patches (3 and 4 of this series). Suggested by Ard. v1: https://lore.kernel.org/all/20230615101656.1308942-1-bigeasy@linutronix.de (local)