Sebastian Andrzej Siewior f26bdbe1fa ARM: 9423/1: vfp: Provide vfp_state_hold() for VFP locking. ... kernel_neon_begin() uses local_bh_disable() to ensure exclusive access to the VFP unit. This is broken on PREEMPT_RT because a BH disabled section remains preemptible on PREEMPT_RT. Introduce vfp_state_hold() which uses local_bh_disable() and preempt_disable() on PREEMPT_RT. Since softirqs are processed always in thread context, disabling preemption is enough to ensure that the current context won't get interrupted by something that is using the VFP. Use it in kernel_neon_begin(). Reviewed-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>		2024-11-12 16:41:46 +00:00
..
Makefile	ARM: vfp: Use undef hook for handling VFP exceptions	2023-05-17 15:08:22 +02:00
vfp.h	ARM: vfp: Reimplement VFP exception entry in C code	2023-05-17 15:08:14 +02:00
vfpdouble.c	ARM: 8026/1: Fix emulation of multiply accumulate instructions	2014-04-14 23:28:24 +01:00
vfphw.S	ARM: vfp: Reimplement VFP exception entry in C code	2023-05-17 15:08:14 +02:00
vfpinstr.h	ARM: 9410/1: vfp: Use asm volatile in fmrx/fmxr macros	2024-08-20 11:18:47 +01:00
vfpmodule.c	ARM: 9423/1: vfp: Provide vfp_state_hold() for VFP locking.	2024-11-12 16:41:46 +00:00
vfpsingle.c	ARM: convert printk(KERN_* to pr_*	2014-11-21 15:24:50 +00:00