ARM: 9424/1: vfp: Use vfp_state_hold() in vfp_sync_hwstate().

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vfp_sync_hwstate() uses preempt_disable() followed by local_bh_disable()
to ensure that it won't get interrupted while checking the VFP state.
This harms PREEMPT_RT because softirq handling can get preempted and
local_bh_disable() synchronizes the related section with a sleeping lock
which does not work with disabled preemption.

Use the vfp_state_hold() to synchronize the access.

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>

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Sebastian Andrzej Siewior 2024-10-02 17:16:33 +01:00 • committed by Russell King (Oracle)

parent f26bdbe1fa

commit b54cdbad4a

1 changed files with 3 additions and 6 deletions

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arch/arm/vfp/vfpmodule.c

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