iommu/iova: Use raw_cpu_ptr() instead of get_cpu_ptr() for ->fq

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get_cpu_ptr() disabled preemption and returns the ->fq object of the
current CPU. raw_cpu_ptr() does the same except that it not disable
preemption which means the scheduler can move it to another CPU after it
obtained the per-CPU object.
In this case this is not bad because the data structure itself is
protected with a spin_lock. This change shouldn't matter however on RT
it does because the sleeping lock can't be accessed with disabled
preemption.

Cc: Joerg Roedel <joro@8bytes.org>
Cc: iommu@lists.linux-foundation.org
Reported-by: vinadhy@gmail.com
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

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Sebastian Andrzej Siewior 2017-09-21 17:21:40 +02:00 • committed by Alex Williamson

parent a593472591

commit 94e2cc4dba

1 changed files with 1 additions and 3 deletions

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drivers/iommu/iova.c

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