iommu/amd: Make amd_iommu_devtable_lock a spin_lock

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Before commit 0bb6e243d7 ("iommu/amd: Support IOMMU_DOMAIN_DMA type
allocation") amd_iommu_devtable_lock had a read_lock() user but now
there are none. In fact, after the mentioned commit we had only
write_lock() user of the lock. Since there is no reason to keep it as
writer lock, change its type to a spin_lock.
I *think* that we might even be able to remove the lock because all its
current user seem to have their own protection.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Sebastian Andrzej Siewior 2018-03-22 16:22:41 +01:00 • committed by Joerg Roedel

parent 993ca6e063

commit 2cd1083d79

1 changed files with 7 additions and 7 deletions

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drivers/iommu/amd_iommu.c

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