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iommu: Remove the ->map_sg indirection

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All iommu drivers use the default_iommu_map_sg implementation, and there
is no good reason to ever override it.  Just expose it as iommu_map_sg
directly and remove the indirection, specially in our post-spectre world
where indirect calls are horribly expensive.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Christoph Hellwig
2018-07-30 09:36:26 +02:00
committed by Joerg Roedel
parent 58d1131777
commit d88e61faad
16 changed files with 5 additions and 31 deletions
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6
drivers/iommu/iommu.c
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@@ -1673,8 +1673,8 @@ size_t iommu_unmap_fast(struct iommu_domain *domain,
}
EXPORT_SYMBOL_GPL(iommu_unmap_fast);
size_t default_iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
struct scatterlist *sg, unsigned int nents, int prot)
size_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
struct scatterlist *sg, unsigned int nents, int prot)
{
struct scatterlist *s;
size_t mapped = 0;
@@ -1714,7 +1714,7 @@ out_err:
return 0;
}
EXPORT_SYMBOL_GPL(default_iommu_map_sg);
EXPORT_SYMBOL_GPL(iommu_map_sg);
int iommu_domain_window_enable(struct iommu_domain *domain, u32 wnd_nr,
phys_addr_t paddr, u64 size, int prot)