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| author | John Garry <john.garry@linux.dev> | 2026-08-31 09:36:20 +0000 |
|---|---|---|
| committer | Marek Szyprowski <m.szyprowski@samsung.com> | 2026-09-07 18:55:12 +0200 |
| commit | 95d2fec40c483d8a63e5ffa0fa88faeb2e0ed462 (patch) | |
| tree | 8ea38cbf8f312c7a003e08dd88c304574fd9577f /kernel | |
| parent | cee9395acd8043be0644b25c34bfa86623f2b935 (diff) | |
| download | linux-next-95d2fec40c483d8a63e5ffa0fa88faeb2e0ed462.tar.gz linux-next-95d2fec40c483d8a63e5ffa0fa88faeb2e0ed462.zip | |
dma-mapping: rename dma_opt_mapping_size()
Function dma_opt_mapping_size() implies from its name that it returns a
target or sweet spot DMA mapping size. However, it is just an upper limit
optimal DMA mapping size. Above this size, DMA mapping performance may
significantly degrade.
Rename to dma_max_opt_mapping_size() to reflect the real behaviour. Also
rename the internal DMA mapping symbols to align with this.
The DMA API documentation already described this behaviour properly (so
there is nothing to update).
Signed-off-by: John Garry <john.garry@linux.dev>
Link: https://lore.kernel.org/r/20260831093620.3481337-1-john.g.garry@oracle.com
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/dma/mapping.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c index bf2651a70b7c..82e701648d60 100644 --- a/kernel/dma/mapping.c +++ b/kernel/dma/mapping.c @@ -1012,19 +1012,19 @@ size_t dma_max_mapping_size(struct device *dev) } EXPORT_SYMBOL_GPL(dma_max_mapping_size); -size_t dma_opt_mapping_size(struct device *dev) +size_t dma_max_opt_mapping_size(struct device *dev) { const struct dma_map_ops *ops = get_dma_ops(dev); size_t size = SIZE_MAX; if (use_dma_iommu(dev)) - size = iommu_dma_opt_mapping_size(); - else if (ops && ops->opt_mapping_size) - size = ops->opt_mapping_size(); + size = iommu_dma_max_opt_mapping_size(); + else if (ops && ops->max_opt_mapping_size) + size = ops->max_opt_mapping_size(); return min(dma_max_mapping_size(dev), size); } -EXPORT_SYMBOL_GPL(dma_opt_mapping_size); +EXPORT_SYMBOL_GPL(dma_max_opt_mapping_size); unsigned long dma_get_merge_boundary(struct device *dev) { |