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swiotlb: remove swiotlb_max_segment

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swiotlb_max_segment has always been a bogus API, so remove it now that
the remaining callers are gone.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
This commit is contained in:
Christoph Hellwig
2023-02-16 07:24:19 +01:00
parent 033c40a89f
commit 5e7b9a6ae8
2 changed files with 0 additions and 13 deletions
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include/linux/swiotlb.h
-5
View File
@@ -121,7 +121,6 @@ static inline bool is_swiotlb_force_bounce(struct device *dev)
void swiotlb_init(bool addressing_limited, unsigned int flags);
void __init swiotlb_exit(void);
unsigned int swiotlb_max_segment(void);
size_t swiotlb_max_mapping_size(struct device *dev);
bool is_swiotlb_active(struct device *dev);
void __init swiotlb_adjust_size(unsigned long size);
@@ -140,10 +139,6 @@ static inline bool is_swiotlb_force_bounce(struct device *dev)
static inline void swiotlb_exit(void)
{
}
static inline unsigned int swiotlb_max_segment(void)
{
return 0;
}
static inline size_t swiotlb_max_mapping_size(struct device *dev)
{
return SIZE_MAX;
kernel/dma/swiotlb.c
-8
View File
@@ -156,14 +156,6 @@ setup_io_tlb_npages(char *str)
}
early_param("swiotlb", setup_io_tlb_npages);
unsigned int swiotlb_max_segment(void)
{
if (!io_tlb_default_mem.nslabs)
return 0;
return rounddown(io_tlb_default_mem.nslabs << IO_TLB_SHIFT, PAGE_SIZE);
}
EXPORT_SYMBOL_GPL(swiotlb_max_segment);
unsigned long swiotlb_size_or_default(void)
{
return default_nslabs << IO_TLB_SHIFT;