Merge tag 'dma-mapping-6.3-2022-02-27' of git://git.infradead.org/users/hch/dma-mapping

Pull dma-mapping updates from Christoph Hellwig:

- remove a not very useful and now unused swiotlb API (Christoph
Hellwig)

- fix a section mismatch (Randy Dunlap)

* tag 'dma-mapping-6.3-2022-02-27' of git://git.infradead.org/users/hch/dma-mapping:
swiotlb: mark swiotlb_memblock_alloc() as __init
swiotlb: remove swiotlb_max_segment

include/linux/swiotlb.h

···
 
 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);
···
 }
 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)
 {

kernel/dma/swiotlb.c

···
 }
 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;
···
 	return;
 }
 
-static void *swiotlb_memblock_alloc(unsigned long nslabs, unsigned int flags,
+static void __init *swiotlb_memblock_alloc(unsigned long nslabs,
+		unsigned int flags,
 		int (*remap)(void *tlb, unsigned long nslabs))
 {
 	size_t bytes = PAGE_ALIGN(nslabs << IO_TLB_SHIFT);