HAS_IOMEM option may not be selected on some platforms (e.g, s390) and this will cause compilation failure due to missing memremap() implementation. Fix it by stubbing out swiotlb_mem_remap when CONFIG_HAS_IOMEM is not set.
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| @@ -163,6 +163,7 @@ static inline unsigned long nr_slots(u64 val) · 162 unmodified lines | |||
| 163 | * when swiotlb_unencrypted_base is set. (e.g. for Hyper-V AMD SEV-SNP | 163 | * when swiotlb_unencrypted_base is set. (e.g. for Hyper-V AMD SEV-SNP |
| 164 | * Isolation VMs). | 164 | * Isolation VMs). |
| 165 | */ | 165 | */ |
| 166 | #ifdef CONFIG_HAS_IOMEM | ||
| 166 | static void *swiotlb_mem_remap(struct io_tlb_mem *mem, unsigned long bytes) | 167 | static void *swiotlb_mem_remap(struct io_tlb_mem *mem, unsigned long bytes) |
| 167 | { | 168 | { |
| 168 | void *vaddr = NULL; | 169 | void *vaddr = NULL; |
| @@ -178,6 +179,12 @@ static void *swiotlb_mem_remap(struct io_tlb_mem *mem, unsigned long bytes) · 9 unmodified lines | |||
| 178 | 179 | ||
| 179 | return vaddr; | 180 | return vaddr; |
| 180 | } | 181 | } |
| 182 | #else | ||
| 183 | static void *swiotlb_mem_remap(struct io_tlb_mem *mem, unsigned long bytes) | ||
| 184 | { | ||
| 185 | return NULL; | ||
| 186 | } | ||
| 187 | #endif | ||
| 181 | 188 | ||
| 182 | /* | 189 | /* |
| 183 | * Early SWIOTLB allocation may be too early to allow an architecture to | 190 | * Early SWIOTLB allocation may be too early to allow an architecture to |