diff options
| author | Wei Liu <wei.liu@kernel.org> | 2022-01-04 16:11:19 +0000 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2022-01-04 16:11:19 +0000 |
| commit | 2deb55d9f57bb7a877c0d77115cc4077e1e974ff (patch) | |
| tree | 1c808331a97c6809ea2378f6f10b3ccb686d2dd9 /kernel/dma | |
| parent | e1878402ab2dca12d1426f2fea39757943f3332c (diff) | |
| download | linux-2deb55d9f57bb7a877c0d77115cc4077e1e974ff.tar.gz | |
swiotlb: Add CONFIG_HAS_IOMEM check around swiotlb_mem_remap()
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.
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'kernel/dma')
| -rw-r--r-- | kernel/dma/swiotlb.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index b36c1cdd0c4fd..f1e7ea160b433 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -163,6 +163,7 @@ static inline unsigned long nr_slots(u64 val) * when swiotlb_unencrypted_base is set. (e.g. for Hyper-V AMD SEV-SNP * Isolation VMs). */ +#ifdef CONFIG_HAS_IOMEM static void *swiotlb_mem_remap(struct io_tlb_mem *mem, unsigned long bytes) { void *vaddr = NULL; @@ -178,6 +179,12 @@ static void *swiotlb_mem_remap(struct io_tlb_mem *mem, unsigned long bytes) return vaddr; } +#else +static void *swiotlb_mem_remap(struct io_tlb_mem *mem, unsigned long bytes) +{ + return NULL; +} +#endif /* * Early SWIOTLB allocation may be too early to allow an architecture to |