Messages in this thread Patch in this message | | | From | Tianyu Lan <> | Subject | [PATCH] Swiotlb: Add CONFIG_HAS_IOMEM check around memremap() in the swiotlb_mem_remap() | Date | Fri, 31 Dec 2021 11:56:40 -0500 |
| |
From: Tianyu Lan <Tianyu.Lan@microsoft.com>
HAS_IOMEM option may not be selected on some platforms(e.g, s390) and this will cause compile error due to miss memremap() implementation. Fix it via adding HAS_IOMEM check around memremap() in the swiotlb.c.
Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com> --- kernel/dma/swiotlb.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index b36c1cdd0c4f..3de651ba38cc 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -167,6 +167,7 @@ static void *swiotlb_mem_remap(struct io_tlb_mem *mem, unsigned long bytes) { void *vaddr = NULL; +#ifdef CONFIG_HAS_IOMEM if (swiotlb_unencrypted_base) { phys_addr_t paddr = mem->start + swiotlb_unencrypted_base; @@ -175,6 +176,7 @@ static void *swiotlb_mem_remap(struct io_tlb_mem *mem, unsigned long bytes) pr_err("Failed to map the unencrypted memory %pa size %lx.\n", &paddr, bytes); } +#endif return vaddr; } -- 2.25.1
| |