vm: add no-mmu vm_iomap_memory() stub (3c0b9de6) · Commits · 戴 / test

I think we could just move the full vm_iomap_memory() function into util.h or similar, but I didn't get any reply from anybody actually using nommu even to this trivial patch, so I'm not going to touch it any more than required. Here's the fairly minimal stub to make the nommu case at least potentially work. It doesn't seem like anybody cares, though. Signed-off-by:

Linus Torvalds <torvalds@linux-foundation.org>

mm/nommu.c

+10 −0

Original line number	Diff line number	Diff line
		@@ -1838,6 +1838,16 @@ int remap_pfn_range(struct vm_area_struct *vma, unsigned long addr,
		}
		EXPORT_SYMBOL(remap_pfn_range);

		int vm_iomap_memory(struct vm_area_struct *vma, phys_addr_t start, unsigned long len)
		{
		unsigned long pfn = start >> PAGE_SHIFT;
		unsigned long vm_len = vma->vm_end - vma->vm_start;

		pfn += vma->vm_pgoff;
		return io_remap_pfn_range(vma, vma->vm_start, pfn, vm_len, vma->vm_page_prot);
		}
		EXPORT_SYMBOL(vm_iomap_memory);

		int remap_vmalloc_range(struct vm_area_struct vma, void addr,
		unsigned long pgoff)
		{

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