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Commit bad849b3 authored by David Howells's avatar David Howells Committed by Linus Torvalds
Browse files

NOMMU: Stub out vm_get_page_prot() if there's no MMU 



Stub out vm_get_page_prot() if there's no MMU.

This was added by commit 804af2cf ("[AGPGART] remove private page
protection map") and is used in commit c07fbfd1 ("fbmem: VM_IO set,
but not propagated") in the fbmem video driver, but the function doesn't
exist on NOMMU, resulting in an undefined symbol at link time.

Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
Reviewed-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 0a3b6e45

include/linux/mm.h

+8 −0
Original line number Diff line number Diff line
@@ -1363,7 +1363,15 @@ static inline unsigned long vma_pages(struct vm_area_struct *vma) 
	return (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;

}



#ifdef CONFIG_MMU

pgprot_t vm_get_page_prot(unsigned long vm_flags);

#else

static inline pgprot_t vm_get_page_prot(unsigned long vm_flags)

{

	return __pgprot(0);

}

#endif



struct vm_area_struct *find_extend_vma(struct mm_struct *, unsigned long addr);

int remap_pfn_range(struct vm_area_struct *, unsigned long addr,

			unsigned long pfn, unsigned long size, pgprot_t);