sparc-related comment, to Re: [PATCH V1 07/10] arch/kmap: Ensure kmap_prot visibility

[Christoph Hellwig]

> --- a/arch/sparc/mm/highmem.c
> +++ b/arch/sparc/mm/highmem.c
> @@ -33,6 +33,7 @@
>  #include <asm/vaddrs.h>
>  
>  pgprot_t kmap_prot;
> +EXPORT_SYMBOL(kmap_prot);

Btw, I don't see why sparc needs this as a variable, as there is just
a single assignment to it.

If sparc is sorted out we can always make it a define, and use a define
for kmap_prot that defaults to PAGE_KERNEL, avoiding a little
more duplication.