mm: clarify a confusing comment for remap_pfn_range()
It really made me scratch my head. Replace the comment with an accurate and consistent description. The parameter pfn actually refers to the page frame number which is right-shifted by PAGE_SHIFT from the physical address. Signed-off-by: WANG Wenhu <wenhu.wang@vivo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Link: http://lkml.kernel.org/r/20200310073955.43415-1-wenhu.wang@vivo.comSigned-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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