Better describe what these functions do. Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Change-Id: I9b60d4c36f518ad966265c8d69f34b226965d0ff Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>