improve the block queue sysfs helper macros

[Christoph Hellwig <hch@xxxxxx>]

Hi Jens,

this series improves the macros to generate the queue sysfs boilerplate.

Diffstat:
 blk-sysfs.c |  272 +++++++++++++-----------------------------------------------
 1 file changed, 63 insertions(+), 209 deletions(-)