way writes are handled: Add KERNFS_XREAD and KERNFS_FILEOP_WRITE files
operations definitions to kfsfileop, a xread function pointer to
kernfs_fileop, rename kernfs_read to kernfs_default_xread and add a
kernfs_read calling kernfs_try_fileop(KERNFS_FILEOP_READ).
Proposed on tech-kern on Feb 18 2006.