code review from Josh and Robert

*** 35,72 ****
  .Sh INTERFACE LEVEL
  illumos DDI specific
  .Sh PARAMETERS
  .Bl -tag -width Ds
  .It Fa vmp
! The vmem arena to walk
  .It Fa typemask
! A bitmask indicating the types of segment to operate on
  .Bl -tag -width Ds
  .It Dv VMEM_ALLOC
! Allocated segments
  .It Dv VMEM_FREE
! Free segments
  .El
  .It Fa func
  The function to apply to each segment matching
  .Fa typemask .
  .Fa func
! should be of 3 values and return void:
  .Bl -tag -width Ds
  .It Fa "void *arg"
  The
  .Fa arg
  passed to
! .Fn vmem_walk
  .It Fa "void *vaddr"
! The base address of the segment
  .It Fa "size_t size"
! The size of the segment
  .El
  .It Fa arg
  An arbitrary argument passed to each call to
! .Fn func
  .El
  .Sh DESCRIPTION
  .Fn vmem_walk
  walks each segment in the arena
  .Fa vmp
--- 35,72 ----
  .Sh INTERFACE LEVEL
  illumos DDI specific
  .Sh PARAMETERS
  .Bl -tag -width Ds
  .It Fa vmp
! The vmem arena to walk.
  .It Fa typemask
! A bitmask indicating the types of segment to operate on.
  .Bl -tag -width Ds
  .It Dv VMEM_ALLOC
! Allocated segments.
  .It Dv VMEM_FREE
! Free segments.
  .El
  .It Fa func
  The function to apply to each segment matching
  .Fa typemask .
  .Fa func
! should accept 3 arguments and return void:
  .Bl -tag -width Ds
  .It Fa "void *arg"
  The
  .Fa arg
  passed to
! .Fn vmem_walk .
  .It Fa "void *vaddr"
! The base address of the segment.
  .It Fa "size_t size"
! The size of the segment.
  .El
  .It Fa arg
  An arbitrary argument passed to each call to
! .Fn func .
  .El
  .Sh DESCRIPTION
  .Fn vmem_walk
  walks each segment in the arena
  .Fa vmp