NAME    [Toc]    [Back]

       BUF_UNLOCK - General: Unlocks the specified I/O buffer

SYNOPSIS    [Toc]    [Back]

       void BUF_UNLOCK(
               struct buf *bp );

ARGUMENTS    [Toc]    [Back]

       Specifies a pointer to a buf structure.

DESCRIPTION    [Toc]    [Back]

       The  BUF_UNLOCK  routine  unlocks the specified I/O buffer
       that was locked in a previous call to BUF_LOCK.  The  routine
  masks  all  disk  and tape controller interrupts (by
       calling the splbio routine). It resets the  mutual  exclusion
  buffer  lock  member,  b_lock,  of the specified buf
       structure pointer.

       The BUF_UNLOCK routine then resets the b_flags  member  of
       the  specified buf structure pointer to indicate that this
       buffer is not being used. Finally, BUF_UNLOCK  resets  the
       CPU priority level (by calling the splx routine).

NOTES    [Toc]    [Back]

       You  must  have locked the specified I/O buffer by calling
       BUF_LOCK prior to calling the BUF_UNLOCK routine.

RETURN VALUES    [Toc]    [Back]

       None

SEE ALSO    [Toc]    [Back]

       Routines: BUF_LOCK(9r)



                                                   BUF_UNLOCK(9r)