suse man page for deactivate_super

DEACTIVATE_SUPER(9)						   The Linux VFS					       DEACTIVATE_SUPER(9)

NAME
       deactivate_super - drop an active reference to superblock

SYNOPSIS
       void deactivate_super(struct super_block * s);

ARGUMENTS
       s
	   superblock to deactivate

DESCRIPTION
       Drops an active reference to superblock, acquiring a temprory one if there is no active references left. In that case we lock superblock,
       tell fs driver to shut it down and drop the temporary reference we had just acquired.

COPYRIGHT
Kernel Hackers Manual 2.6.					     July 2010						       DEACTIVATE_SUPER(9)