From: Stephen Smalley <sds@epoch.ncsc.mil>

This patch against 2.6.0-test3-mm3 adds calls to the security_task_to_inode
hook to the pid*_revalidate functions to ensure that the inode security field
is also updated appropriately for /proc/pid inodes.  This corresponds with
the uid/gid update performed by the proc-pid-setuid-ownership-fix.patch that
is already in -mm3.