Eric B Munson writes:

Currently when a 32 bit process is exec'd on a powerpc 64 bit host the values
of the top three bytes of the personality are clobbered.  This patch adds a
check in the SET_PERSONALITY macro that will carry all the values in the top
three bytes across the exec.

Signed-off-by: Eric B Munson <redacted>

Your commit message needs to remind us what is in those bytes, and
tell us what bad things happen if we don't keep them, and what is the
benefit of keeping them.  And if there are any user-visible aspects of
this change, they need to be flagged.

Paul.