util: MAX_FROM_BITS() should be unsigned

MAX_FROM_BITS() computes the maximum value representable in a number of
bits.  The expression for that is an unsigned value, but we explicitly cast
it to a signed int.  It looks like this is because one of the main users is
for FD_REF_MAX, which is used to bound fd values, typically stored as a
signed int.

The value MAX_FROM_BITS() is calculating is naturally non-negative, though,
so it makes more sense for it to be unsigned, and to move the case to the
definition of FD_REF_MAX.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

0 files changed, 0 insertions, 0 deletions