KVM: Fix overflow bug in overflow detection code

The expression

   sp - 6 < sp

where sp is a u16 is undefined in C since 'sp - 6' is promoted to int,
and signed overflow is undefined in C.  gcc 4.2 actually warns about it.
Replace with a simpler test.

Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Eric Sesterhenn / Snakebyte 2007-04-09 16:15:05 +02:00 committed by Avi Kivity
commit 3964994bb5