tree 17910bdca2cee81b0d4a3ee877aec82db0017a09
parent c483934670d31e064e18967bb679c1079b54ea72
author Rusty Russell <rusty@rustcorp.com.au> 1205812695 -0500
committer Rusty Russell <rusty@rustcorp.com.au> 1205755099 +1100

virtio: handle > 2 billion page balloon targets

If the host asks for a huge target towards_target() can overflow, and
we up oops as we try to release more pages than we have.  The simple
fix is to use a 64-bit value.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>