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exec.c: get nodes_nb_alloc with one MAX calculation

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The purpose of these two MAX here is to get the maximum of these three
variables:

    A: map->nodes_nb + nodes
    B: map->nodes_nb_alloc
    C: alloc_hint

We can write it like MAX(A, B, C). Since the if condition says A > B,
this means MAX(A, B, C) = MAX(A, C).

This patch just simplify the calculation a bit.

Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
Message-Id: <20190321082555.21118-4-richardw.yang@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Wei Yang 2019-03-21 16:25:52 +08:00 committed by Paolo Bonzini
parent 56b1507680
commit c95cfd0400
1 changed files with 1 additions and 2 deletions
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exec.c
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@ -227,8 +227,7 @@ static void phys_map_node_reserve(PhysPageMap *map, unsigned nodes)
{
static unsigned alloc_hint = 16;
if (map->nodes_nb + nodes > map->nodes_nb_alloc) {
map->nodes_nb_alloc = MAX(map->nodes_nb_alloc, alloc_hint);
map->nodes_nb_alloc = MAX(map->nodes_nb_alloc, map->nodes_nb + nodes);
map->nodes_nb_alloc = MAX(alloc_hint, map->nodes_nb + nodes);
map->nodes = g_renew(Node, map->nodes, map->nodes_nb_alloc);
alloc_hint = map->nodes_nb_alloc;
}