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memory: access FlatView from a local variable 

We will soon require accesses to as->current_map to be placed under
a lock (with reference counting so as to keep the critical section
small).  To simplify this change, always fetch as->current_map into
a local variable and access it through that variable.

Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2013-05-06 10:26:13 +02:00
parent 5444e768ee
commit 99e86347fe
1 changed files with 21 additions and 10 deletions
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31
memory.c
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@ -578,13 +578,15 @@ static void address_space_add_del_ioeventfds(AddressSpace *as,
static void address_space_update_ioeventfds(AddressSpace *as)
{
FlatView *view;
FlatRange *fr;
unsigned ioeventfd_nb = 0;
MemoryRegionIoeventfd *ioeventfds = NULL;
AddrRange tmp;
unsigned i;
FOR_EACH_FLAT_RANGE(fr, as->current_map) {
view = as->current_map;
FOR_EACH_FLAT_RANGE(fr, view) {
for (i = 0; i < fr->mr->ioeventfd_nb; ++i) {
tmp = addrrange_shift(fr->mr->ioeventfds[i].addr,
int128_sub(fr->addr.start,
@ -1144,7 +1146,8 @@ void memory_region_sync_dirty_bitmap(MemoryRegion *mr)
FlatRange *fr;
QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
FOR_EACH_FLAT_RANGE(fr, as->current_map) {
FlatView *view = as->current_map;
FOR_EACH_FLAT_RANGE(fr, view) {
if (fr->mr == mr) {
MEMORY_LISTENER_UPDATE_REGION(fr, as, Forward, log_sync);
}
@ -1194,12 +1197,14 @@ void *memory_region_get_ram_ptr(MemoryRegion *mr)
static void memory_region_update_coalesced_range_as(MemoryRegion *mr, AddressSpace *as)
{
FlatView *view;
FlatRange *fr;
CoalescedMemoryRange *cmr;
AddrRange tmp;
MemoryRegionSection section;
FOR_EACH_FLAT_RANGE(fr, as->current_map) {
view = as->current_map;
FOR_EACH_FLAT_RANGE(fr, view) {
if (fr->mr == mr) {
section = (MemoryRegionSection) {
.address_space = as,
@ -1490,9 +1495,9 @@ static int cmp_flatrange_addr(const void *addr_, const void *fr_)
return 0;
}
static FlatRange *address_space_lookup(AddressSpace *as, AddrRange addr)
static FlatRange *flatview_lookup(FlatView *view, AddrRange addr)
{
return bsearch(&addr, as->current_map->ranges, as->current_map->nr,
return bsearch(&addr, view->ranges, view->nr,
sizeof(FlatRange), cmp_flatrange_addr);
}
@ -1513,6 +1518,7 @@ MemoryRegionSection memory_region_find(MemoryRegion *mr,
MemoryRegion *root;
AddressSpace *as;
AddrRange range;
FlatView *view;
FlatRange *fr;
addr += mr->addr;
@ -1523,13 +1529,14 @@ MemoryRegionSection memory_region_find(MemoryRegion *mr,
as = memory_region_to_address_space(root);
range = addrrange_make(int128_make64(addr), int128_make64(size));
fr = address_space_lookup(as, range);
view = as->current_map;
fr = flatview_lookup(view, range);
if (!fr) {
return ret;
}
while (fr > as->current_map->ranges
&& addrrange_intersects(fr[-1].addr, range)) {
while (fr > view->ranges && addrrange_intersects(fr[-1].addr, range)) {
--fr;
}
@ -1549,9 +1556,11 @@ MemoryRegionSection memory_region_find(MemoryRegion *mr,
void address_space_sync_dirty_bitmap(AddressSpace *as)
{
FlatView *view;
FlatRange *fr;
FOR_EACH_FLAT_RANGE(fr, as->current_map) {
view = as->current_map;
FOR_EACH_FLAT_RANGE(fr, view) {
MEMORY_LISTENER_UPDATE_REGION(fr, as, Forward, log_sync);
}
}
@ -1571,6 +1580,7 @@ void memory_global_dirty_log_stop(void)
static void listener_add_address_space(MemoryListener *listener,
AddressSpace *as)
{
FlatView *view;
FlatRange *fr;
if (listener->address_space_filter
@ -1584,7 +1594,8 @@ static void listener_add_address_space(MemoryListener *listener,
}
}
FOR_EACH_FLAT_RANGE(fr, as->current_map) {
view = as->current_map;
FOR_EACH_FLAT_RANGE(fr, view) {
MemoryRegionSection section = {
.mr = fr->mr,
.address_space = as,