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authorPaolo Bonzini <pbonzini@redhat.com>2013-05-06 10:26:13 +0200
committerPaolo Bonzini <pbonzini@redhat.com>2013-07-04 17:42:49 +0200
commit99e86347fe960b95514531f84282438ae4e6ca64 (patch)
tree86b4925c59450fbcf49628cec2007b7402346f6b /memory.c
parent5444e768ee1abe6e021bece19a9a932351f88c88 (diff)
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>
Diffstat (limited to 'memory.c')
-rw-r--r--memory.c31
1 files changed, 21 insertions, 10 deletions
diff --git a/memory.c b/memory.c
index 543e0cc7c8..4449462d3f 100644
--- a/memory.c
+++ b/memory.c
@@ -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,