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memory: Align MemoryRegionSections fields 

MemoryRegionSection includes an Int128 'size' field;
on some platforms the compiler causes an alignment of this to
a 128bit boundary, leaving 8 bytes of dead space.
This deadspace can be filled with junk.

Move the size field to the top avoiding unnecessary alignment.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190814175535.2023-2-dgilbert@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
stable-4.2
Dr. David Alan Gilbert 2019-08-14 18:55:33 +01:00 committed by Michael S. Tsirkin
parent 240ab11fb7
commit 44f85d3276
1 changed files with 1 additions and 1 deletions
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2
include/exec/memory.h
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@ -495,10 +495,10 @@ static inline FlatView *address_space_to_flatview(AddressSpace *as)
* @nonvolatile: this section is non-volatile
*/
struct MemoryRegionSection {
Int128 size;
MemoryRegion *mr;
FlatView *fv;
hwaddr offset_within_region;
Int128 size;
hwaddr offset_within_address_space;
bool readonly;
bool nonvolatile;