diff --git a/hw/cuda.c b/hw/cuda.c
index 40774360df..233ab666da 100644
--- a/hw/cuda.c
+++ b/hw/cuda.c
@@ -634,7 +634,7 @@ static uint32_t cuda_readl (void *opaque, target_phys_addr_t addr)
     return 0;
 }
 
-static MemoryRegionOps cuda_ops = {
+static const MemoryRegionOps cuda_ops = {
     .old_mmio = {
         .write = {
             cuda_writeb,
diff --git a/hw/ide/ahci.c b/hw/ide/ahci.c
index 041ce1e89f..a883a920be 100644
--- a/hw/ide/ahci.c
+++ b/hw/ide/ahci.c
@@ -367,7 +367,7 @@ static void ahci_mem_write(void *opaque, target_phys_addr_t addr,
 
 }
 
-static MemoryRegionOps ahci_mem_ops = {
+static const MemoryRegionOps ahci_mem_ops = {
     .read = ahci_mem_read,
     .write = ahci_mem_write,
     .endianness = DEVICE_LITTLE_ENDIAN,
@@ -403,7 +403,7 @@ static void ahci_idp_write(void *opaque, target_phys_addr_t addr,
     }
 }
 
-static MemoryRegionOps ahci_idp_ops = {
+static const MemoryRegionOps ahci_idp_ops = {
     .read = ahci_idp_read,
     .write = ahci_idp_write,
     .endianness = DEVICE_LITTLE_ENDIAN,
diff --git a/hw/ide/cmd646.c b/hw/ide/cmd646.c
index 743ec02406..bf8ece4708 100644
--- a/hw/ide/cmd646.c
+++ b/hw/ide/cmd646.c
@@ -65,7 +65,7 @@ static void cmd646_cmd_write(void *opaque, target_phys_addr_t addr,
     ide_cmd_write(cmd646bar->bus, addr + 2, data);
 }
 
-static MemoryRegionOps cmd646_cmd_ops = {
+static const MemoryRegionOps cmd646_cmd_ops = {
     .read = cmd646_cmd_read,
     .write = cmd646_cmd_write,
     .endianness = DEVICE_LITTLE_ENDIAN,
@@ -104,7 +104,7 @@ static void cmd646_data_write(void *opaque, target_phys_addr_t addr,
     }
 }
 
-static MemoryRegionOps cmd646_data_ops = {
+static const MemoryRegionOps cmd646_data_ops = {
     .read = cmd646_data_read,
     .write = cmd646_data_write,
     .endianness = DEVICE_LITTLE_ENDIAN,
@@ -193,7 +193,7 @@ static void bmdma_write(void *opaque, target_phys_addr_t addr,
     }
 }
 
-static MemoryRegionOps cmd646_bmdma_ops = {
+static const MemoryRegionOps cmd646_bmdma_ops = {
     .read = bmdma_read,
     .write = bmdma_write,
 };
diff --git a/hw/ide/macio.c b/hw/ide/macio.c
index abbc41b59e..a4df24406a 100644
--- a/hw/ide/macio.c
+++ b/hw/ide/macio.c
@@ -291,7 +291,7 @@ static uint32_t pmac_ide_readl (void *opaque,target_phys_addr_t addr)
     return retval;
 }
 
-static MemoryRegionOps pmac_ide_ops = {
+static const MemoryRegionOps pmac_ide_ops = {
     .old_mmio = {
         .write = {
             pmac_ide_writeb,
diff --git a/hw/ide/piix.c b/hw/ide/piix.c
index 1030fcc31c..bcaa400e2d 100644
--- a/hw/ide/piix.c
+++ b/hw/ide/piix.c
@@ -79,7 +79,7 @@ static void bmdma_write(void *opaque, target_phys_addr_t addr,
     }
 }
 
-static MemoryRegionOps piix_bmdma_ops = {
+static const MemoryRegionOps piix_bmdma_ops = {
     .read = bmdma_read,
     .write = bmdma_write,
 };
diff --git a/hw/ide/via.c b/hw/ide/via.c
index 2886bc6dfb..eec5136019 100644
--- a/hw/ide/via.c
+++ b/hw/ide/via.c
@@ -82,7 +82,7 @@ static void bmdma_write(void *opaque, target_phys_addr_t addr,
     }
 }
 
-static MemoryRegionOps via_bmdma_ops = {
+static const MemoryRegionOps via_bmdma_ops = {
     .read = bmdma_read,
     .write = bmdma_write,
 };
diff --git a/hw/mipsnet.c b/hw/mipsnet.c
index 50d92f8f54..31072463f4 100644
--- a/hw/mipsnet.c
+++ b/hw/mipsnet.c
@@ -224,7 +224,7 @@ static NetClientInfo net_mipsnet_info = {
     .cleanup = mipsnet_cleanup,
 };
 
-static MemoryRegionOps mipsnet_ioport_ops = {
+static const MemoryRegionOps mipsnet_ioport_ops = {
     .read = mipsnet_ioport_read,
     .write = mipsnet_ioport_write,
     .impl.min_access_size = 1,
diff --git a/hw/opencores_eth.c b/hw/opencores_eth.c
index 9b036cb103..4c7696935f 100644
--- a/hw/opencores_eth.c
+++ b/hw/opencores_eth.c
@@ -692,12 +692,12 @@ static void open_eth_desc_write(void *opaque,
 }
 
 
-static MemoryRegionOps open_eth_reg_ops = {
+static const MemoryRegionOps open_eth_reg_ops = {
     .read = open_eth_reg_read,
     .write = open_eth_reg_write,
 };
 
-static MemoryRegionOps open_eth_desc_ops = {
+static const MemoryRegionOps open_eth_desc_ops = {
     .read = open_eth_desc_read,
     .write = open_eth_desc_write,
 };
diff --git a/hw/spapr_pci.c b/hw/spapr_pci.c
index cfdd9ddd41..374dcf8be7 100644
--- a/hw/spapr_pci.c
+++ b/hw/spapr_pci.c
@@ -281,7 +281,7 @@ static void spapr_io_write(void *opaque, target_phys_addr_t addr,
     assert(0);
 }
 
-static MemoryRegionOps spapr_io_ops = {
+static const MemoryRegionOps spapr_io_ops = {
     .endianness = DEVICE_LITTLE_ENDIAN,
     .read = spapr_io_read,
     .write = spapr_io_write