PCMachineClass::acpi_data_size was only used by the pc-i440fx-2.0
machine, which got removed. Since it is constant, replace the class
field by a definition (local to hw/i386/pc.c, since not used
elsewhere).

Signed-off-by: Philippe Mathieu-Daudé <phi...@linaro.org>
Reviewed-by: Thomas Huth <th...@redhat.com>
Reviewed-by: Zhao Liu <zhao1....@intel.com>
---
 include/hw/i386/pc.h |  4 ----
 hw/i386/pc.c         | 19 ++++++++++++-------
 hw/i386/pc_piix.c    |  7 -------
 3 files changed, 12 insertions(+), 18 deletions(-)

diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 63568eb9e9..db26368ace 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -74,9 +74,6 @@ typedef struct PCMachineState {
  *
  * Compat fields:
  *
- * @acpi_data_size: Size of the chunk of memory at the top of RAM
- *                  for the BIOS ACPI tables and other BIOS
- *                  datastructures.
  * @gigabyte_align: Make sure that guest addresses aligned at
  *                  1Gbyte boundaries get mapped to host
  *                  addresses aligned at 1Gbyte boundaries. This
@@ -100,7 +97,6 @@ struct PCMachineClass {
 
     /* ACPI compat: */
     bool has_acpi_build;
-    unsigned acpi_data_size;
     int pci_root_uid;
 
     /* SMBIOS compat: */
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index b84c8ddba0..9dca3f0354 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -264,6 +264,16 @@ GlobalProperty pc_compat_2_4[] = {
 };
 const size_t pc_compat_2_4_len = G_N_ELEMENTS(pc_compat_2_4);
 
+/*
+ * @PC_ACPI_DATA_SIZE:
+ * Size of the chunk of memory at the top of RAM for the BIOS ACPI tables
+ * and other BIOS datastructures.
+ *
+ * BIOS ACPI tables: 128K. Other BIOS datastructures: less than 4K
+ * reported to be used at the moment, 32K should be enough for a while.
+ */
+#define PC_ACPI_DATA_SIZE (0x20000 + 0x8000)
+
 GSIState *pc_gsi_create(qemu_irq **irqs, bool pci_enabled)
 {
     GSIState *s;
@@ -645,8 +655,7 @@ void xen_load_linux(PCMachineState *pcms)
     fw_cfg_add_i16(fw_cfg, FW_CFG_NB_CPUS, x86ms->boot_cpus);
     rom_set_fw(fw_cfg);
 
-    x86_load_linux(x86ms, fw_cfg, pcmc->acpi_data_size,
-                   pcmc->pvh_enabled);
+    x86_load_linux(x86ms, fw_cfg, PC_ACPI_DATA_SIZE, pcmc->pvh_enabled);
     for (i = 0; i < nb_option_roms; i++) {
         assert(!strcmp(option_rom[i].name, "linuxboot.bin") ||
                !strcmp(option_rom[i].name, "linuxboot_dma.bin") ||
@@ -980,8 +989,7 @@ void pc_memory_init(PCMachineState *pcms,
     }
 
     if (linux_boot) {
-        x86_load_linux(x86ms, fw_cfg, pcmc->acpi_data_size,
-                       pcmc->pvh_enabled);
+        x86_load_linux(x86ms, fw_cfg, PC_ACPI_DATA_SIZE, pcmc->pvh_enabled);
     }
 
     for (i = 0; i < nb_option_roms; i++) {
@@ -1737,9 +1745,6 @@ static void pc_machine_class_init(ObjectClass *oc, void 
*data)
     pcmc->has_reserved_memory = true;
     pcmc->enforce_amd_1tb_hole = true;
     pcmc->isa_bios_alias = true;
-    /* BIOS ACPI tables: 128K. Other BIOS datastructures: less than 4K reported
-     * to be used at the moment, 32K should be enough for a while.  */
-    pcmc->acpi_data_size = 0x20000 + 0x8000;
     pcmc->pvh_enabled = true;
     pcmc->kvmclock_create_always = true;
     x86mc->apic_xrupt_override = true;
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index e7f51a5f2c..e4930b7f48 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -414,13 +414,6 @@ static void pc_set_south_bridge(Object *obj, int value, 
Error **errp)
     pcms->south_bridge = PCSouthBridgeOption_lookup.array[value];
 }
 
-/* Looking for a pc_compat_2_4() function? It doesn't exist.
- * pc_compat_*() functions that run on machine-init time and
- * change global QEMU state are deprecated. Please don't create
- * one, and implement any pc-*-2.4 (and newer) compat code in
- * hw_compat_*, pc_compat_*, or * pc_*_machine_options().
- */
-
 #ifdef CONFIG_ISAPC
 static void pc_init_isa(MachineState *machine)
 {
-- 
2.41.0


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