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hw/acpi: changes towards enabling -Wshadow=local

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Code changes in acpi that addresses all compiler complaints coming from enabling
-Wshadow flags. Enabling -Wshadow catches cases of local variables shadowing
other local variables or parameters. These makes the code confusing and/or adds
bugs that are difficult to catch.  See also

    Subject: Help wanted for enabling -Wshadow=local
    Message-Id: <87r0mqlf9x.fsf@pond.sub.org>
    https://lore.kernel.org/qemu-devel/87r0mqlf9x.fsf@pond.sub.org

The code is tested to build with and without the flag turned on.

CC: Markus Armbruster <armbru@redhat.com>
CC: Philippe Mathieu-Daude <philmd@linaro.org>
CC: mst@redhat.com
CC: imammedo@redhat.com
Signed-off-by: Ani Sinha <anisinha@redhat.com>
Message-ID: <20230922124203.127110-1-anisinha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
[Commit message tweaked]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
This commit is contained in:
Ani Sinha 2023-09-22 18:12:02 +05:30 • committed by Markus Armbruster
parent d8573092a4
commit 7b393b7142
3 changed files with 44 additions and 42 deletions
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24
hw/i386/acpi-build.c
View file

@ -1585,12 +1585,12 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
aml_append(dev, aml_name_decl("_UID", aml_int(bus_num)));
aml_append(dev, aml_name_decl("_BBN", aml_int(bus_num)));
if (pci_bus_is_cxl(bus)) {
struct Aml *pkg = aml_package(2);
struct Aml *aml_pkg = aml_package(2);
aml_append(dev, aml_name_decl("_HID", aml_string("ACPI0016")));
aml_append(pkg, aml_eisaid("PNP0A08"));
aml_append(pkg, aml_eisaid("PNP0A03"));
aml_append(dev, aml_name_decl("_CID", pkg));
aml_append(aml_pkg, aml_eisaid("PNP0A08"));
aml_append(aml_pkg, aml_eisaid("PNP0A03"));
aml_append(dev, aml_name_decl("_CID", aml_pkg));
build_cxl_osc_method(dev);
} else if (pci_bus_is_express(bus)) {
aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0A08")));
@ -1783,14 +1783,14 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
Object *pci_host = acpi_get_i386_pci_host();
if (pci_host) {
PCIBus *bus = PCI_HOST_BRIDGE(pci_host)->bus;
Aml *scope = aml_scope("PCI0");
PCIBus *pbus = PCI_HOST_BRIDGE(pci_host)->bus;
Aml *ascope = aml_scope("PCI0");
/* Scan all PCI buses. Generate tables to support hotplug. */
build_append_pci_bus_devices(scope, bus);
if (object_property_find(OBJECT(bus), ACPI_PCIHP_PROP_BSEL)) {
build_append_pcihp_slots(scope, bus);
build_append_pci_bus_devices(ascope, pbus);
if (object_property_find(OBJECT(pbus), ACPI_PCIHP_PROP_BSEL)) {
build_append_pcihp_slots(ascope, pbus);
}
aml_append(sb_scope, scope);
aml_append(sb_scope, ascope);
}
}
@ -1842,10 +1842,10 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
bool has_pcnt;
Object *pci_host = acpi_get_i386_pci_host();
PCIBus *bus = PCI_HOST_BRIDGE(pci_host)->bus;
PCIBus *b = PCI_HOST_BRIDGE(pci_host)->bus;
scope = aml_scope("\\_SB.PCI0");
has_pcnt = build_append_notfication_callback(scope, bus);
has_pcnt = build_append_notfication_callback(scope, b);
if (has_pcnt) {
aml_append(dsdt, scope);
}