ACPICA: Work around bogus -Wstringop-overread warning since GCC 11

commit 6e3a475 upstream.

When ACPI_MISALIGNMENT_NOT_SUPPORTED is set, GCC can produce a bogus
-Wstringop-overread warning, see [1].

To me, it's very clear that we have a compiler bug here, thus just
disable the warning.

Fixes: a9d1343 ("LoongArch: Align ACPI structures if ARCH_STRICT_ALIGN enabled")
Link: https://lore.kernel.org/all/[email protected]/
Link: acpica/acpica@abf5b573
Link: https://gcc.gnu.org/PR122073 [1]
Co-developed-by: Saket Dumbre <[email protected]>
Signed-off-by: Saket Dumbre <[email protected]>
Signed-off-by: Xi Ruoyao <[email protected]>
Acked-by: Huacai Chen <[email protected]>
Cc: All applicable <[email protected]>
[ rjw: Subject and changelog edits ]
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Rafael J. Wysocki <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: xry111

drivers/acpi/acpica/tbprint.c

@@ -95,6 +95,11 @@ acpi_tb_print_table_header(acpi_physical_address address,
 {
 	struct acpi_table_header local_header;
 
+#pragma GCC diagnostic push
+#if defined(__GNUC__) && __GNUC__ >= 11
+#pragma GCC diagnostic ignored "-Wstringop-overread"
+#endif
+
 	if (ACPI_COMPARE_NAMESEG(header->signature, ACPI_SIG_FACS)) {
 
 		/* FACS only has signature and length fields */
@@ -135,4 +140,5 @@ acpi_tb_print_table_header(acpi_physical_address address,
 			   local_header.asl_compiler_id,
 			   local_header.asl_compiler_revision));
 	}
+#pragma GCC diagnostic pop
 }