Commit 6e3a4754 authored Oct 21, 2025 by Xi Ruoyao Committed by Rafael J. Wysocki Oct 21, 2025

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

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: a9d13433 ("LoongArch: Align ACPI structures if ARCH_STRICT_ALIGN enabled")
Link: https://lore.kernel.org/all/899f2dec-e8b9-44f4-ab8d-001e160a2aed@roeck-us.net/
Link: https://github.com/acpica/acpica/commit/abf5b573
Link: https://gcc.gnu.org/PR122073

 [1]
Co-developed-by: Saket Dumbre <saket.dumbre@intel.com>
Signed-off-by: Saket Dumbre <saket.dumbre@intel.com>
Signed-off-by: Xi Ruoyao <xry111@xry111.site>
Acked-by: Huacai Chen <chenhuacai@loongson.cn>
Cc: All applicable <stable@vger.kernel.org>
[ rjw: Subject and changelog edits ]
Link: https://patch.msgid.link/20251021092825.822007-1-xry111@xry111.site


Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

parent 211ddde0

drivers/acpi/acpica/tbprint.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -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 */
		@@ -143,4 +148,5 @@ acpi_tb_print_table_header(acpi_physical_address address,
		local_header.asl_compiler_id,
		local_header.asl_compiler_revision));
		}
		#pragma GCC diagnostic pop
		}