[PATCH 6.6 37/84] ACPICA: Work around bogus -Wstringop-overread warning since GCC 11

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Xi Ruoyao <xry111@xry111.site>

commit 6e3a4754717a74e931a9f00b5f953be708e07acb 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: a9d13433fe17 ("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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/acpi/acpica/tbprint.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/acpi/acpica/tbprint.c
+++ b/drivers/acpi/acpica/tbprint.c
@@ -95,6 +95,11 @@ acpi_tb_print_table_header(acpi_physical
 {
 	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
 			   local_header.asl_compiler_id,
 			   local_header.asl_compiler_revision));
 	}
+#pragma GCC diagnostic pop
 }