[PATCH v2] ACPI: APEI: GHES: Mark ghes_in_nmi_spool_from_list() as maybe unused

[Rui Qi]

When CONFIG_ACPI_APEI_SEA and CONFIG_HAVE_ACPI_APEI_NMI are both
disabled, ghes_in_nmi_spool_from_list() becomes an unused static
function and triggers -Werror=unused-function in some configs, for
example riscv defconfig with APEI disabled.

Mark it as __maybe_unused to silence the warning while keeping the
code available for configurations that use SEA or APEI NMI.

Reviewed-by: Breno Leitao <leitao@xxxxxxxxxx>
Reviewed-by: Hanjun Guo <guohanjun@xxxxxxxxxx>
Reviewed-by: Shuai Xue <xueshuai@xxxxxxxxxxxxxxxxx>
Signed-off-by: Rui Qi <qirui.001@xxxxxxxxxxxxx>
---
Changes since the original submission:
- Resend with corrected Cc entries:
  linux-acpi@xxxxxxxxxxxxxxx and linux-riscv@xxxxxxxxxxxxxxxxxxx.
- Add Reviewed-by tags received in the original thread.

Original thread:
https://lore.kernel.org/all/20260316082842.84356-1-qirui.001@xxxxxxxxxxxxx/

No code changes.

 drivers/acpi/apei/ghes.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index 3236a3ce79d6..48f915ee5a0d 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -1397,8 +1397,8 @@ static int ghes_in_nmi_queue_one_entry(struct ghes *ghes,
 	return rc;
 }
 
-static int ghes_in_nmi_spool_from_list(struct list_head *rcu_list,
-				       enum fixed_addresses fixmap_idx)
+static int __maybe_unused ghes_in_nmi_spool_from_list(struct list_head *rcu_list,
+			       enum fixed_addresses fixmap_idx)
 {
 	int ret = -ENOENT;
 	struct ghes *ghes;
-- 
2.20.1