misc: eeprom: at24: Tell the compiler that ACPI functions may not be used

... as is the case when !CONFIG_ACPI.

Fixes the following W=1 kernel build warning:

 drivers/misc/eeprom/at24.c:228:36: warning: ‘at24_acpi_ids’ defined but not used [-Wunused-const-variable=]

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Link: https://lore.kernel.org/r/20200701093616.GX1179328@dell
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c
index 9ff18d4..2591c21 100644 (file)
--- a/drivers/misc/eeprom/at24.c
+++ b/drivers/misc/eeprom/at24.c
@@ -225,7 +225,7 @@ static const struct of_device_id at24_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, at24_of_match);
 
-static const struct acpi_device_id at24_acpi_ids[] = {
+static const struct acpi_device_id __maybe_unused at24_acpi_ids[] = {
        { "INT3499",    (kernel_ulong_t)&at24_data_INT3499 },
        { "TPF0001",    (kernel_ulong_t)&at24_data_24c1024 },
        { /* END OF LIST */ }