linux-kernel - [PATCH] [RESEND] comedi: ni_atmio: avoid warning for unused device

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Message-Id: <20250225145310.1110575-1-arnd@kernel.org>
Date: Tue, 25 Feb 2025 15:53:07 +0100
From: Arnd Bergmann <arnd@...nel.org>
To: Ian Abbott <abbotti@....co.uk>,
	H Hartley Sweeten <hsweeten@...ionengravers.com>
Cc: Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] [RESEND] comedi: ni_atmio: avoid warning for unused device_ids[] table

From: Arnd Bergmann <arnd@...db.de>

When the driver is built-in, it produces a W=1 warning:

drivers/comedi/drivers/ni_atmio.c:209:35: error: 'device_ids' defined but not used [-Werror=unused-const-variable=]
  209 | static const struct pnp_device_id device_ids[] = {

The actual probe() function has a different way of identifying
the hardware, so just mark this one as __maybe_unused so it
can be dropped when built-in.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
I sent this a year ago but there were no comments, resending now
without changes.
---
 drivers/comedi/drivers/ni_atmio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/comedi/drivers/ni_atmio.c b/drivers/comedi/drivers/ni_atmio.c
index 330ae1c58800..b4e759e5703f 100644
--- a/drivers/comedi/drivers/ni_atmio.c
+++ b/drivers/comedi/drivers/ni_atmio.c
@@ -215,7 +215,7 @@ static const int ni_irqpin[] = {
 
 #include "ni_mio_common.c"
 
-static const struct pnp_device_id device_ids[] = {
+static const struct pnp_device_id __maybe_unused device_ids[] = {
 	{.id = "NIC1900", .driver_data = 0},
 	{.id = "NIC2400", .driver_data = 0},
 	{.id = "NIC2500", .driver_data = 0},
-- 
2.39.5