[PATCH] ALSA: firewire-motu: mark trace helpers as __maybe_unused

From: Arnd Bergmann
Date: Wed Apr 19 2017 - 13:53:10 EST


Two functions were introduced for the purpose of tracing but cause warnings
when tracing is disabled:

sound/firewire/motu/amdtp-motu.c:284:13: error: 'copy_message' defined but not used [-Werror=unused-function]
static void copy_message(u64 *frames, __be32 *buffer, unsigned int data_blocks,
sound/firewire/motu/amdtp-motu.c:271:13: error: 'copy_sph' defined but not used [-Werror=unused-function]
static void copy_sph(u32 *frames, __be32 *buffer, unsigned int data_blocks,

Marking them as __maybe_unused will do the right thing here.

Fixes: 17909c1b3058 ("ALSA: firewire-motu: add tracepoints for SPH in IEC 61883-1 fashion")
Fixes: c6b0b9e65f09 ("ALSA: firewire-motu: add tracepoints for messages for unique protocol")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
sound/firewire/motu/amdtp-motu.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/sound/firewire/motu/amdtp-motu.c b/sound/firewire/motu/amdtp-motu.c
index 996b5f818918..96f0091144bb 100644
--- a/sound/firewire/motu/amdtp-motu.c
+++ b/sound/firewire/motu/amdtp-motu.c
@@ -268,8 +268,9 @@ static void read_midi_messages(struct amdtp_stream *s, __be32 *buffer,
}

/* For tracepoints. */
-static void copy_sph(u32 *frames, __be32 *buffer, unsigned int data_blocks,
- unsigned int data_block_quadlets)
+static void __maybe_unused copy_sph(u32 *frames, __be32 *buffer,
+ unsigned int data_blocks,
+ unsigned int data_block_quadlets)
{
unsigned int i;

@@ -281,8 +282,9 @@ static void copy_sph(u32 *frames, __be32 *buffer, unsigned int data_blocks,
}

/* For tracepoints. */
-static void copy_message(u64 *frames, __be32 *buffer, unsigned int data_blocks,
- unsigned int data_block_quadlets)
+static void __maybe_unused copy_message(u64 *frames, __be32 *buffer,
+ unsigned int data_blocks,
+ unsigned int data_block_quadlets)
{
unsigned int i;

--
2.9.0