From: Rikard Falkeborn <rikard.falkeborn@gmail.com>
To: Takashi Iwai <tiwai@suse.com>, aroslav Kysela <perex@perex.cz>
Cc: alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org,
Rikard Falkeborn <rikard.falkeborn@gmail.com>
Subject: [PATCH] ALSA: aloop: Constify ops structs
Date: Sat, 21 Nov 2020 00:10:46 +0100 [thread overview]
Message-ID: <20201120231046.76758-1-rikard.falkeborn@gmail.com> (raw)
The only usage of the ops field in the loopback_cable struct is to call
its members, the field it self is never changed. Make it a pointer to
const. This allows us to constify two static loopback_ops structs to
allow the compiler to put them in read-only memory.
Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
---
sound/drivers/aloop.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/sound/drivers/aloop.c b/sound/drivers/aloop.c
index c91356326699..702f91b9c60f 100644
--- a/sound/drivers/aloop.c
+++ b/sound/drivers/aloop.c
@@ -105,7 +105,7 @@ struct loopback_cable {
unsigned int running;
unsigned int pause;
/* timer specific */
- struct loopback_ops *ops;
+ const struct loopback_ops *ops;
/* If sound timer is used */
struct {
int stream;
@@ -1021,7 +1021,7 @@ static int loopback_jiffies_timer_open(struct loopback_pcm *dpcm)
return 0;
}
-static struct loopback_ops loopback_jiffies_timer_ops = {
+static const struct loopback_ops loopback_jiffies_timer_ops = {
.open = loopback_jiffies_timer_open,
.start = loopback_jiffies_timer_start,
.stop = loopback_jiffies_timer_stop,
@@ -1172,7 +1172,7 @@ static int loopback_snd_timer_open(struct loopback_pcm *dpcm)
/* stop_sync() is not required for sound timer because it does not need to be
* restarted in loopback_prepare() on Xrun recovery
*/
-static struct loopback_ops loopback_snd_timer_ops = {
+static const struct loopback_ops loopback_snd_timer_ops = {
.open = loopback_snd_timer_open,
.start = loopback_snd_timer_start,
.stop = loopback_snd_timer_stop,
--
2.29.2
next reply other threads:[~2020-11-20 23:11 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-20 23:10 Rikard Falkeborn [this message]
2020-11-21 8:31 ` [PATCH] ALSA: aloop: Constify ops structs Takashi Iwai
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