From mboxrd@z Thu Jan 1 00:00:00 1970 From: gustavo@embeddedor.com (Gustavo A. R. Silva) Date: Thu, 20 Jul 2017 09:17:58 -0500 Subject: [PATCH] staging: bcm2835-audio: constify snd_pcm_ops structures Message-ID: <20170720141758.GA9574@embeddedgus> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Check for snd_pcm_ops structures that are only stored in the ops field of a snd_soc_platform_driver structure or passed as the third argument to snd_pcm_set_ops. The corresponding field or parameter is declared const, so snd_pcm_ops structures that have this property can be declared as const also. This issue was detected using Coccinelle and the following semantic patch: @r disable optional_qualifier@ identifier i; position p; @@ static struct snd_pcm_ops i at p = { ... }; @ok1@ identifier r.i; struct snd_soc_platform_driver e; position p; @@ e.ops = &i at p; @ok2@ identifier r.i; expression e1, e2; position p; @@ snd_pcm_set_ops(e1, e2, &i at p) @bad@ position p != {r.p,ok1.p,ok2.p}; identifier r.i; struct snd_pcm_ops e; @@ e at i@p @depends on !bad disable optional_qualifier@ identifier r.i; @@ static +const struct snd_pcm_ops i = { ... }; Signed-off-by: Gustavo A. R. Silva --- drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c index 3637ddf..1bf34ce 100644 --- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c +++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c @@ -438,7 +438,7 @@ static int snd_bcm2835_pcm_lib_ioctl(struct snd_pcm_substream *substream, } /* operators */ -static struct snd_pcm_ops snd_bcm2835_playback_ops = { +static const struct snd_pcm_ops snd_bcm2835_playback_ops = { .open = snd_bcm2835_playback_open, .close = snd_bcm2835_playback_close, .ioctl = snd_bcm2835_pcm_lib_ioctl, @@ -450,7 +450,7 @@ static struct snd_pcm_ops snd_bcm2835_playback_ops = { .ack = snd_bcm2835_pcm_ack, }; -static struct snd_pcm_ops snd_bcm2835_playback_spdif_ops = { +static const struct snd_pcm_ops snd_bcm2835_playback_spdif_ops = { .open = snd_bcm2835_playback_spdif_open, .close = snd_bcm2835_playback_close, .ioctl = snd_bcm2835_pcm_lib_ioctl, -- 2.5.0