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Date: Thu, 26 Jan 2017 16:09:11 +0100
From: Takashi Iwai <tiwai@...e.de>
To: "Bhumika Goyal" <bhumirks@...il.com>
Cc: <alsa-devel@...a-project.org>, <julia.lawall@...6.fr>,
<perex@...ex.cz>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] sound: pci: cs46xx: constify snd_pcm_ops structures
On Thu, 26 Jan 2017 15:53:29 +0100,
Bhumika Goyal wrote:
>
> Declare snd_pcm_ops structures as const as they are either stored in the
> ops field of a snd_pcm_substream structure or passed as an argument to the
> function snd_pcm_set_ops. The function argument and the ops field
> are of type const, so snd_pcm_ops structures having this property
> can be made const too.
>
> File size before: sound/pci/cs46xx/cs46xx_lib.o
> text data bss dec hex filename
> 13669 1712 0 15381 3c15 sound/pci/cs46xx/cs46xx_lib.o
>
> File size after: sound/pci/cs46xx/cs46xx_lib.o
> text data bss dec hex filename
> 14181 1216 0 15397 3c25 sound/pci/cs46xx/cs46xx_lib.o
>
> Signed-off-by: Bhumika Goyal <bhumirks@...il.com>
I got a build error:
sound/pci/cs46xx/cs46xx_lib.c:1657:27: error: conflicting type qualifiers for ‘snd_cs46xx_playback_rear_ops’
static struct snd_pcm_ops snd_cs46xx_playback_rear_ops = {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
sound/pci/cs46xx/cs46xx_lib.c:75:33: note: previous declaration of ‘snd_cs46xx_playback_rear_ops’ was here
static const struct snd_pcm_ops snd_cs46xx_playback_rear_ops;
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
Please do a build-test at least. You seem to have forgotten to test
with CONFIG_SND_CS46XX_NEW_DSP=y.
thanks,
Takashi
> ---
> sound/pci/cs46xx/cs46xx_lib.c | 38 +++++++++++++++++++-------------------
> 1 file changed, 19 insertions(+), 19 deletions(-)
>
> diff --git a/sound/pci/cs46xx/cs46xx_lib.c b/sound/pci/cs46xx/cs46xx_lib.c
> index fde3cd4..5d012f5 100644
> --- a/sound/pci/cs46xx/cs46xx_lib.c
> +++ b/sound/pci/cs46xx/cs46xx_lib.c
> @@ -72,18 +72,18 @@
> static void amp_voyetra(struct snd_cs46xx *chip, int change);
>
> #ifdef CONFIG_SND_CS46XX_NEW_DSP
> -static struct snd_pcm_ops snd_cs46xx_playback_rear_ops;
> -static struct snd_pcm_ops snd_cs46xx_playback_indirect_rear_ops;
> -static struct snd_pcm_ops snd_cs46xx_playback_clfe_ops;
> -static struct snd_pcm_ops snd_cs46xx_playback_indirect_clfe_ops;
> -static struct snd_pcm_ops snd_cs46xx_playback_iec958_ops;
> -static struct snd_pcm_ops snd_cs46xx_playback_indirect_iec958_ops;
> +static const struct snd_pcm_ops snd_cs46xx_playback_rear_ops;
> +static const struct snd_pcm_ops snd_cs46xx_playback_indirect_rear_ops;
> +static const struct snd_pcm_ops snd_cs46xx_playback_clfe_ops;
> +static const struct snd_pcm_ops snd_cs46xx_playback_indirect_clfe_ops;
> +static const struct snd_pcm_ops snd_cs46xx_playback_iec958_ops;
> +static const struct snd_pcm_ops snd_cs46xx_playback_indirect_iec958_ops;
> #endif
>
> -static struct snd_pcm_ops snd_cs46xx_playback_ops;
> -static struct snd_pcm_ops snd_cs46xx_playback_indirect_ops;
> -static struct snd_pcm_ops snd_cs46xx_capture_ops;
> -static struct snd_pcm_ops snd_cs46xx_capture_indirect_ops;
> +static const struct snd_pcm_ops snd_cs46xx_playback_ops;
> +static const struct snd_pcm_ops snd_cs46xx_playback_indirect_ops;
> +static const struct snd_pcm_ops snd_cs46xx_capture_ops;
> +static const struct snd_pcm_ops snd_cs46xx_capture_indirect_ops;
>
> static unsigned short snd_cs46xx_codec_read(struct snd_cs46xx *chip,
> unsigned short reg,
> @@ -1665,7 +1665,7 @@ static struct snd_pcm_ops snd_cs46xx_playback_rear_ops = {
> .pointer = snd_cs46xx_playback_direct_pointer,
> };
>
> -static struct snd_pcm_ops snd_cs46xx_playback_indirect_rear_ops = {
> +static const struct snd_pcm_ops snd_cs46xx_playback_indirect_rear_ops = {
> .open = snd_cs46xx_playback_open_rear,
> .close = snd_cs46xx_playback_close,
> .ioctl = snd_pcm_lib_ioctl,
> @@ -1677,7 +1677,7 @@ static struct snd_pcm_ops snd_cs46xx_playback_indirect_rear_ops = {
> .ack = snd_cs46xx_playback_transfer,
> };
>
> -static struct snd_pcm_ops snd_cs46xx_playback_clfe_ops = {
> +static const struct snd_pcm_ops snd_cs46xx_playback_clfe_ops = {
> .open = snd_cs46xx_playback_open_clfe,
> .close = snd_cs46xx_playback_close,
> .ioctl = snd_pcm_lib_ioctl,
> @@ -1688,7 +1688,7 @@ static struct snd_pcm_ops snd_cs46xx_playback_clfe_ops = {
> .pointer = snd_cs46xx_playback_direct_pointer,
> };
>
> -static struct snd_pcm_ops snd_cs46xx_playback_indirect_clfe_ops = {
> +static const struct snd_pcm_ops snd_cs46xx_playback_indirect_clfe_ops = {
> .open = snd_cs46xx_playback_open_clfe,
> .close = snd_cs46xx_playback_close,
> .ioctl = snd_pcm_lib_ioctl,
> @@ -1700,7 +1700,7 @@ static struct snd_pcm_ops snd_cs46xx_playback_indirect_clfe_ops = {
> .ack = snd_cs46xx_playback_transfer,
> };
>
> -static struct snd_pcm_ops snd_cs46xx_playback_iec958_ops = {
> +static const struct snd_pcm_ops snd_cs46xx_playback_iec958_ops = {
> .open = snd_cs46xx_playback_open_iec958,
> .close = snd_cs46xx_playback_close_iec958,
> .ioctl = snd_pcm_lib_ioctl,
> @@ -1711,7 +1711,7 @@ static struct snd_pcm_ops snd_cs46xx_playback_iec958_ops = {
> .pointer = snd_cs46xx_playback_direct_pointer,
> };
>
> -static struct snd_pcm_ops snd_cs46xx_playback_indirect_iec958_ops = {
> +static const struct snd_pcm_ops snd_cs46xx_playback_indirect_iec958_ops = {
> .open = snd_cs46xx_playback_open_iec958,
> .close = snd_cs46xx_playback_close_iec958,
> .ioctl = snd_pcm_lib_ioctl,
> @@ -1725,7 +1725,7 @@ static struct snd_pcm_ops snd_cs46xx_playback_indirect_iec958_ops = {
>
> #endif
>
> -static struct snd_pcm_ops snd_cs46xx_playback_ops = {
> +static const struct snd_pcm_ops snd_cs46xx_playback_ops = {
> .open = snd_cs46xx_playback_open,
> .close = snd_cs46xx_playback_close,
> .ioctl = snd_pcm_lib_ioctl,
> @@ -1736,7 +1736,7 @@ static struct snd_pcm_ops snd_cs46xx_playback_ops = {
> .pointer = snd_cs46xx_playback_direct_pointer,
> };
>
> -static struct snd_pcm_ops snd_cs46xx_playback_indirect_ops = {
> +static const struct snd_pcm_ops snd_cs46xx_playback_indirect_ops = {
> .open = snd_cs46xx_playback_open,
> .close = snd_cs46xx_playback_close,
> .ioctl = snd_pcm_lib_ioctl,
> @@ -1748,7 +1748,7 @@ static struct snd_pcm_ops snd_cs46xx_playback_indirect_ops = {
> .ack = snd_cs46xx_playback_transfer,
> };
>
> -static struct snd_pcm_ops snd_cs46xx_capture_ops = {
> +static const struct snd_pcm_ops snd_cs46xx_capture_ops = {
> .open = snd_cs46xx_capture_open,
> .close = snd_cs46xx_capture_close,
> .ioctl = snd_pcm_lib_ioctl,
> @@ -1759,7 +1759,7 @@ static struct snd_pcm_ops snd_cs46xx_capture_ops = {
> .pointer = snd_cs46xx_capture_direct_pointer,
> };
>
> -static struct snd_pcm_ops snd_cs46xx_capture_indirect_ops = {
> +static const struct snd_pcm_ops snd_cs46xx_capture_indirect_ops = {
> .open = snd_cs46xx_capture_open,
> .close = snd_cs46xx_capture_close,
> .ioctl = snd_pcm_lib_ioctl,
> --
> 2.7.4
>
>
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