[PATCH] ASoC: uniphier: make arrays mul and div static const, makes object smaller

[PATCH] ASoC: uniphier: make arrays mul and div static const, makes object smaller

[Colin King]

From: Colin Ian King <colin.king@canonical.com>

Don't populate the arrays mul and div on the stack but instead make them
static const. Makes the object code smaller by 4 bytes.

Before:
   text    data     bss     dec     hex filename
  16226    4984      64   21274    531a ./sound/soc/uniphier/aio-cpu.o

After:
   text    data     bss     dec     hex filename
  16062    5144      64   21270    5316 ./sound/soc/uniphier/aio-cpu.o

(gcc version 10.2.0)

Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
 sound/soc/uniphier/aio-cpu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/uniphier/aio-cpu.c b/sound/soc/uniphier/aio-cpu.c
index cf9814130067..4e8d5f7532ba 100644
--- a/sound/soc/uniphier/aio-cpu.c
+++ b/sound/soc/uniphier/aio-cpu.c
@@ -128,8 +128,8 @@ static const struct uniphier_aio_spec *find_spec(struct uniphier_aio *aio,
 static int find_divider(struct uniphier_aio *aio, int pll_id, unsigned int freq)
 {
 	struct uniphier_aio_pll *pll;
-	int mul[] = { 1, 1, 1, 2, };
-	int div[] = { 2, 3, 1, 3, };
+	static const int mul[] = { 1, 1, 1, 2, };
+	static const int div[] = { 2, 3, 1, 3, };
 	int i;
 
 	if (!is_valid_pll(aio->chip, pll_id))
-- 
2.32.0

Re: [PATCH] ASoC: uniphier: make arrays mul and div static const, makes object smaller

[Masami Hiramatsu]

On Wed, 18 Aug 2021 16:17:46 +0100
Colin King <colin.king@canonical.com> wrote:

> From: Colin Ian King <colin.king@canonical.com>
> 
> Don't populate the arrays mul and div on the stack but instead make them
> static const. Makes the object code smaller by 4 bytes.
> 
> Before:
>    text    data     bss     dec     hex filename
>   16226    4984      64   21274    531a ./sound/soc/uniphier/aio-cpu.o
> 
> After:
>    text    data     bss     dec     hex filename
>   16062    5144      64   21270    5316 ./sound/soc/uniphier/aio-cpu.o
> 
> (gcc version 10.2.0)

This looks good to me.

Acked-by: Masami Hiramatsu <mhiramat@kernel.org>

Thank you,

> 
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> ---
>  sound/soc/uniphier/aio-cpu.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/sound/soc/uniphier/aio-cpu.c b/sound/soc/uniphier/aio-cpu.c
> index cf9814130067..4e8d5f7532ba 100644
> --- a/sound/soc/uniphier/aio-cpu.c
> +++ b/sound/soc/uniphier/aio-cpu.c
> @@ -128,8 +128,8 @@ static const struct uniphier_aio_spec *find_spec(struct uniphier_aio *aio,
>  static int find_divider(struct uniphier_aio *aio, int pll_id, unsigned int freq)
>  {
>  	struct uniphier_aio_pll *pll;
> -	int mul[] = { 1, 1, 1, 2, };
> -	int div[] = { 2, 3, 1, 3, };
> +	static const int mul[] = { 1, 1, 1, 2, };
> +	static const int div[] = { 2, 3, 1, 3, };
>  	int i;
>  
>  	if (!is_valid_pll(aio->chip, pll_id))
> -- 
> 2.32.0
> 


-- 
Masami Hiramatsu <mhiramat@kernel.org>

Re: [PATCH] ASoC: uniphier: make arrays mul and div static const, makes object smaller

[Mark Brown]

On Wed, 18 Aug 2021 16:17:46 +0100, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
> 
> Don't populate the arrays mul and div on the stack but instead make them
> static const. Makes the object code smaller by 4 bytes.
> 
> Before:
>    text    data     bss     dec     hex filename
>   16226    4984      64   21274    531a ./sound/soc/uniphier/aio-cpu.o
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/1] ASoC: uniphier: make arrays mul and div static const, makes object smaller
      commit: 5d925d9823aaf18d55fab784bd4ef11f80fe1099

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark