diff mbox series

mtd: mtdswap: make array 'name' static const, shrinks object size

Message ID 20171128185946.25026-1-colin.king@canonical.com
State Accepted
Delegated to: Boris Brezillon
Headers show
Series mtd: mtdswap: make array 'name' static const, shrinks object size | expand

Commit Message

Colin Ian King Nov. 28, 2017, 6:59 p.m. UTC 
From: Colin Ian King <colin.king@canonical.com>

Don't populate the read-only array 'name' on the stack but instead
make it static and constify it. Makes the object code smaller by 35
bytes:

Before:
   text	   data	    bss	    dec	    hex	filename
  26304	   4444	    352	  31100	   797c	drivers/mtd/mtdswap.o

After:
   text	   data	    bss	    dec	    hex	filename
  26205	   4508	    352	  31065	   7959	drivers/mtd/mtdswap.o

(gcc version 7.2.0 x86_64)

Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
 drivers/mtd/mtdswap.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

Comments

Boris Brezillon Dec. 18, 2017, 4:21 p.m. UTC | #1 
On Tue, 28 Nov 2017 18:59:46 +0000
Colin King <colin.king@canonical.com> wrote:

> From: Colin Ian King <colin.king@canonical.com>
> 
> Don't populate the read-only array 'name' on the stack but instead
> make it static and constify it. Makes the object code smaller by 35
> bytes:
> 
> Before:
>    text	   data	    bss	    dec	    hex	filename
>   26304	   4444	    352	  31100	   797c	drivers/mtd/mtdswap.o
> 
> After:
>    text	   data	    bss	    dec	    hex	filename
>   26205	   4508	    352	  31065	   7959	drivers/mtd/mtdswap.o
> 
> (gcc version 7.2.0 x86_64)
> 
> Signed-off-by: Colin Ian King <colin.king@canonical.com>

Applied.

Thanks,

Boris

> ---
>  drivers/mtd/mtdswap.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/mtd/mtdswap.c b/drivers/mtd/mtdswap.c
> index f07492c6f4b2..7eb0e1f4f980 100644
> --- a/drivers/mtd/mtdswap.c
> +++ b/drivers/mtd/mtdswap.c
> @@ -1223,8 +1223,9 @@ static int mtdswap_show(struct seq_file *s, void *data)
>  	unsigned int max[MTDSWAP_TREE_CNT];
>  	unsigned int i, cw = 0, cwp = 0, cwecount = 0, bb_cnt, mapped, pages;
>  	uint64_t use_size;
> -	char *name[] = {"clean", "used", "low", "high", "dirty", "bitflip",
> -			"failing"};
> +	static const char * const name[] = {
> +		"clean", "used", "low", "high", "dirty", "bitflip", "failing"
> +	};
>  
>  	mutex_lock(&d->mbd_dev->lock);
>
diff mbox series

Patch

diff --git a/drivers/mtd/mtdswap.c b/drivers/mtd/mtdswap.c
index f07492c6f4b2..7eb0e1f4f980 100644
--- a/drivers/mtd/mtdswap.c
+++ b/drivers/mtd/mtdswap.c
@@ -1223,8 +1223,9 @@  static int mtdswap_show(struct seq_file *s, void *data)
 	unsigned int max[MTDSWAP_TREE_CNT];
 	unsigned int i, cw = 0, cwp = 0, cwecount = 0, bb_cnt, mapped, pages;
 	uint64_t use_size;
-	char *name[] = {"clean", "used", "low", "high", "dirty", "bitflip",
-			"failing"};
+	static const char * const name[] = {
+		"clean", "used", "low", "high", "dirty", "bitflip", "failing"
+	};
 
 	mutex_lock(&d->mbd_dev->lock);