diff mbox

ieee802154: fix gcc-4.9 warnings

Message ID 20170912101636.3811626-1-arnd@arndb.de (mailing list archive)
State Accepted
Headers show

Commit Message

Arnd Bergmann Sept. 12, 2017, 10:16 a.m. UTC
All older compiler versions up to gcc-4.9 produce these
harmless warnings:

drivers/net/ieee802154/ca8210.c: In function 'ca8210_skb_tx':
drivers/net/ieee802154/ca8210.c:1947:9: warning: missing braces around initializer [-Wmissing-braces]

This changes the syntax to something that works on all versions
without warnings.

Fixes: ded845a781a5 ("ieee802154: Add CA8210 IEEE 802.15.4 device driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/net/ieee802154/ca8210.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Stefan Schmidt Sept. 12, 2017, 10:24 a.m. UTC | #1
Hello.

On 09/12/2017 12:16 PM, Arnd Bergmann wrote:
> All older compiler versions up to gcc-4.9 produce these
> harmless warnings:
> 
> drivers/net/ieee802154/ca8210.c: In function 'ca8210_skb_tx':
> drivers/net/ieee802154/ca8210.c:1947:9: warning: missing braces around initializer [-Wmissing-braces]
> 
> This changes the syntax to something that works on all versions
> without warnings.
> 
> Fixes: ded845a781a5 ("ieee802154: Add CA8210 IEEE 802.15.4 device driver")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>   drivers/net/ieee802154/ca8210.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ieee802154/ca8210.c b/drivers/net/ieee802154/ca8210.c
> index 24a1eabbbc9d..e6b8ce81a6c3 100644
> --- a/drivers/net/ieee802154/ca8210.c
> +++ b/drivers/net/ieee802154/ca8210.c
> @@ -1944,7 +1944,7 @@ static int ca8210_skb_tx(
>   )
>   {
>   	int status;
> -	struct ieee802154_hdr header = { 0 };
> +	struct ieee802154_hdr header = { };
>   	struct secspec secspec;
>   	unsigned int mac_len;
>   


Acked-by: Stefan Schmidt <stefan@osg.samsung.com>

regards
Stefan Schmidt
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Marcel Holtmann Sept. 12, 2017, 2:22 p.m. UTC | #2
Hi Arnd,

> All older compiler versions up to gcc-4.9 produce these
> harmless warnings:
> 
> drivers/net/ieee802154/ca8210.c: In function 'ca8210_skb_tx':
> drivers/net/ieee802154/ca8210.c:1947:9: warning: missing braces around initializer [-Wmissing-braces]
> 
> This changes the syntax to something that works on all versions
> without warnings.
> 
> Fixes: ded845a781a5 ("ieee802154: Add CA8210 IEEE 802.15.4 device driver")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
> drivers/net/ieee802154/ca8210.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)

patch has been applied to bluetooth-next tree.

Regards

Marcel

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Joe Perches Sept. 12, 2017, 10:34 p.m. UTC | #3
On Tue, 2017-09-12 at 12:16 +0200, Arnd Bergmann wrote:
> All older compiler versions up to gcc-4.9 produce these
> harmless warnings:
> 
> drivers/net/ieee802154/ca8210.c: In function 'ca8210_skb_tx':
> drivers/net/ieee802154/ca8210.c:1947:9: warning: missing braces around initializer [-Wmissing-braces]
> 
> This changes the syntax to something that works on all versions
> without warnings.
> 
> Fixes: ded845a781a5 ("ieee802154: Add CA8210 IEEE 802.15.4 device driver")
[]
> diff --git a/drivers/net/ieee802154/ca8210.c b/drivers/net/ieee802154/ca8210.c
[]
> @@ -1944,7 +1944,7 @@ static int ca8210_skb_tx(
>  )
>  {
>  	int status;
> -	struct ieee802154_hdr header = { 0 };
> +	struct ieee802154_hdr header = { };
>  	struct secspec secspec;
>  	unsigned int mac_len;

Presumably gcc does this because the first member
of struct ieee802154_hdr is another struct.

I wonder if "struct foo bar = { 0 };" should be
discouraged by checkpatch.

Right now it's about 4:3 in favor of
	struct foo bar = {};
over
	struct foo bar = { 0 };

$ git grep -E "struct\s+\w+\s+\w+\s*=\s*\{\s*0\s*\}\s*[,;]" | wc -l
826
$ git grep -E "struct\s+\w+\s+\w+\s*=\s*\{\s*\}\s*[,;]" | wc -l
990

There are many instances on multiple lines too.
The git grep above doesn't span multiple lines.

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diff mbox

Patch

diff --git a/drivers/net/ieee802154/ca8210.c b/drivers/net/ieee802154/ca8210.c
index 24a1eabbbc9d..e6b8ce81a6c3 100644
--- a/drivers/net/ieee802154/ca8210.c
+++ b/drivers/net/ieee802154/ca8210.c
@@ -1944,7 +1944,7 @@  static int ca8210_skb_tx(
 )
 {
 	int status;
-	struct ieee802154_hdr header = { 0 };
+	struct ieee802154_hdr header = { };
 	struct secspec secspec;
 	unsigned int mac_len;