lib/test_blackhole_dev.c sets a variable that is never read, causing
this following building warning:
lib/test_blackhole_dev.c:32:17: warning: variable 'ethh' set but not used [-Wunused-but-set-variable]
Remove the variable struct ethhdr *ethh, which is unused.
Fixes: 509e56b37cc3 ("blackhole_dev: add a selftest")
Signed-off-by: Breno Leitao <[email protected]>
---
lib/test_blackhole_dev.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/lib/test_blackhole_dev.c b/lib/test_blackhole_dev.c
index 4c40580a99a3..f247089d63c0 100644
--- a/lib/test_blackhole_dev.c
+++ b/lib/test_blackhole_dev.c
@@ -29,7 +29,6 @@ static int __init test_blackholedev_init(void)
{
struct ipv6hdr *ip6h;
struct sk_buff *skb;
- struct ethhdr *ethh;
struct udphdr *uh;
int data_len;
int ret;
@@ -61,7 +60,7 @@ static int __init test_blackholedev_init(void)
ip6h->saddr = in6addr_loopback;
ip6h->daddr = in6addr_loopback;
/* Ether */
- ethh = (struct ethhdr *)skb_push(skb, sizeof(struct ethhdr));
+ skb_push(skb, sizeof(struct ethhdr));
skb_set_mac_header(skb, 0);
skb->protocol = htons(ETH_P_IPV6);
--
2.39.3
On Thu, 1 Feb 2024 05:32:37 -0800 Breno Leitao wrote:
> Subject: [PATCH] blackhole_dev: Fix buil warning
Since Jiri suggested a title fix I reckon we should be a bit more
specific, still. Imagine this title ending up in a quote or a Fixes
tag, could be many things.. How about:
net: blackhole_dev: fix build warning for ethh set but not used
?
On Thu, Feb 01, 2024 at 08:55:09AM -0800, Jakub Kicinski wrote:
> On Thu, 1 Feb 2024 05:32:37 -0800 Breno Leitao wrote:
> > Subject: [PATCH] blackhole_dev: Fix buil warning
>
> Since Jiri suggested a title fix I reckon we should be a bit more
> specific, still. Imagine this title ending up in a quote or a Fixes
> tag, could be many things.. How about:
>
> net: blackhole_dev: fix build warning for ethh set but not used
Sure, let me resend it.
I suppose I should recent to `net` given it is a building warning,
right?
On Thu, 1 Feb 2024 10:46:08 -0800 Breno Leitao wrote:
> > Since Jiri suggested a title fix I reckon we should be a bit more
> > specific, still. Imagine this title ending up in a quote or a Fixes
> > tag, could be many things.. How about:
> >
> > net: blackhole_dev: fix build warning for ethh set but not used
>
> Sure, let me resend it.
>
> I suppose I should recent to `net` given it is a building warning,
> right?
Not necessarily, net-next is good enough for W=1 warnings in general.
Compiler warnings only show up if the file in question or some header
it includes was modified. The linker warnings are a bit special.
If you touch any file in any module you'll see all linker warnings.
s/buil/build/ in the subject.
Also, indicate which tree are you targetting. In this case, should be:
[patch net-next] xxx
Thu, Feb 01, 2024 at 02:32:37PM CET, [email protected] wrote:
>lib/test_blackhole_dev.c sets a variable that is never read, causing
>this following building warning:
>
> lib/test_blackhole_dev.c:32:17: warning: variable 'ethh' set but not used [-Wunused-but-set-variable]
>
>Remove the variable struct ethhdr *ethh, which is unused.
>
>Fixes: 509e56b37cc3 ("blackhole_dev: add a selftest")
>Signed-off-by: Breno Leitao <[email protected]>
The patch itself looks good. Feel free to attach
Reviewed-by: Jiri Pirko <[email protected]>
with the v2 with fixed subject. Thanks!
>---
> lib/test_blackhole_dev.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
>diff --git a/lib/test_blackhole_dev.c b/lib/test_blackhole_dev.c
>index 4c40580a99a3..f247089d63c0 100644
>--- a/lib/test_blackhole_dev.c
>+++ b/lib/test_blackhole_dev.c
>@@ -29,7 +29,6 @@ static int __init test_blackholedev_init(void)
> {
> struct ipv6hdr *ip6h;
> struct sk_buff *skb;
>- struct ethhdr *ethh;
> struct udphdr *uh;
> int data_len;
> int ret;
>@@ -61,7 +60,7 @@ static int __init test_blackholedev_init(void)
> ip6h->saddr = in6addr_loopback;
> ip6h->daddr = in6addr_loopback;
> /* Ether */
>- ethh = (struct ethhdr *)skb_push(skb, sizeof(struct ethhdr));
>+ skb_push(skb, sizeof(struct ethhdr));
> skb_set_mac_header(skb, 0);
>
> skb->protocol = htons(ETH_P_IPV6);
>--
>2.39.3
>
>