[DPDK/ethdev Bug 1822] net/intel/fm10k: warning with gcc-16

[DPDK/ethdev Bug 1822] net/intel/fm10k: warning with gcc-16

[bugzilla]

http://bugs.dpdk.org/show_bug.cgi?id=1822

            Bug ID: 1822
           Summary: net/intel/fm10k: warning with gcc-16
           Product: DPDK
           Version: 25.07
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: ethdev
          Assignee: dev@dpdk.org
          Reporter: stephen@networkplumber.org
  Target Milestone: ---

../drivers/net/intel/fm10k/base/fm10k_common.c: In function
‘fm10k_unbind_hw_stats_q’:
../drivers/net/intel/fm10k/base/fm10k_common.c:480:62: warning: parameter ‘idx’
set but not used [-Wunused-but-set-parameter=]
  480 | void fm10k_unbind_hw_stats_q(struct fm10k_hw_stats_q *q, u32 idx, u32
count)
      |

-- 
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[PATCH] net/fm10k: fix build with GCC 16

[Bruce Richardson]

Build error reported with GCC 16, due to a set but unused variable. Fix
the issue by removing the setting of the var and marking it as unused.

../drivers/net/intel/fm10k/base/fm10k_common.c: In function 'fm10k_unbind_hw_stats_q':
../drivers/net/intel/fm10k/base/fm10k_common.c:480:62: warning:
parameter 'idx' set but not used [-Wunused-but-set-parameter=]
  480 | void fm10k_unbind_hw_stats_q(struct fm10k_hw_stats_q *q, u32 idx, u32 count)

Bugzilla ID: 1822
Fixes: 7223d200c227 ("fm10k: add base driver")
Cc: stable@dpdk.org
Cc: stephen@networkplumber.org

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/net/intel/fm10k/base/fm10k_common.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/intel/fm10k/base/fm10k_common.c b/drivers/net/intel/fm10k/base/fm10k_common.c
index b78d4b575b..677ef87608 100644
--- a/drivers/net/intel/fm10k/base/fm10k_common.c
+++ b/drivers/net/intel/fm10k/base/fm10k_common.c
@@ -477,11 +477,11 @@ void fm10k_update_hw_stats_q(struct fm10k_hw *hw, struct fm10k_hw_stats_q *q,
  *  Function invalidates the index values for the queues so any updates that
  *  may have happened are ignored and the base for the queue stats is reset.
  **/
-void fm10k_unbind_hw_stats_q(struct fm10k_hw_stats_q *q, u32 idx, u32 count)
+void fm10k_unbind_hw_stats_q(struct fm10k_hw_stats_q *q, u32 idx __rte_unused, u32 count)
 {
 	u32 i;
 
-	for (i = 0; i < count; i++, idx++, q++) {
+	for (i = 0; i < count; i++, q++) {
 		q->rx_stats_idx = 0;
 		q->tx_stats_idx = 0;
 	}
-- 
2.48.1

Re: [PATCH] net/fm10k: fix build with GCC 16

[Medvedkin, Vladimir]

Acked-by: Vladimir Medvedkin <vladimir.medvedkin@intel.com>

On 11/4/2025 11:15 AM, Bruce Richardson wrote:
> Build error reported with GCC 16, due to a set but unused variable. Fix
> the issue by removing the setting of the var and marking it as unused.
>
> ../drivers/net/intel/fm10k/base/fm10k_common.c: In function 'fm10k_unbind_hw_stats_q':
> ../drivers/net/intel/fm10k/base/fm10k_common.c:480:62: warning:
> parameter 'idx' set but not used [-Wunused-but-set-parameter=]
>    480 | void fm10k_unbind_hw_stats_q(struct fm10k_hw_stats_q *q, u32 idx, u32 count)
>
> Bugzilla ID: 1822
> Fixes: 7223d200c227 ("fm10k: add base driver")
> Cc: stable@dpdk.org
> Cc: stephen@networkplumber.org
>
> Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
> ---
>   drivers/net/intel/fm10k/base/fm10k_common.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/intel/fm10k/base/fm10k_common.c b/drivers/net/intel/fm10k/base/fm10k_common.c
> index b78d4b575b..677ef87608 100644
> --- a/drivers/net/intel/fm10k/base/fm10k_common.c
> +++ b/drivers/net/intel/fm10k/base/fm10k_common.c
> @@ -477,11 +477,11 @@ void fm10k_update_hw_stats_q(struct fm10k_hw *hw, struct fm10k_hw_stats_q *q,
>    *  Function invalidates the index values for the queues so any updates that
>    *  may have happened are ignored and the base for the queue stats is reset.
>    **/
> -void fm10k_unbind_hw_stats_q(struct fm10k_hw_stats_q *q, u32 idx, u32 count)
> +void fm10k_unbind_hw_stats_q(struct fm10k_hw_stats_q *q, u32 idx __rte_unused, u32 count)
>   {
>   	u32 i;
>   
> -	for (i = 0; i < count; i++, idx++, q++) {
> +	for (i = 0; i < count; i++, q++) {
>   		q->rx_stats_idx = 0;
>   		q->tx_stats_idx = 0;
>   	}

-- 
Regards,
Vladimir