mbox series

[v2,0/3] Fix clang -Wunused-but-set-variable warnings

Message ID 20210726201924.3202278-1-morbo@google.com
Headers show
Series Fix clang -Wunused-but-set-variable warnings | expand

Message

Bill Wendling July 26, 2021, 8:19 p.m. UTC 
These patches clean up warnings from clang's '-Wunused-but-set-variable' flag.

Changes for v2:
- Mark "no_warn" as "__maybe_unused" to avoid separate warning.

Bill Wendling (3):
  base: mark 'no_warn' as unused
  bnx2x: remove unused variable 'cur_data_offset'
  scsi: qla2xxx: remove unused variable 'status'

 drivers/base/module.c                             | 2 +-
 drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c | 6 ------
 drivers/scsi/qla2xxx/qla_nx.c                     | 2 --
 3 files changed, 1 insertion(+), 9 deletions(-)

Comments

Nathan Chancellor July 26, 2021, 8:36 p.m. UTC | #1 
On 7/26/2021 1:19 PM, 'Bill Wendling' via Clang Built Linux wrote:
> Fix the clang build warning:
> 
>    drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c:1862:13: error: variable 'cur_data_offset' set but not used [-Werror,-Wunused-but-set-variable]
>          dma_addr_t cur_data_offset;
> 
> Signed-off-by: Bill Wendling <morbo@google.com>

It has been unused since the function's introduction in commit 
67c431a5f2f3 ("bnx2x: Support statistics collection for VFs by the PF"), 
perhaps a leftover remnant from a previous version?

Reviewed-by: Nathan Chancellor <nathan@kernel.org>

> ---
>   drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c | 6 ------
>   1 file changed, 6 deletions(-)
> 
> diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c
> index 27943b0446c2..f255fd0b16db 100644
> --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c
> +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c
> @@ -1858,7 +1858,6 @@ void bnx2x_iov_adjust_stats_req(struct bnx2x *bp)
>   {
>   	int i;
>   	int first_queue_query_index, num_queues_req;
> -	dma_addr_t cur_data_offset;
>   	struct stats_query_entry *cur_query_entry;
>   	u8 stats_count = 0;
>   	bool is_fcoe = false;
> @@ -1879,10 +1878,6 @@ void bnx2x_iov_adjust_stats_req(struct bnx2x *bp)
>   	       BNX2X_NUM_ETH_QUEUES(bp), is_fcoe, first_queue_query_index,
>   	       first_queue_query_index + num_queues_req);
>   
> -	cur_data_offset = bp->fw_stats_data_mapping +
> -		offsetof(struct bnx2x_fw_stats_data, queue_stats) +
> -		num_queues_req * sizeof(struct per_queue_stats);
> -
>   	cur_query_entry = &bp->fw_stats_req->
>   		query[first_queue_query_index + num_queues_req];
>   
> @@ -1933,7 +1928,6 @@ void bnx2x_iov_adjust_stats_req(struct bnx2x *bp)
>   			       cur_query_entry->funcID,
>   			       j, cur_query_entry->index);
>   			cur_query_entry++;
> -			cur_data_offset += sizeof(struct per_queue_stats);
>   			stats_count++;
>   
>   			/* all stats are coalesced to the leading queue */
>
Martin K. Petersen July 29, 2021, 3:38 a.m. UTC | #2 
On Mon, 26 Jul 2021 13:19:21 -0700, Bill Wendling wrote:

> These patches clean up warnings from clang's '-Wunused-but-set-variable' flag.
> 
> Changes for v2:
> - Mark "no_warn" as "__maybe_unused" to avoid separate warning.
> 
> Bill Wendling (3):
>   base: mark 'no_warn' as unused
>   bnx2x: remove unused variable 'cur_data_offset'
>   scsi: qla2xxx: remove unused variable 'status'
> 
> [...]

Applied to 5.15/scsi-queue, thanks!

[3/3] scsi: qla2xxx: remove unused variable 'status'
      https://git.kernel.org/mkp/scsi/c/cb51bcd5c34b