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SubjectRe: [PATCH] linux/dim: fix -Wunused-const-variable warnings
Date
On Mon, 2019-07-22 at 09:08 -0400, Qian Cai wrote:
> There are a lot of compilation warnings due to tx_profile[] and
> rx_profile[] are only used in lib/dim/net_dim.c but
> include/linux/dim.h
> is included elsewhere.
>
> In file included from ./include/rdma/ib_verbs.h:64,
> from ./include/linux/mlx5/device.h:37,
> from ./include/linux/mlx5/driver.h:51,
> from
> drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c:37:
> ./include/linux/dim.h:326:1: warning: 'tx_profile' defined but not
> used
> [-Wunused-const-variable=]
> tx_profile[DIM_CQ_PERIOD_NUM_MODES][NET_DIM_PARAMS_NUM_PROFILES] = {
> ^~~~~~~~~~
> ./include/linux/dim.h:320:1: warning: 'rx_profile' defined but not
> used
> [-Wunused-const-variable=]
> rx_profile[DIM_CQ_PERIOD_NUM_MODES][NET_DIM_PARAMS_NUM_PROFILES] = {
> ^~~~~~~~~~
>
> Fix them by moving tx_profile[] and rx_profile[] into
> lib/dim/net_dim.c
> instead.
>
> Signed-off-by: Qian Cai <cai@lca.pw>
> ---
> include/linux/dim.h | 12 ------------
> lib/dim/net_dim.c | 12 ++++++++++++
> 2 files changed, 12 insertions(+), 12 deletions(-)
>
> diff --git a/include/linux/dim.h b/include/linux/dim.h
> index d3a0fbfff2bb..d5f3b10fe6e1 100644
> --- a/include/linux/dim.h
> +++ b/include/linux/dim.h
> @@ -316,18 +316,6 @@ void dim_calc_stats(struct dim_sample *start,
> struct dim_sample *end,
> {64, 32} \
> }
>
> -static const struct dim_cq_moder
> -rx_profile[DIM_CQ_PERIOD_NUM_MODES][NET_DIM_PARAMS_NUM_PROFILES] = {
> - NET_DIM_RX_EQE_PROFILES,
> - NET_DIM_RX_CQE_PROFILES,
> -};
> -
> -static const struct dim_cq_moder
> -tx_profile[DIM_CQ_PERIOD_NUM_MODES][NET_DIM_PARAMS_NUM_PROFILES] = {
> - NET_DIM_TX_EQE_PROFILES,
> - NET_DIM_TX_CQE_PROFILES,
> -};
> -
> /**
> * net_dim_get_rx_moderation - provide a CQ moderation object for
> the given RX profile
> * @cq_period_mode: CQ period mode
> diff --git a/lib/dim/net_dim.c b/lib/dim/net_dim.c
> index 5bcc902c5388..f2a8674721cf 100644
> --- a/lib/dim/net_dim.c
> +++ b/lib/dim/net_dim.c
> @@ -5,6 +5,18 @@
>
> #include <linux/dim.h>
>
> +static const struct dim_cq_moder
> +rx_profile[DIM_CQ_PERIOD_NUM_MODES][NET_DIM_PARAMS_NUM_PROFILES] = {
> + NET_DIM_RX_EQE_PROFILES,
> + NET_DIM_RX_CQE_PROFILES,
> +};
> +
> +static const struct dim_cq_moder
> +tx_profile[DIM_CQ_PERIOD_NUM_MODES][NET_DIM_PARAMS_NUM_PROFILES] = {
> + NET_DIM_TX_EQE_PROFILES,
> + NET_DIM_TX_CQE_PROFILES,
> +};
> +

Hi Qian,

it worth moving the structs and their dependencies, the whole below
code block should move to net_dim.c altogether.

/* Net DIM */

/*
* Net DIM profiles:
* There are different set of profiles for each CQ period mode.
* There are different set of profiles for RX/TX CQs.
* Each profile size must be of NET_DIM_PARAMS_NUM_PROFILES
*/
#define NET_DIM_PARAMS_NUM_PROFILES 5
#define NET_DIM_DEFAULT_RX_CQ_MODERATION_PKTS_FROM_EQE 256
#define NET_DIM_DEFAULT_TX_CQ_MODERATION_PKTS_FROM_EQE 128
#define NET_DIM_DEF_PROFILE_CQE 1
#define NET_DIM_DEF_PROFILE_EQE 1

#define NET_DIM_RX_EQE_PROFILES { \
{1, NET_DIM_DEFAULT_RX_CQ_MODERATION_PKTS_FROM_EQE}, \
{8, NET_DIM_DEFAULT_RX_CQ_MODERATION_PKTS_FROM_EQE}, \
{64, NET_DIM_DEFAULT_RX_CQ_MODERATION_PKTS_FROM_EQE}, \
{128, NET_DIM_DEFAULT_RX_CQ_MODERATION_PKTS_FROM_EQE}, \
{256, NET_DIM_DEFAULT_RX_CQ_MODERATION_PKTS_FROM_EQE}, \
}

#define NET_DIM_RX_CQE_PROFILES { \
{2, 256}, \
{8, 128}, \
{16, 64}, \
{32, 64}, \
{64, 64} \
}

#define NET_DIM_TX_EQE_PROFILES { \
{1, NET_DIM_DEFAULT_TX_CQ_MODERATION_PKTS_FROM_EQE}, \
{8, NET_DIM_DEFAULT_TX_CQ_MODERATION_PKTS_FROM_EQE}, \
{32, NET_DIM_DEFAULT_TX_CQ_MODERATION_PKTS_FROM_EQE}, \
{64, NET_DIM_DEFAULT_TX_CQ_MODERATION_PKTS_FROM_EQE}, \
{128, NET_DIM_DEFAULT_TX_CQ_MODERATION_PKTS_FROM_EQE} \
}

#define NET_DIM_TX_CQE_PROFILES { \
{5, 128}, \
{8, 64}, \
{16, 32}, \
{32, 32}, \
{64, 32} \
}

static const struct dim_cq_moder
rx_profile[DIM_CQ_PERIOD_NUM_MODES][NET_DIM_PARAMS_NUM_PROFILES] = {
NET_DIM_RX_EQE_PROFILES,
NET_DIM_RX_CQE_PROFILES,
};

static const struct dim_cq_moder
tx_profile[DIM_CQ_PERIOD_NUM_MODES][NET_DIM_PARAMS_NUM_PROFILES] = {
NET_DIM_TX_EQE_PROFILES,
NET_DIM_TX_CQE_PROFILES,
};


in case you are going to submit a V2, can you cc netdev mailing list as
well ?

> struct dim_cq_moder
> net_dim_get_rx_moderation(u8 cq_period_mode, int ix)
> {
\
 
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