diff mbox series

[net-next,v2,1/1] idpf: Don't hard code napi_struct size

Message ID 20240930162422.288995-2-jdamato@fastly.com
State Changes Requested
Headers show
Series idpf: Don't hardcode napi_struct size | expand

Commit Message

Joe Damato Sept. 30, 2024, 4:24 p.m. UTC 
The sizeof(struct napi_struct) can change. Don't hardcode the size to
400 bytes and instead use "sizeof(struct napi_struct)".

While fixing this, also move other calculations into compile time
defines.

Signed-off-by: Joe Damato <jdamato@fastly.com>
Reviewed-by: Simon Horman <horms@kernel.org>
---
 v2:
   - Added Simon Horman's Reviewed-by tag

 drivers/net/ethernet/intel/idpf/idpf_txrx.h | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

Comments

Jakub Kicinski Oct. 4, 2024, 12:32 a.m. UTC | #1 
On Mon, 30 Sep 2024 16:24:22 +0000 Joe Damato wrote:
> The sizeof(struct napi_struct) can change. Don't hardcode the size to
> 400 bytes and instead use "sizeof(struct napi_struct)".
> 
> While fixing this, also move other calculations into compile time
> defines.

Anticipating v3 with smaller diff based on Olek's suggestion so:
pw-bot: cr
diff mbox series

Patch

diff --git a/drivers/net/ethernet/intel/idpf/idpf_txrx.h b/drivers/net/ethernet/intel/idpf/idpf_txrx.h
index f0537826f840..d5e904ddcb6e 100644
--- a/drivers/net/ethernet/intel/idpf/idpf_txrx.h
+++ b/drivers/net/ethernet/intel/idpf/idpf_txrx.h
@@ -437,9 +437,13 @@  struct idpf_q_vector {
 	cpumask_var_t affinity_mask;
 	__cacheline_group_end_aligned(cold);
 };
-libeth_cacheline_set_assert(struct idpf_q_vector, 112,
-			    424 + 2 * sizeof(struct dim),
-			    8 + sizeof(cpumask_var_t));
+
+#define IDPF_Q_VECTOR_RO_SZ (112)
+#define IDPF_Q_VECTOR_RW_SZ (sizeof(struct napi_struct) + 24 + \
+			     2 * sizeof(struct dim))
+#define IDPF_Q_VECTOR_COLD_SZ (8 + sizeof(cpumask_var_t))
+libeth_cacheline_set_assert(struct idpf_q_vector, IDPF_Q_VECTOR_RO_SZ,
+			    IDPF_Q_VECTOR_RW_SZ, IDPF_Q_VECTOR_COLD_SZ);
 
 struct idpf_rx_queue_stats {
 	u64_stats_t packets;