net: Create separate gro_flush_normal function

Move multiple copies of same code snippet doing `gro_flush` and
`gro_normal_list` into separate helper function.

Signed-off-by: Samiullah Khawaja <skhawaja@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20250723013031.2911384-2-skhawaja@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: samikhawaja

include/net/gro.h

@@ -534,6 +534,12 @@ static inline void gro_normal_list(struct gro_node *gro)
 	gro->rx_count = 0;
 }
 
+static inline void gro_flush_normal(struct gro_node *gro, bool flush_old)
+{
+	gro_flush(gro, flush_old);
+	gro_normal_list(gro);
+}
+
 /* Queue one GRO_NORMAL SKB up for list processing. If batch size exceeded,
  * pass the whole batch up to the stack.
  */

kernel/bpf/cpumap.c

@@ -282,8 +282,7 @@ static void cpu_map_gro_flush(struct bpf_cpu_map_entry *rcpu, bool empty)
 	 * This is equivalent to how NAPI decides whether to perform a full
 	 * flush.
 	 */
-	gro_flush(&rcpu->gro, !empty && HZ >= 1000);
-	gro_normal_list(&rcpu->gro);
+	gro_flush_normal(&rcpu->gro, !empty && HZ >= 1000);
 }
 
 static int cpu_map_kthread_run(void *data)

net/core/dev.c

@@ -6578,8 +6578,7 @@ bool napi_complete_done(struct napi_struct *n, int work_done)
 	 * it, we need to bound somehow the time packets are kept in
 	 * the GRO layer.
 	 */
-	gro_flush(&n->gro, !!timeout);
-	gro_normal_list(&n->gro);
+	gro_flush_normal(&n->gro, !!timeout);
 
 	if (unlikely(!list_empty(&n->poll_list))) {
 		/* If n->poll_list is not empty, we need to mask irqs */
@@ -6649,8 +6648,7 @@ static void __busy_poll_stop(struct napi_struct *napi, bool skip_schedule)
 	}
 
 	/* Flush too old packets. If HZ < 1000, flush all packets */
-	gro_flush(&napi->gro, HZ >= 1000);
-	gro_normal_list(&napi->gro);
+	gro_flush_normal(&napi->gro, HZ >= 1000);
 
 	clear_bit(NAPI_STATE_SCHED, &napi->state);
 }
@@ -7515,8 +7513,7 @@ static int __napi_poll(struct napi_struct *n, bool *repoll)
 	}
 
 	/* Flush too old packets. If HZ < 1000, flush all packets */
-	gro_flush(&n->gro, HZ >= 1000);
-	gro_normal_list(&n->gro);
+	gro_flush_normal(&n->gro, HZ >= 1000);
 
 	/* Some drivers may have called napi_schedule
 	 * prior to exhausting their budget.