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* [PATCH bpf-next] bpf: change bq_enqueue() return type from int to void
@ 2020-08-31 15:07 Björn Töpel
2020-08-31 16:07 ` David Ahern
0 siblings, 1 reply; 3+ messages in thread
From: Björn Töpel @ 2020-08-31 15:07 UTC (permalink / raw)
To: ast, daniel, bpf
Cc: Björn Töpel, magnus.karlsson, netdev, toke, brouer
From: Björn Töpel <bjorn.topel@intel.com>
The bq_enqueue() functions for {DEV, CPU}MAP always return
zero. Changing the return type from int to void makes the code easier
to follow.
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
---
kernel/bpf/cpumap.c | 4 +---
kernel/bpf/devmap.c | 9 ++++-----
2 files changed, 5 insertions(+), 8 deletions(-)
diff --git a/kernel/bpf/cpumap.c b/kernel/bpf/cpumap.c
index 8d2a8623d2a7..e486a84b1fce 100644
--- a/kernel/bpf/cpumap.c
+++ b/kernel/bpf/cpumap.c
@@ -708,7 +708,7 @@ static int bq_flush_to_queue(struct xdp_bulk_queue *bq)
/* Runs under RCU-read-side, plus in softirq under NAPI protection.
* Thus, safe percpu variable access.
*/
-static int bq_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_frame *xdpf)
+static void bq_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_frame *xdpf)
{
struct list_head *flush_list = this_cpu_ptr(&cpu_map_flush_list);
struct xdp_bulk_queue *bq = this_cpu_ptr(rcpu->bulkq);
@@ -729,8 +729,6 @@ static int bq_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_frame *xdpf)
if (!bq->flush_node.prev)
list_add(&bq->flush_node, flush_list);
-
- return 0;
}
int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
diff --git a/kernel/bpf/devmap.c b/kernel/bpf/devmap.c
index a42052b85c35..ce29ff7ba51f 100644
--- a/kernel/bpf/devmap.c
+++ b/kernel/bpf/devmap.c
@@ -421,8 +421,8 @@ struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key)
/* Runs under RCU-read-side, plus in softirq under NAPI protection.
* Thus, safe percpu variable access.
*/
-static int bq_enqueue(struct net_device *dev, struct xdp_frame *xdpf,
- struct net_device *dev_rx)
+static void bq_enqueue(struct net_device *dev, struct xdp_frame *xdpf,
+ struct net_device *dev_rx)
{
struct list_head *flush_list = this_cpu_ptr(&dev_flush_list);
struct xdp_dev_bulk_queue *bq = this_cpu_ptr(dev->xdp_bulkq);
@@ -441,8 +441,6 @@ static int bq_enqueue(struct net_device *dev, struct xdp_frame *xdpf,
if (!bq->flush_node.prev)
list_add(&bq->flush_node, flush_list);
-
- return 0;
}
static inline int __xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
@@ -462,7 +460,8 @@ static inline int __xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
if (unlikely(!xdpf))
return -EOVERFLOW;
- return bq_enqueue(dev, xdpf, dev_rx);
+ bq_enqueue(dev, xdpf, dev_rx);
+ return 0;
}
static struct xdp_buff *dev_map_run_prog(struct net_device *dev,
--
2.25.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH bpf-next] bpf: change bq_enqueue() return type from int to void
2020-08-31 15:07 [PATCH bpf-next] bpf: change bq_enqueue() return type from int to void Björn Töpel
@ 2020-08-31 16:07 ` David Ahern
2020-09-01 6:12 ` Björn Töpel
0 siblings, 1 reply; 3+ messages in thread
From: David Ahern @ 2020-08-31 16:07 UTC (permalink / raw)
To: Björn Töpel, ast, daniel, bpf
Cc: Björn Töpel, magnus.karlsson, netdev, toke, brouer
On 8/31/20 9:07 AM, Björn Töpel wrote:
> From: Björn Töpel <bjorn.topel@intel.com>
>
> The bq_enqueue() functions for {DEV, CPU}MAP always return
> zero. Changing the return type from int to void makes the code easier
> to follow.
>
You can expand that to a few other calls in this code path - both
bq_flush_to_queue and bq_xmit_all always return 0 as well.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH bpf-next] bpf: change bq_enqueue() return type from int to void
2020-08-31 16:07 ` David Ahern
@ 2020-09-01 6:12 ` Björn Töpel
0 siblings, 0 replies; 3+ messages in thread
From: Björn Töpel @ 2020-09-01 6:12 UTC (permalink / raw)
To: David Ahern, Björn Töpel, ast, daniel, bpf
Cc: magnus.karlsson, netdev, toke, brouer
On 2020-08-31 18:07, David Ahern wrote:
> On 8/31/20 9:07 AM, Björn Töpel wrote:
>> From: Björn Töpel <bjorn.topel@intel.com>
>>
>> The bq_enqueue() functions for {DEV, CPU}MAP always return
>> zero. Changing the return type from int to void makes the code easier
>> to follow.
>>
>
> You can expand that to a few other calls in this code path - both
> bq_flush_to_queue and bq_xmit_all always return 0 as well.
>
Indeed! I'll spin a new rev!
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2020-09-01 6:13 UTC | newest]
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2020-08-31 15:07 [PATCH bpf-next] bpf: change bq_enqueue() return type from int to void Björn Töpel
2020-08-31 16:07 ` David Ahern
2020-09-01 6:12 ` Björn Töpel
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