diff mbox series

[RFC,bpf-next,07/52] net, xdp: remove redundant arguments from dev_xdp_{at,de}tach_link()

Message ID 20220628194812.1453059-8-alexandr.lobakin@intel.com (mailing list archive)
State RFC
Delegated to: BPF
Headers show
Series bpf, xdp: introduce and use Generic Hints/metadata | expand

Checks

Context Check Description
bpf/vmtest-bpf-next-PR fail PR summary
bpf/vmtest-bpf-next-VM_Test-1 fail Logs for Kernel LATEST on ubuntu-latest with gcc
bpf/vmtest-bpf-next-VM_Test-2 fail Logs for Kernel LATEST on ubuntu-latest with llvm-15
bpf/vmtest-bpf-next-VM_Test-3 fail Logs for Kernel LATEST on z15 with gcc
netdev/tree_selection success Clearly marked for bpf-next, async
netdev/apply fail Patch does not apply to bpf-next

Commit Message

Alexander Lobakin June 28, 2022, 7:47 p.m. UTC 
dev_xdp_attach_link(): the sole caller always passes %NULL as
@extack and @link->dev as @dev, so they both can be omitted.
The very same story with dev_xdp_detach_link(): remove both
@dev and @extack as they both can be obtained inside the
function itself.
This decreases stack usage with no functional changes.

Signed-off-by: Alexander Lobakin <alexandr.lobakin@intel.com>
---
 net/bpf/dev.c | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)
diff mbox series

Patch

diff --git a/net/bpf/dev.c b/net/bpf/dev.c
index 68a7b2c49392..0010b20719e8 100644
--- a/net/bpf/dev.c
+++ b/net/bpf/dev.c
@@ -534,17 +534,14 @@  static int dev_xdp_attach(struct net_device *dev, struct netlink_ext_ack *extack
 	return 0;
 }
 
-static int dev_xdp_attach_link(struct net_device *dev,
-			       struct netlink_ext_ack *extack,
-			       struct bpf_xdp_link *link)
+static int dev_xdp_attach_link(struct bpf_xdp_link *link)
 {
-	return dev_xdp_attach(dev, extack, link, NULL, NULL, link->flags);
+	return dev_xdp_attach(link->dev, NULL, link, NULL, NULL, link->flags);
 }
 
-static int dev_xdp_detach_link(struct net_device *dev,
-			       struct netlink_ext_ack *extack,
-			       struct bpf_xdp_link *link)
+static int dev_xdp_detach_link(struct bpf_xdp_link *link)
 {
+	struct net_device *dev = link->dev;
 	enum bpf_xdp_mode mode;
 	bpf_op_t bpf_op;
 
@@ -570,7 +567,7 @@  static void bpf_xdp_link_release(struct bpf_link *link)
 	 * already NULL, in which case link was already auto-detached
 	 */
 	if (xdp_link->dev) {
-		WARN_ON(dev_xdp_detach_link(xdp_link->dev, NULL, xdp_link));
+		WARN_ON(dev_xdp_detach_link(xdp_link));
 		xdp_link->dev = NULL;
 	}
 
@@ -709,7 +706,7 @@  int bpf_xdp_link_attach(const union bpf_attr *attr, struct bpf_prog *prog)
 		goto unlock;
 	}
 
-	err = dev_xdp_attach_link(dev, NULL, link);
+	err = dev_xdp_attach_link(link);
 	rtnl_unlock();
 
 	if (err) {