[PATCH net] net: add inline annotation to fix the build warning

From: Moon Yeounsu
Date: Tue Oct 01 2024 - 15:34:17 EST


This patch fixes two `sparse` warnings:
net/core/neighbour.c:453:9: warning: context imbalance in '__neigh_ifdown' - wrong count at exit
net/core/neighbour.c:871:9: warning: context imbalance in 'pneigh_ifdown_and_unlock' - unexpected unlock

You can check it by running:
`make C=1 net/core/neighbour.o`

Signed-off-by: Moon Yeounsu <yyyynoom@xxxxxxxxx>
---
net/core/neighbour.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 77b819cd995b..6b5ec9a44556 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -441,6 +441,7 @@ EXPORT_SYMBOL(neigh_changeaddr);

static int __neigh_ifdown(struct neigh_table *tbl, struct net_device *dev,
bool skip_perm)
+ __acquires(&tbl->lock)
{
write_lock_bh(&tbl->lock);
neigh_flush_dev(tbl, dev, skip_perm);
@@ -453,6 +454,7 @@ static int __neigh_ifdown(struct neigh_table *tbl, struct net_device *dev,
}

int neigh_carrier_down(struct neigh_table *tbl, struct net_device *dev)
+ __acquires(&tbl->lock)
{
__neigh_ifdown(tbl, dev, true);
return 0;
@@ -460,6 +462,7 @@ int neigh_carrier_down(struct neigh_table *tbl, struct net_device *dev)
EXPORT_SYMBOL(neigh_carrier_down);

int neigh_ifdown(struct neigh_table *tbl, struct net_device *dev)
+ __acquires(&tbl->lock)
{
__neigh_ifdown(tbl, dev, false);
return 0;
@@ -848,6 +851,7 @@ int pneigh_delete(struct neigh_table *tbl, struct net *net, const void *pkey,

static int pneigh_ifdown_and_unlock(struct neigh_table *tbl,
struct net_device *dev)
+ __releases(&tbl->lock)
{
struct pneigh_entry *n, **np, *freelist = NULL;
u32 h;
--
2.46.1