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platform_kernel-5.15
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ipv6: correct comments about fib6_node sernum 

correct comments in set and get fn_sernum

Signed-off-by: zhang kai <zhangkaiheb@126.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
zhang kai 2021-08-23 11:49:00 +08:00 committed by David S. Miller
parent b0cd08537d
commit 446e7f218b
2 changed files with 3 additions and 3 deletions
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4
include/net/ip6_fib.h
View File

@ -267,7 +267,7 @@ static inline bool fib6_check_expired(const struct fib6_info *f6i)
return false; return false;
} }
/* Function to safely get fn->sernum for passed in rt /* Function to safely get fn->fn_sernum for passed in rt
* and store result in passed in cookie. * and store result in passed in cookie.
* Return true if we can get cookie safely * Return true if we can get cookie safely
* Return false if not * Return false if not
@ -282,7 +282,7 @@ static inline bool fib6_get_cookie_safe(const struct fib6_info *f6i,
if (fn) { if (fn) {
*cookie = fn->fn_sernum; *cookie = fn->fn_sernum;
/* pairs with smp_wmb() in fib6_update_sernum_upto_root() */ /* pairs with smp_wmb() in __fib6_update_sernum_upto_root() */
smp_rmb(); smp_rmb();
status = true; status = true;
} }

2
net/ipv6/ip6_fib.c
View File

@ -1341,7 +1341,7 @@ static void __fib6_update_sernum_upto_root(struct fib6_info *rt,
struct fib6_node *fn = rcu_dereference_protected(rt->fib6_node, struct fib6_node *fn = rcu_dereference_protected(rt->fib6_node,
lockdep_is_held(&rt->fib6_table->tb6_lock)); lockdep_is_held(&rt->fib6_table->tb6_lock));
/* paired with smp_rmb() in rt6_get_cookie_safe() */ /* paired with smp_rmb() in fib6_get_cookie_safe() */
smp_wmb(); smp_wmb();
while (fn) { while (fn) {
fn->fn_sernum = sernum; fn->fn_sernum = sernum;