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net/sysctl: Rename kvfree_rcu() to kvfree_rcu_mightsleep()

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The kfree_rcu() and kvfree_rcu() macros' single-argument forms are
deprecated.  Therefore switch to the new kfree_rcu_mightsleep() and
kvfree_rcu_mightsleep() variants. The goal is to avoid accidental use
of the single-argument forms, which can introduce functionality bugs in
atomic contexts and latency bugs in non-atomic contexts.

Acked-by: Jakub Kicinski <kuba@kernel.org>
Cc: Eric Dumazet <edumazet@google.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
This commit is contained in:
Uladzislau Rezki (Sony) 2023-02-01 16:08:12 +01:00 committed by Joel Fernandes (Google)
parent c779b97281
commit aef3b8b8dd
1 changed files with 2 additions and 2 deletions
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4
net/core/sysctl_net_core.c
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@ -177,7 +177,7 @@ static int rps_sock_flow_sysctl(struct ctl_table *table, int write,
if (orig_sock_table) {
static_branch_dec(&rps_needed);
static_branch_dec(&rfs_needed);
kvfree_rcu(orig_sock_table);
kvfree_rcu_mightsleep(orig_sock_table);
}
}
}
@ -215,7 +215,7 @@ static int flow_limit_cpu_sysctl(struct ctl_table *table, int write,
lockdep_is_held(&flow_limit_update_mutex));
if (cur && !cpumask_test_cpu(i, mask)) {
RCU_INIT_POINTER(sd->flow_limit, NULL);
kfree_rcu(cur);
kfree_rcu_mightsleep(cur);
} else if (!cur && cpumask_test_cpu(i, mask)) {
cur = kzalloc_node(len, GFP_KERNEL,
cpu_to_node(i));