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| author | Sasha Levin <sasha.levin@oracle.com> | 2015-08-13 18:03:16 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-08-14 04:40:57 (GMT) |
| commit | da65ad1fe399d77234a4caa50008c6b87f1fe401 (patch) | |
| tree | d000a9bf25ed974f828c7314e0eb2fd51beca21b | |
| parent | 968d7cb82aad3c6bfada79a8e26d65a1fb3f618a (diff) | |
| download | linux-da65ad1fe399d77234a4caa50008c6b87f1fe401.tar.xz | |
net: allow sleeping when modifying store_rps_map
Commit 10e4ea751 ("net: Fix race condition in store_rps_map") has moved the
manipulation of the rps_needed jump label under a spinlock. Since changing
the state of a jump label may sleep this is incorrect and causes warnings
during runtime.
Make rps_map_lock a mutex to allow sleeping under it.
Fixes: 10e4ea751 ("net: Fix race condition in store_rps_map")
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Acked-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/core/net-sysfs.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c index 39ec694..b279077 100644 --- a/net/core/net-sysfs.c +++ b/net/core/net-sysfs.c @@ -689,7 +689,7 @@ static ssize_t store_rps_map(struct netdev_rx_queue *queue, struct rps_map *old_map, *map; cpumask_var_t mask; int err, cpu, i; - static DEFINE_SPINLOCK(rps_map_lock); + static DEFINE_MUTEX(rps_map_mutex); if (!capable(CAP_NET_ADMIN)) return -EPERM; @@ -722,9 +722,9 @@ static ssize_t store_rps_map(struct netdev_rx_queue *queue, map = NULL; } - spin_lock(&rps_map_lock); + mutex_lock(&rps_map_mutex); old_map = rcu_dereference_protected(queue->rps_map, - lockdep_is_held(&rps_map_lock)); + mutex_is_locked(&rps_map_mutex)); rcu_assign_pointer(queue->rps_map, map); if (map) @@ -732,7 +732,7 @@ static ssize_t store_rps_map(struct netdev_rx_queue *queue, if (old_map) static_key_slow_dec(&rps_needed); - spin_unlock(&rps_map_lock); + mutex_unlock(&rps_map_mutex); if (old_map) kfree_rcu(old_map, rcu); |