diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-01-20 14:01:31 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-01-20 14:01:31 -0300 |
commit | b4b7ff4b08e691656c9d77c758fc355833128ac0 (patch) | |
tree | 82fcb00e6b918026dc9f2d1f05ed8eee83874cc0 /net/core/utils.c | |
parent | 35acfa0fc609f2a2cd95cef4a6a9c3a5c38f1778 (diff) |
Linux-libre 4.4-gnupck-4.4-gnu
Diffstat (limited to 'net/core/utils.c')
-rw-r--r-- | net/core/utils.c | 49 |
1 files changed, 0 insertions, 49 deletions
diff --git a/net/core/utils.c b/net/core/utils.c index 3dffce953..3d17ca8b4 100644 --- a/net/core/utils.c +++ b/net/core/utils.c @@ -348,52 +348,3 @@ void inet_proto_csum_replace_by_diff(__sum16 *sum, struct sk_buff *skb, } } EXPORT_SYMBOL(inet_proto_csum_replace_by_diff); - -struct __net_random_once_work { - struct work_struct work; - struct static_key *key; -}; - -static void __net_random_once_deferred(struct work_struct *w) -{ - struct __net_random_once_work *work = - container_of(w, struct __net_random_once_work, work); - BUG_ON(!static_key_enabled(work->key)); - static_key_slow_dec(work->key); - kfree(work); -} - -static void __net_random_once_disable_jump(struct static_key *key) -{ - struct __net_random_once_work *w; - - w = kmalloc(sizeof(*w), GFP_ATOMIC); - if (!w) - return; - - INIT_WORK(&w->work, __net_random_once_deferred); - w->key = key; - schedule_work(&w->work); -} - -bool __net_get_random_once(void *buf, int nbytes, bool *done, - struct static_key *once_key) -{ - static DEFINE_SPINLOCK(lock); - unsigned long flags; - - spin_lock_irqsave(&lock, flags); - if (*done) { - spin_unlock_irqrestore(&lock, flags); - return false; - } - - get_random_bytes(buf, nbytes); - *done = true; - spin_unlock_irqrestore(&lock, flags); - - __net_random_once_disable_jump(once_key); - - return true; -} -EXPORT_SYMBOL(__net_get_random_once); |