backports: add atomic64_set()

atomic64_set() is now used by mac80211 and it is not available on some
old arm kernels.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

diff --git a/backport/compat/compat_atomic.c b/backport/compat/compat_atomic.c
index f91ae757f42f639a72266713414cf6ccb7b2fc92..5ced5a490ed066300959a718c1f0548d68f38b65 100644 (file)
--- a/backport/compat/compat_atomic.c
+++ b/backport/compat/compat_atomic.c
@@ -17,6 +17,16 @@ long long atomic64_read(const atomic64_t *v)
 }
 EXPORT_SYMBOL_GPL(atomic64_read);
 
+void atomic64_set(atomic64_t *v, long long i)
+{
+       unsigned long flags;
+
+       spin_lock_irqsave(&lock, flags);
+       v->counter = i;
+       spin_unlock_irqrestore(&lock, flags);
+}
+EXPORT_SYMBOL_GPL(atomic64_set);
+
 long long atomic64_add_return(long long a, atomic64_t *v)
 {
        unsigned long flags;