Repository : ssh://git@open-mesh.org/batman-adv On branch : master commit 6420ac6731ccaab860b54ca0f23871e9d5c929b6 Author: Sven Eckelmann <sven(a)narfation.org&gt; Date: Wed Feb 22 17:16:41 2017 +0100 batman-adv: Fix possible side-effects in _batadv_dbg An argument of a macro should not be evaluated multiple times. Otherwise embedded operations in these arguments will be executed multiple times. Signed-off-by: Sven Eckelmann <sven(a)narfation.org&gt; 6420ac6731ccaab860b54ca0f23871e9d5c929b6 net/batman-adv/log.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/net/batman-adv/log.h b/net/batman-adv/log.h index 7a2b9f4..65ce97e 100644 --- a/net/batman-adv/log.h +++ b/net/batman-adv/log.h @@ -73,9 +73,10 @@ __printf(2, 3); /* possibly ratelimited debug output */ #define _batadv_dbg(type, bat_priv, ratelimited, fmt, arg...) \ do { \ - if (atomic_read(&(bat_priv)->log_level) & (type) && \ + struct batadv_priv *__batpriv = (bat_priv); \ + if (atomic_read(&__batpriv->log_level) & (type) && \ (!(ratelimited) || net_ratelimit())) \ - batadv_debug_log(bat_priv, fmt, ## arg); \ + batadv_debug_log(__batpriv, fmt, ## arg); \ } \ while (0) #else /* !CONFIG_BATMAN_ADV_DEBUG */