xt_pknock: use do_div for long division

diff --git a/extensions/pknock/xt_pknock.c b/extensions/pknock/xt_pknock.c
index db21948c5eaf6886cd8f2ddd1e0f5e8523d51e6c..8fc3358b0f9f581f1115a1afe5c60f2a211aa57c 100644 (file)
--- a/extensions/pknock/xt_pknock.c
+++ b/extensions/pknock/xt_pknock.c
@@ -335,7 +335,8 @@ is_interknock_time_exceeded(const struct peer *peer, unsigned int max_time)
 static inline bool
 has_logged_during_this_minute(const struct peer *peer)
 {
-       return peer != NULL && peer->login_sec / 60 == ktime_get_seconds() / 60;
+       unsigned long x = ktime_get_seconds(), y = peer->login_sec;
+       return peer != NULL && do_div(y, 60) == do_div(x, 60);
 }
 
 /**
@@ -709,6 +710,7 @@ has_secret(const unsigned char *secret, unsigned int secret_len, uint32_t ipsrc,
        unsigned int hexa_size;
        int ret;
        bool fret = false;
+       unsigned long x;
        unsigned int epoch_min;
 
        if (payload_len == 0)
@@ -727,7 +729,8 @@ has_secret(const unsigned char *secret, unsigned int secret_len, uint32_t ipsrc,
        hexresult = kzalloc(hexa_size, GFP_ATOMIC);
        if (hexresult == NULL)
                return false;
-       epoch_min = ktime_get_seconds() / 60;
+       x = ktime_get_seconds();
+       epoch_min = do_div(x, 60);
 
        ret = crypto_shash_setkey(crypto.tfm, secret, secret_len);
        if (ret != 0) {