Avoid the use of abs64 in timedata

Github-Pull: bitcoin#20141
Rebased-From: d1292f2

src/timedata.cpp

@@ -37,11 +37,6 @@ int64_t GetAdjustedTime()
     return GetTime() + GetTimeOffset();
 }
 
-static int64_t abs64(int64_t n)
-{
-    return (n >= 0 ? n : -n);
-}
-
 #define BITCOIN_TIMEDATA_MAX_SAMPLES 200
 
 void AddTimeData(const CNetAddr& ip, int64_t nOffsetSample)
@@ -81,8 +76,8 @@ void AddTimeData(const CNetAddr& ip, int64_t nOffsetSample)
         int64_t nMedian = vTimeOffsets.median();
         std::vector<int64_t> vSorted = vTimeOffsets.sorted();
         // Only let other nodes change our time by so much
-        if (abs64(nMedian) <= std::max<int64_t>(0, gArgs.GetArg("-maxtimeadjustment", DEFAULT_MAX_TIME_ADJUSTMENT)))
-        {
+        int64_t max_adjustment = std::max<int64_t>(0, gArgs.GetArg("-maxtimeadjustment", DEFAULT_MAX_TIME_ADJUSTMENT));
+        if (nMedian >= -max_adjustment && nMedian <= max_adjustment) {
             nTimeOffset = nMedian;
         }
         else
@@ -94,9 +89,10 @@ void AddTimeData(const CNetAddr& ip, int64_t nOffsetSample)
             {
                 // If nobody has a time different than ours but within 5 minutes of ours, give a warning
                 bool fMatch = false;
-                for (const int64_t nOffset : vSorted)
-                    if (nOffset != 0 && abs64(nOffset) < 5 * 60)
+                for (const int64_t nOffset : vSorted) {
+                    if (nOffset != 0 && nOffset > -5 * 60 && nOffset < 5 * 60)
                         fMatch = true;
+                }
 
                 if (!fMatch)
                 {