runtime: use max/min func

Change-Id: I3f0b7209621b39cee69566a5cc95e4343b4f1f20
GitHub-Last-Rev: af9dbbe69ad74e8c210254dafa260a886b690853
GitHub-Pull-Request: golang/go#63321
Reviewed-on: https://go-review.googlesource.com/c/go/+/531916
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Mauri de Souza Meneguzzo <mauri870@gmail.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Keith Randall <khr@golang.org>

1 files changed, 4 insertions, 9 deletions

diff --git a/src/runtime/mpagealloc.go b/src/runtime/mpagealloc.go
index 3e789ab85c..f87565417f 100644
--- a/src/runtime/mpagealloc.go
+++ b/src/runtime/mpagealloc.go
@@ -1038,8 +1038,8 @@ func mergeSummaries(sums []pallocSum, logMaxPagesPerSum uint) pallocSum {
 	// Merge the summaries in sums into one.
 	//
 	// We do this by keeping a running summary representing the merged
-	// summaries of sums[:i] in start, max, and end.
-	start, max, end := sums[0].unpack()
+	// summaries of sums[:i] in start, most, and end.
+	start, most, end := sums[0].unpack()
 	for i := 1; i < len(sums); i++ {
 		// Merge in sums[i].
 		si, mi, ei := sums[i].unpack()
@@ -1055,12 +1055,7 @@ func mergeSummaries(sums []pallocSum, logMaxPagesPerSum uint) pallocSum {
 		// across the boundary between the running sum and sums[i]
 		// and at the max sums[i], taking the greatest of those two
 		// and the max of the running sum.
-		if end+si > max {
-			max = end + si
-		}
-		if mi > max {
-			max = mi
-		}
+		most = max(most, end+si, mi)
 
 		// Merge in end by checking if this new summary is totally
 		// free. If it is, then we want to extend the running sum's
@@ -1073,5 +1068,5 @@ func mergeSummaries(sums []pallocSum, logMaxPagesPerSum uint) pallocSum {
 			end = ei
 		}
 	}
-	return packPallocSum(start, max, end)
+	return packPallocSum(start, most, end)
 }