runtime: unify fastrand1 and fastrand2
C and Go calling conventions are now compatible, so we
don't need two versions of this function.
LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/139080043
diff --git a/src/pkg/runtime/malloc.go b/src/pkg/runtime/malloc.go
index 5b1825a..84587a3 100644
--- a/src/pkg/runtime/malloc.go
+++ b/src/pkg/runtime/malloc.go
@@ -387,7 +387,7 @@
if rate > 0x3fffffff { // make 2*rate not overflow
rate = 0x3fffffff
}
- next := int32(fastrand2()) % (2 * int32(rate))
+ next := int32(fastrand1()) % (2 * int32(rate))
// Subtract the "remainder" of the current allocation.
// Otherwise objects that are close in size to sampling rate
// will be under-sampled, because we consistently discard this remainder.
