From: Youlin Feng <fengyoulin@live.com>
Date: Sat, 17 Jan 2026 06:20:22 +0000 (+0800)
Subject: runtime: remove the unused scanIdx from mspan
X-Git-Tag: go1.26rc3~11^2
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=2baa1d17628bb2f09757617382b1e61f1f9f0ddd;p=gostls13.git

runtime: remove the unused scanIdx from mspan

After CL 700496, mspan.scanIdx is never used, this CL just remove it.

Change-Id: I41ce9902957c0cfa6fbf26b66a2a7787b179376a
Reviewed-on: https://go-review.googlesource.com/c/go/+/737220
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Auto-Submit: Carlos Amedee <carlos@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
---

diff --git a/src/runtime/mheap.go b/src/runtime/mheap.go
index 68dfca4668..9b62ee4273 100644
--- a/src/runtime/mheap.go
+++ b/src/runtime/mheap.go
@@ -457,12 +457,6 @@ type mspan struct {
 	// mallocgc, and issue 54596).
 	freeIndexForScan uint16
 
-	// Temporary storage for the object index that caused this span to
-	// be queued for scanning.
-	//
-	// Used only with goexperiment.GreenTeaGC.
-	scanIdx uint16
-
 	// Cache of the allocBits at freeindex. allocCache is shifted
 	// such that the lowest bit corresponds to the bit freeindex.
 	// allocCache holds the complement of allocBits, thus allowing