From: Guoqi Chen <chenguoqi@loongson.cn>
Date: Tue, 14 Mar 2023 23:35:43 +0000 (+0800)
Subject: runtime: remove unnecessary writes to gp.sched.g on loong64
X-Git-Tag: go1.21rc1~1120
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=579109789fbb03132ae43c501add94f295d1642e;p=gostls13.git

runtime: remove unnecessary writes to gp.sched.g on loong64

Same as CL 292109, A g's sched.g is set in newproc1, After that, it never changes.
Yet lots of assembly code does "g.sched.g = g" unnecessarily. Remove it to avoid
confusion about whether it ever changes.

Change-Id: I3d3b18267a80bdd9ef5487c1d1d29de4c5a2d5cc
Reviewed-on: https://go-review.googlesource.com/c/go/+/476375
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Wayne Zuo <wdvxdr@golangcn.org>
Reviewed-by: WANG Xuerui <git@xen0n.name>
Run-TryBot: Wayne Zuo <wdvxdr@golangcn.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
---

diff --git a/src/runtime/asm_loong64.s b/src/runtime/asm_loong64.s
index d2b15144e0..b2aa5efea6 100644
--- a/src/runtime/asm_loong64.s
+++ b/src/runtime/asm_loong64.s
@@ -128,7 +128,6 @@ TEXT runtime·mcall(SB), NOSPLIT|NOFRAME, $0-8
 	MOVV	R3, (g_sched+gobuf_sp)(g)
 	MOVV	R1, (g_sched+gobuf_pc)(g)
 	MOVV	R0, (g_sched+gobuf_lr)(g)
-	MOVV	g, (g_sched+gobuf_g)(g)
 
 	// Switch to m->g0 & its stack, call fn.
 	MOVV	g, R19