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runtime: remove unused return value from lfstackUnpack

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None of the two places that call lfstackUnpack use the second argument.
This simplifies a followup CL that merges the lfstack{Pack,Unpack}
implementations.

Change-Id: I3c93f6259da99e113d94f8c8027584da79c1ac2c
Reviewed-on: https://go-review.googlesource.com/21595
Run-TryBot: Dave Cheney <dave@cheney.net>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Dave Cheney 2016-04-06 18:43:23 +10:00
parent 04945edd40
commit 0c81248bf4
4 changed files with 8 additions and 14 deletions
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4
src/runtime/lfstack.go
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@ -15,7 +15,7 @@ import (
func lfstackpush(head *uint64, node *lfnode) {
node.pushcnt++
new := lfstackPack(node, node.pushcnt)
if node1, _ := lfstackUnpack(new); node1 != node {
if node1 := lfstackUnpack(new); node1 != node {
print("runtime: lfstackpush invalid packing: node=", node, " cnt=", hex(node.pushcnt), " packed=", hex(new), " -> node=", node1, "\n")
throw("lfstackpush")
}
@ -34,7 +34,7 @@ func lfstackpop(head *uint64) unsafe.Pointer {
if old == 0 {
return nil
}
node, _ := lfstackUnpack(old)
node := lfstackUnpack(old)
next := atomic.Load64(&node.next)
if atomic.Cas64(head, old, next) {
return unsafe.Pointer(node)