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runtime/internal/atomic: fix s390x's StorepNoWB implementation 

Same as CL 170323, but for s390x instead of wasm.

Fixes #31495.

Change-Id: Ie39f649f5e33690375a8bcb1bc3b92d912ca4398
Reviewed-on: https://go-review.googlesource.com/c/go/+/172417
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Matthew Dempsky 2019-04-16 11:59:05 -07:00
parent 644543dd64
commit 13b7c04d3f
1 changed files with 4 additions and 1 deletions
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5
src/runtime/internal/atomic/atomic_s390x.go
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@ -42,11 +42,14 @@ func Store64(ptr *uint64, val uint64) {
*ptr = val *ptr = val
} }
//go:notinheap
type noWB struct{}
// NO go:noescape annotation; see atomic_pointer.go. // NO go:noescape annotation; see atomic_pointer.go.
//go:noinline //go:noinline
//go:nosplit //go:nosplit
func StorepNoWB(ptr unsafe.Pointer, val unsafe.Pointer) { func StorepNoWB(ptr unsafe.Pointer, val unsafe.Pointer) {
*(*uintptr)(ptr) = uintptr(val) *(**noWB)(ptr) = (*noWB)(val)
} }
//go:noinline //go:noinline