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runtime: make notetsleep_internal nowritebarrier

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When notetsleep_internal is called from notetsleepg, notetsleepg has
just given up the P, so write barriers are not allowed in
notetsleep_internal.

Change-Id: I1b214fa388b1ea05b8ce2dcfe1c0074c0a3c8870
Reviewed-on: https://go-review.googlesource.com/12647
Reviewed-by: Rick Hudson <rlh@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
This commit is contained in:
Austin Clements 2015-07-24 15:38:16 -04:00
parent cf225a1748
commit dff9108d98
1 changed files with 4 additions and 0 deletions
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4
src/runtime/lock_futex.go
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@ -144,7 +144,11 @@ func notesleep(n *note) {
} }
} }
// May run with m.p==nil if called from notetsleep, so write barriers
// are not allowed.
//
//go:nosplit //go:nosplit
//go:nowritebarrier
func notetsleep_internal(n *note, ns int64) bool { func notetsleep_internal(n *note, ns int64) bool {
gp := getg() gp := getg()