runtime: change tfork behaviour to unbreak openbsd/mips64

Currently, tfork on openbsd/mips64 returns the thread ID on success and a negative error number on error. In CL#447175, newosproc was changed to assume that a non-zero value is an error - return zero on success to match this expectation. Change-Id: I955efad49b149146165eba3d05fe40ba75caa098 Reviewed-on: https://go-review.googlesource.com/c/go/+/451257 Reviewed-by: Ian Lance Taylor <[email protected]> Reviewed-by: Joedian Reid <[email protected]> TryBot-Result: Gopher Robot <[email protected]> Run-TryBot: Joel Sing <[email protected]>
golang · Nov 19, 2022 · e84ce08 · e84ce08
1 parent f4f8397
commit e84ce08
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/runtime/sys_openbsd_mips64.s b/src/runtime/sys_openbsd_mips64.s
@@ -277,7 +277,7 @@ TEXT runtime·tfork(SB),NOSPLIT,$0
 
 	// In parent, return.
 	BEQ	R2, 3(PC)
-	MOVW	R2, ret+40(FP)
+	MOVW	$0, ret+40(FP)
 	RET
 
 	// Initialise m, g.