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runtime: change tfork behaviour to unbreak openbsd/mips64

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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 <iant@google.com>
Reviewed-by: Joedian Reid <joedian@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Joel Sing <joel@sing.id.au>
This commit is contained in:
Joel Sing 2022-11-17 12:51:56 +11:00
parent f4f8397fed
commit e84ce0802d
1 changed files with 1 additions and 1 deletions
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2
src/runtime/sys_openbsd_mips64.s
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@ -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.