[LTP] tst_clone: Fix child detection on sparc

[linuxtestproject.agent@gmail.com]

Hi Anders,

On Tue Sep 29 10:42:53 2026 +0200, Anders Roxell wrote:
> tst_clone: Fix child detection on sparc

> @@ -20,6 +20,9 @@ pid_t tst_clone(const struct tst_clone_args *tst_args)
>  	};
>  	int flags;
>  	pid_t pid = -1;
> +#ifdef __sparc__
> +	pid_t parent_pid = tst_getpid();
> +#endif

On SPARC, clone3 already returns 0 in the child, making this call redundant
when clone3 succeeds; move it into the clone fallback path right before
syscall(__NR_clone, ...). Additionally, the SPARC kernel returns the
caller's TID (current->pid) in %o0 to the child, so use tst_gettid()
instead of tst_getpid() to support multithreaded callers.

Verdict - Needs revision

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