[PATCH v2 3/5] selftests/arm64: Treat KSM merge_across_nodes as optional

[Mark Brown]

On Fri, Aug 21, 2026 at 03:15:51PM +0100, Muhammad Usama Anjum wrote:

> +static bool merge_across_nodes_available(void)
> +{
> +	const char *path = PATH_KSM "merge_across_nodes";
> +
> +	if (!access(path, R_OK | W_OK))
> +		return true;
> +	if (errno == ENOENT)
> +		return false;
> +
> +	ksft_exit_fail_msg("Unable to read and write %s: %s\n", path,
> +			   strerror(errno));
> +}

If prerequistites for the test aren't available I'd expect this to be a
skip rather than a fail.
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