reduce execs by four, and eliminate a logic bug

alsa-project/alsa-utils pull request #207 was opened from wileyhy:

Per `info uname`, uname always prints its data in the same order. Also, from [SC2015](https://www.shellcheck.net/wiki/SC2015),

"Note that A && B || C is not if-then-else. C may run when A is true."

`set -x; read -r KERNEL_VERSION < <(uname -v); smp=x; [[ "$KERNEL_VERSION" = SMP ]] && { smp=y; readonly smp; false;} || smp=n; set -`

Request URL : https://github.com/alsa-project/alsa-utils/pull/207 Patch URL : https://github.com/alsa-project/alsa-utils/pull/207.patch Repository URL: https://github.com/alsa-project/alsa-utils