reduce execs by four, and eliminate logic bug
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Per `info uname,` `uname` always prints its data in the same order. Also, "note that A && B || C is not if-then-else. C may run when A is true." https://www.shellcheck.net/wiki/SC2015 set -x; read -r KERNEL_VERSION < <(uname -v); smp=x; [[ "$KERNEL_VERSION" = *SMP* ]] && { smp=y; readonly smp; false;} || smp=n; set -
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Per
info uname,unamealways prints its data in the same order. Also, "note that A && B || C is not if-then-else. C may run when A is true." https://www.shellcheck.net/wiki/SC2015set -x; read -r KERNEL_VERSION < <(uname -v); smp=x; [[ "$KERNEL_VERSION" = SMP ]] && { smp=y; readonly smp; false;} || smp=n; set -