Code review comment for ~ahasenack/ubuntu/+source/samba:groovy-samba-dep8-uring-old-kernel

How about:

    # uring is supported starting with kernel 5.1.x
    if [ ${k_major} -lt 5 ]; then
        return 1
    elif [ ${k_major} -eq 5 ] && [ ${k_minor} -ge 1 ]; then
       return 0
    elif [ ${k_major} -ge 6 ]; then
       return 0
    else
        return 1
    fi

Example test script:
#!/bin/bash

check_kernel_version() {
    local k_ver=$1
    local k_major=$(echo ${k_ver} | cut -d . -f 1)
    local k_minor=$(echo ${k_ver} | cut -d . -f 2)

    # uring is supported starting with kernel 5.1.x
    if [ ${k_major} -lt 5 ]; then
        return 1
    elif [ ${k_major} -eq 5 ] && [ ${k_minor} -ge 1 ]; then
       return 0
    elif [ ${k_major} -ge 6 ]; then
       return 0
    else
        return 1
    fi
}

for k_ver in 5.10.0 5.4.0 5.1.0 4.10.0 4.4.0 6.0.2; do
    result=0
    echo -n "Checking kernel ${k_ver}... "
    check_kernel_version ${k_ver} || result=$?
    if [ ${result} -ne 0 ]; then
        echo "FAIL"
    else
        echo "OK"
    fi
done

$ ./check-kernel.sh
Checking kernel 5.10.0... OK
Checking kernel 5.4.0... OK
Checking kernel 5.1.0... OK
Checking kernel 4.10.0... FAIL
Checking kernel 4.4.0... FAIL
Checking kernel 6.0.2... OK