<p><code>sys/riotboot/slot.c</code> is still RIOT, so I assume <code>kernel_defines.h</code> gets included after all.</p>
<p><code>tests/riotboot</code> still compiles for samr21-xpro. I hope any possible breakage will be found by CI.</p>
<p>I added all your findings, except for <code>tests/evtimer_msg/main.c</code> which causes a conflict - here the macro does not apply anymore in master.</p>

<p style="font-size:small;-webkit-text-size-adjust:none;color:#666;">—<br />You are receiving this because you are subscribed to this thread.<br />Reply to this email directly, <a href="https://github.com/RIOT-OS/RIOT/pull/11865?email_source=notifications&email_token=ABE7WYFQLA7LNNDZHIBZUADQAYQQ7A5CNFSM4IE2ZCDKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD2RGV5Q#issuecomment-513960694">view it on GitHub</a>, or <a href="https://github.com/notifications/unsubscribe-auth/ABE7WYHUZE7SHPGOXHKHMH3QAYQQ7ANCNFSM4IE2ZCDA">mute the thread</a>.<img src="https://github.com/notifications/beacon/ABE7WYDKD26EY3J27F7WECLQAYQQ7A5CNFSM4IE2ZCDKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD2RGV5Q.gif" height="1" width="1" alt="" /></p>
<script type="application/ld+json">[
{
"@context": "http://schema.org",
"@type": "EmailMessage",
"potentialAction": {
"@type": "ViewAction",
"target": "https://github.com/RIOT-OS/RIOT/pull/11865?email_source=notifications\u0026email_token=ABE7WYFQLA7LNNDZHIBZUADQAYQQ7A5CNFSM4IE2ZCDKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD2RGV5Q#issuecomment-513960694",
"url": "https://github.com/RIOT-OS/RIOT/pull/11865?email_source=notifications\u0026email_token=ABE7WYFQLA7LNNDZHIBZUADQAYQQ7A5CNFSM4IE2ZCDKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD2RGV5Q#issuecomment-513960694",
"name": "View Pull Request"
},
"description": "View this Pull Request on GitHub",
"publisher": {
"@type": "Organization",
"name": "GitHub",
"url": "https://github.com"
}
}
]</script>