The 5.12-rc5 kernel prepatch is out for
testing. “So if rc4 was perhaps a bit smaller than average, it looks like rc5 is
a bigger than average. We’re not breaking any records, but it
certainly isn’t tiny, and the rc’s aren’t shrinking.

I’m not overly worried yet, but let’s just say that the trend had
better not continue, or I’ll start feeling like we will need to make
this one of those releases that need an rc8.“

Source: LWN.net – Kernel prepatch 5.12-rc5