Linus has released the 3.15-rc4 prepatch. "There's a few known things pending still (pending fix for some interesting dentry list corruption, for example - not that any remotely normal use will likely ever hit it), but on the whole things are fairly calm and nothing horribly scary. We're in the middle of the calming-down period, so that's just how I like it."
May 5, 2014
The 3.15-rc4 Kernel Prepatch is Out
Read more at LWN