Block

This case checks for locks around possibly blocking functions.

One semantic match and another semantic match finding locks around occurrences of GFP_KERNEL.
A note-finding semantic match that finds references to GFP_KERNEL. This refers to this semantic match.
A semantic match finding functions that indirectly may block. This includes the following semantic match. It is iterated using a script.
A semantic match finding calls to the above functions inside one set of locks.
A semantic match finding calls to the above functions inside another set of locks.
A note-finding semantic match finding calls to the above functions.