2013-08-25 15:15+0800, Kevin Hao:

We plan to use the jump label in the cpu/mmu feature check on ppc.
This will need to include the jump_label.h in several very basic header
files of ppc which seems to be included by most of the other head
files implicitly or explicitly. But in the current jump_label.h,
it also include the "linux/workqueue.h" and this will cause recursive
inclusion. In order to fix this, we choose to factor out the base
part of jump_label.h to a separate header file and we can include
that file instead of jump_label.h to avoid the recursive inclusion.
No functional change.

"linux/workqueue.h" was included because of deferred keys and they are
split into "linux/jump_label_ratelimit.h" to solve the same problem in
paravirt ticket spinlock series.
(still in -next: 851cf6e7 jump_label: Split jumplabel ratelimit)