[PATCH -mm -v2 1/2] Separate atomic_t declaration from asm/atomic.h into asm/atomic_def.h

asm/atomic.h contains both declaration and implementation of
atomic_t. So there are some implementation related files included in
asm/atomic.h. And atomic_t is a typedef. Combination of above makes it
impossible to use atomic_t in files included by atomic.h. Such as
atomic_t can not be used in linux/kernel.h on i386, because it is
included by asm/atomic.h.

>From the perspective of engineering, it is reasonable to separate
declaration from implementation. So a new file atomic_def.h is added
for every architecture to accommodate the declaration of atomic_t.

Signed-off-by: Huang Ying <ying.huang <at> intel.com>

---
 include/asm-alpha/atomic.h         |   10 +---------
 include/asm-alpha/atomic_def.h     |   13 +++++++++++++
 include/asm-arm/atomic.h           |    3 +--
 include/asm-arm/atomic_def.h       |    6 ++++++
 include/asm-avr32/atomic.h         |    2 +-
 include/asm-avr32/atomic_def.h     |    6 ++++++
 include/asm-blackfin/atomic.h      |    4 +---
 include/asm-blackfin/atomic_def.h  |    8 ++++++++
 include/asm-cris/atomic.h          |    3 +--
 include/asm-cris/atomic_def.h      |    6 ++++++
 include/asm-frv/atomic.h           |    5 +----
 include/asm-frv/atomic_def.h       |    8 ++++++++
 include/asm-h8300/atomic.h         |    3 ++-
 include/asm-h8300/atomic_def.h     |    6 ++++++
 include/asm-ia64/atomic.h          |    8 +-------
 include/asm-ia64/atomic_def.h      |   11 +++++++++++