This patch implements atomic_inc_return() and so on for ARM26.  Because
Hugh says that SMP is not supported in arm26, it is implemented by normal
operations between local_irq_save() and local_irq_restore() like another
atomic operations.
Signed-off-by: KaiGai, Kohei <kaigai@ak.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>