PowerPC Compatibility

Usage of get_current() is not supported across all architectures.
The correct interface to use is the '#define current' which will
map to the appropriate function, usually current_thread_info().

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #119

include/sys/sysmacros.h

@@ -71,7 +71,7 @@
 #define DEV_BSHIFT			9 /* log2(DEV_BSIZE) */
 
 #define proc_pageout			NULL
-#define curproc				get_current()
+#define curproc				current
 #define max_ncpus			num_possible_cpus()
 #define CPU_SEQID			smp_processor_id()
 #define _NOTE(x)

include/sys/thread.h

@@ -50,7 +50,7 @@ typedef void (*thread_func_t)(void *);
 	                #func, arg, len, pp, state, pri)
 #define thread_exit()			__thread_exit()
 #define thread_join(t)			VERIFY(0)
-#define curthread			get_current()
+#define curthread			current
 
 extern kthread_t *__thread_create(caddr_t stk, size_t  stksize,
                                   thread_func_t func, const char *name,