ppc64: fix some -Wundef warnings

arch/ppc64/kernel/htab.c

@@ -46,6 +46,7 @@
 #include <asm/io.h>
 #include <asm/eeh.h>
 #include <asm/tlb.h>
+#include <asm/cacheflush.h>
 
 /*
  * Note:  pte   --> Linux PTE

arch/ppc64/kernel/signal32.c

@@ -29,6 +29,8 @@
 #include <asm/unistd.h>
 #include <asm/cacheflush.h>
 
+#define DEBUG_SIG 0
+
 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
 /* 
  * These are the flags in the MSR that the user is allowed to change

include/asm-ppc64/hardirq.h

@@ -82,7 +82,7 @@ typedef struct {
 
 #define irq_enter()		(preempt_count() += HARDIRQ_OFFSET)
 
-#if CONFIG_PREEMPT
+#ifdef CONFIG_PREEMPT
 # define in_atomic()	((preempt_count() & ~PREEMPT_ACTIVE) != kernel_locked())
 # define IRQ_EXIT_OFFSET (HARDIRQ_OFFSET-1)
 #else

include/asm-ppc64/semaphore.h

@@ -23,12 +23,12 @@ struct semaphore {
 	 */
 	atomic_t count;
 	wait_queue_head_t wait;
-#if WAITQUEUE_DEBUG
+#ifdef WAITQUEUE_DEBUG
 	long __magic;
 #endif
 };
 
-#if WAITQUEUE_DEBUG
+#ifdef WAITQUEUE_DEBUG
 # define __SEM_DEBUG_INIT(name) \
 		, (long)&(name).__magic
 #else
@@ -53,7 +53,7 @@ static inline void sema_init (struct semaphore *sem, int val)
 {
 	atomic_set(&sem->count, val);
 	init_waitqueue_head(&sem->wait);
-#if WAITQUEUE_DEBUG
+#ifdef WAITQUEUE_DEBUG
 	sem->__magic = (long)&sem->__magic;
 #endif
 }
@@ -74,7 +74,7 @@ extern void __up(struct semaphore * sem);
 
 static inline void down(struct semaphore * sem)
 {
-#if WAITQUEUE_DEBUG
+#ifdef WAITQUEUE_DEBUG
 	CHECK_MAGIC(sem->__magic);
 #endif
 	might_sleep();
@@ -91,7 +91,7 @@ static inline int down_interruptible(struct semaphore * sem)
 {
 	int ret = 0;
 
-#if WAITQUEUE_DEBUG
+#ifdef WAITQUEUE_DEBUG
 	CHECK_MAGIC(sem->__magic);
 #endif
 	might_sleep();
@@ -106,7 +106,7 @@ static inline int down_trylock(struct semaphore * sem)
 {
 	int ret;
 
-#if WAITQUEUE_DEBUG
+#ifdef WAITQUEUE_DEBUG
 	CHECK_MAGIC(sem->__magic);
 #endif
 
@@ -117,7 +117,7 @@ static inline int down_trylock(struct semaphore * sem)
 
 static inline void up(struct semaphore * sem)
 {
-#if WAITQUEUE_DEBUG
+#ifdef WAITQUEUE_DEBUG
 	CHECK_MAGIC(sem->__magic);
 #endif