[PARISC] Untangle <asm/processor.h> header include mess

asm/processor.h on parisc wants spinlocks for cpuinfo, but
linux/spinlock_types.h needs lockdep, and lockdep wants prefetch.

This leads to a horrible circular dependancy, because <asm/processor.h>
is including something which depends on things which are not defined
until the end of the file.

Kludge around this by moving prefetch related code into <asm/prefetch.h>
and including it before <linux/spinlock_types.h>, however this is just
a temporary solution until this mess can be cleaned up.

Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>

include/asm-parisc/prefetch.h

@@ -0,0 +1,36 @@
+/*
+ * include/asm-parisc/prefetch.h
+ *
+ * PA 2.0 defines data prefetch instructions on page 6-11 of the Kane book.
+ * In addition, many implementations do hardware prefetching of both
+ * instructions and data.
+ *
+ * PA7300LC (page 14-4 of the ERS) also implements prefetching by a load
+ * to gr0 but not in a way that Linux can use.  If the load would cause an
+ * interruption (eg due to prefetching 0), it is suppressed on PA2.0
+ * processors, but not on 7300LC.
+ *
+ */
+
+#ifndef __ASM_PARISC_PREFETCH_H
+#define __ASM_PARISC_PREFETCH_H
+
+#ifndef __ASSEMBLY__
+#ifdef CONFIG_PREFETCH
+
+#define ARCH_HAS_PREFETCH
+extern inline void prefetch(const void *addr)
+{
+	__asm__("ldw 0(%0), %%r0" : : "r" (addr));
+}
+
+#define ARCH_HAS_PREFETCHW
+extern inline void prefetchw(const void *addr)
+{
+	__asm__("ldd 0(%0), %%r0" : : "r" (addr));
+}
+
+#endif /* CONFIG_PREFETCH */
+#endif /* __ASSEMBLY__ */
+
+#endif /* __ASM_PARISC_PROCESSOR_H */

include/asm-parisc/processor.h

@@ -9,6 +9,8 @@
 #define __ASM_PARISC_PROCESSOR_H
 
 #ifndef __ASSEMBLY__
+#include <asm/prefetch.h>	/* lockdep.h needs <linux/prefetch.h> */
+
 #include <linux/threads.h>
 #include <linux/spinlock_types.h>
 
@@ -328,32 +330,6 @@ extern unsigned long get_wchan(struct task_struct *p);
 #define KSTK_EIP(tsk)	((tsk)->thread.regs.iaoq[0])
 #define KSTK_ESP(tsk)	((tsk)->thread.regs.gr[30])
 
-
-/*
- * PA 2.0 defines data prefetch instructions on page 6-11 of the Kane book.
- * In addition, many implementations do hardware prefetching of both
- * instructions and data.
- *
- * PA7300LC (page 14-4 of the ERS) also implements prefetching by a load
- * to gr0 but not in a way that Linux can use.  If the load would cause an
- * interruption (eg due to prefetching 0), it is suppressed on PA2.0
- * processors, but not on 7300LC.
- */
-#ifdef  CONFIG_PREFETCH
-#define ARCH_HAS_PREFETCH
-#define ARCH_HAS_PREFETCHW
-
-extern inline void prefetch(const void *addr)
-{
-	__asm__("ldw 0(%0), %%r0" : : "r" (addr));
-}
-
-extern inline void prefetchw(const void *addr)
-{
-	__asm__("ldd 0(%0), %%r0" : : "r" (addr));
-}
-#endif
-
 #define cpu_relax()	barrier()
 
 #endif /* __ASSEMBLY__ */