hw-breakpoints: Separate the kernel part from breakpoint headers

So that we can include this header from userspace tools, like
perf tools, to get the breakpoint types and len definitions.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Prasad <prasad@linux.vnet.ibm.com>
LKML-Reference: <1258863695-10464-4-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

include/linux/hw_breakpoint.h

@@ -16,6 +16,7 @@ enum {
 	HW_BREAKPOINT_X = 4,
 };
 
+#ifdef __KERNEL__
 #ifdef CONFIG_HAVE_HW_BREAKPOINT
 
 static inline unsigned long hw_breakpoint_addr(struct perf_event *bp)
@@ -133,5 +134,6 @@ static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp)
 }
 
 #endif /* CONFIG_HAVE_HW_BREAKPOINT */
+#endif /* __KERNEL__ */
 
 #endif /* _LINUX_HW_BREAKPOINT_H */