perf callchain: Rename unwind__arch_reg_id into libunwind__arch_reg_id

Renaming unwind__arch_reg_id into libunwind__arch_reg_id, so it's clear
it's specific to libunwind.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Jean Pihet <jean.pihet@linaro.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1389098853-14466-11-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/arch/arm/util/unwind-libunwind.c

@@ -4,7 +4,7 @@
 #include "perf_regs.h"
 #include "../../util/unwind.h"
 
-int unwind__arch_reg_id(int regnum)
+int libunwind__arch_reg_id(int regnum)
 {
 	switch (regnum) {
 	case UNW_ARM_R0:

tools/perf/arch/x86/util/unwind-libunwind.c

@@ -5,7 +5,7 @@
 #include "../../util/unwind.h"
 
 #ifdef HAVE_ARCH_X86_64_SUPPORT
-int unwind__arch_reg_id(int regnum)
+int libunwind__arch_reg_id(int regnum)
 {
 	int id;
 
@@ -69,7 +69,7 @@ int unwind__arch_reg_id(int regnum)
 	return id;
 }
 #else
-int unwind__arch_reg_id(int regnum)
+int libunwind__arch_reg_id(int regnum)
 {
 	int id;
 

tools/perf/util/unwind-libunwind.c

@@ -469,7 +469,7 @@ static int access_reg(unw_addr_space_t __maybe_unused as,
 		return 0;
 	}
 
-	id = unwind__arch_reg_id(regnum);
+	id = libunwind__arch_reg_id(regnum);
 	if (id < 0)
 		return -EINVAL;
 

tools/perf/util/unwind.h

@@ -18,7 +18,7 @@ int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
 			struct machine *machine,
 			struct thread *thread,
 			struct perf_sample *data, int max_stack);
-int unwind__arch_reg_id(int regnum);
+int libunwind__arch_reg_id(int regnum);
 #else
 static inline int
 unwind__get_entries(unwind_entry_cb_t cb __maybe_unused,