perf fs: Rename NAME_find_mountpoint() to NAME__mountpoint()

Shorten it, "finding" it is an implementation detail, what callers want
is the pathname, not to ask for it to _always_ do the lookup.

And the existing implementation already caches it, i.e. it doesn't
"finds" it on every call.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-r24wa4bvtccg7mnkessrbbdj@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/fs.c b/tools/perf/util/fs.c
index a2413e8..77bac4e4 100644
--- a/tools/perf/util/fs.c
+++ b/tools/perf/util/fs.c
@@ -88,7 +88,7 @@
 	return fs__read_mounts(fs) ? fs->path : NULL;
 }
 
-static const char *fs__find_mountpoint(int idx)
+static const char *fs__mountpoint(int idx)
 {
 	struct fs *fs = &fs__entries[idx];
 
@@ -98,10 +98,10 @@
 	return fs__get_mountpoint(fs);
 }
 
-#define FIND_MOUNTPOINT(name, idx)		\
-const char *name##_find_mountpoint(void)	\
-{						\
-	return fs__find_mountpoint(idx);	\
+#define FS__MOUNTPOINT(name, idx)	\
+const char *name##__mountpoint(void)	\
+{					\
+	return fs__mountpoint(idx);	\
 }
 
-FIND_MOUNTPOINT(sysfs, FS__SYSFS);
+FS__MOUNTPOINT(sysfs, FS__SYSFS);