perf tools: Extract perf-specific stuff from debugfs.c

Move them to util.c and simplify code a bit.

Signed-off-by: Borislav Petkov <[e-mail]>
Cc: Ingo Molnar <[e-mail]>
Cc: Steven Rostedt <[e-mail]>
Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/lib/lk/debugfs.c

···
 #include "debugfs.h"
 
 char debugfs_mountpoint[PATH_MAX + 1] = "/sys/kernel/debug";
-char tracing_events_path[PATH_MAX + 1] = "/sys/kernel/debug/tracing/events";
 
 static const char * const debugfs_known_mountpoints[] = {
 	"/sys/kernel/debug/",
···
 	return 0;
 }
 
-static void debugfs_set_tracing_events_path(const char *mountpoint)
-{
-	snprintf(tracing_events_path, sizeof(tracing_events_path), "%s/%s",
-		 mountpoint, "tracing/events");
-}
-
 /* mount the debugfs somewhere if it's not mounted */
-
 char *debugfs_mount(const char *mountpoint)
 {
 	/* see if it's already mounted */
···
 	debugfs_found = true;
 	strncpy(debugfs_mountpoint, mountpoint, sizeof(debugfs_mountpoint));
 out:
-	debugfs_set_tracing_events_path(debugfs_mountpoint);
 	return debugfs_mountpoint;
-}
-
-void debugfs_set_path(const char *mountpoint)
-{
-	snprintf(debugfs_mountpoint, sizeof(debugfs_mountpoint), "%s", mountpoint);
-	debugfs_set_tracing_events_path(mountpoint);
 }

tools/lib/lk/debugfs.h

···
 const char *debugfs_find_mountpoint(void);
 int debugfs_valid_mountpoint(const char *debugfs);
 char *debugfs_mount(const char *mountpoint);
-void debugfs_set_path(const char *mountpoint);
 
 extern char debugfs_mountpoint[];
-extern char tracing_events_path[];
 
 #endif /* __LK_DEBUGFS_H__ */

tools/perf/perf.c

···
 				fprintf(stderr, "No directory given for --debugfs-dir.\n");
 				usage(perf_usage_string);
 			}
-			debugfs_set_path((*argv)[1]);
+			perf_debugfs_set_path((*argv)[1]);
 			if (envchanged)
 				*envchanged = 1;
 			(*argv)++;
 			(*argc)--;
 		} else if (!prefixcmp(cmd, CMD_DEBUGFS_DIR)) {
-			debugfs_set_path(cmd + strlen(CMD_DEBUGFS_DIR));
+			perf_debugfs_set_path(cmd + strlen(CMD_DEBUGFS_DIR));
 			fprintf(stderr, "dir: %s\n", debugfs_mountpoint);
 			if (envchanged)
 				*envchanged = 1;
···
 	if (!cmd)
 		cmd = "perf-help";
 	/* get debugfs mount point from /proc/mounts */
-	debugfs_mount(NULL);
+	perf_debugfs_mount(NULL);
 	/*
 	 * "perf-xxxx" is the same as "perf xxxx", but we obviously:
 	 *

tools/perf/util/trace-event-info.c

···
 
 static const char *find_debugfs(void)
 {
-	const char *path = debugfs_mount(NULL);
+	const char *path = perf_debugfs_mount(NULL);
 
 	if (!path)
 		die("Your kernel not support debugfs filesystem");

tools/perf/util/util.c

···
 bool perf_host  = true;
 bool perf_guest = false;
 
+char tracing_events_path[PATH_MAX + 1] = "/sys/kernel/debug/tracing/events";
+
 void event_attr_init(struct perf_event_attr *attr)
 {
 	if (!perf_host)
···
 #endif
 	ws->ws_row = 25;
 	ws->ws_col = 80;
+}
+
+static void set_tracing_events_path(const char *mountpoint)
+{
+	snprintf(tracing_events_path, sizeof(tracing_events_path), "%s/%s",
+		 mountpoint, "tracing/events");
+}
+
+const char *perf_debugfs_mount(const char *mountpoint)
+{
+	const char *mnt;
+
+	mnt = debugfs_mount(mountpoint);
+	if (!mnt)
+		return NULL;
+
+	set_tracing_events_path(mnt);
+
+	return mnt;
+}
+
+void perf_debugfs_set_path(const char *mntpt)
+{
+	snprintf(debugfs_mountpoint, strlen(debugfs_mountpoint), "%s", mntpt);
+	set_tracing_events_path(mntpt);
 }

tools/perf/util/util.h

···
 #include <linux/magic.h>
 #include "types.h"
 #include <sys/ttydefaults.h>
+#include <lk/debugfs.h>
 
 extern const char *graph_line;
 extern const char *graph_dotted_line;
 extern char buildid_dir[];
+extern char tracing_events_path[];
+extern void perf_debugfs_set_path(const char *mountpoint);
+const char *perf_debugfs_mount(const char *mountpoint);
 
 /* On most systems <limits.h> would have given us this, but
  * not on some systems (e.g. GNU/Hurd).
···
 
 struct winsize;
 void get_term_dimensions(struct winsize *ws);
-
-#endif
+#endif /* GIT_COMPAT_UTIL_H */