Skip to contentSkip to conversation

tools lib api: Unexport 'tracing_path' variable

tip:perf/core tip-bot for Arnaldo Carvalho de Melo 1 participant 1 message May 19, 2018 perf events

lore
Share & tools
lore

tip-bot for Arnaldo Carvalho de Melo

author merge bot
#0 lore raw
Commit-ID:  17c257e867be1880eaf7c1b9dac286086d75d1ec
Gitweb:     https://git.kernel.org/tip/17c257e867be1880eaf7c1b9dac286086d75d1ec
Author:     Arnaldo Carvalho de Melo <[email protected]>
AuthorDate: Wed, 16 May 2018 16:27:14 -0300
Committer:  Arnaldo Carvalho de Melo <[email protected]>
CommitDate: Wed, 16 May 2018 16:27:14 -0300

tools lib api: Unexport 'tracing_path' variable

One should use tracing_path_mount() instead, so more things get done lazily instead of at every 'perf' tool call startup.

Cc Adrian Hunter <[email protected]>
Cc David Ahern <[email protected]>
Cc Jiri Olsa <[email protected]>
Cc Namhyung Kim <[email protected]>
Cc Wang Nan <[email protected]>
Link https://lkml.kernel.org/n/[email protected] open here
Signed-off-by Arnaldo Carvalho de Melo <[email protected]>
---
 tools/lib/api/fs/tracing_path.c | 4 ++--
 tools/lib/api/fs/tracing_path.h | 1 -
 tools/perf/perf.c               | 5 +----
 tools/perf/util/probe-file.c    | 3 +--
 4 files changed, 4 insertions(+), 9 deletions(-)
tools/lib/api/fs/tracing_path.c +2 -2
index 4f8ec7d476b8..6f5fe942eff4 100644
@@ -14,7 +14,7 @@
 #include "tracing_path.h"
 
 static char tracing_mnt[PATH_MAX]  = "/sys/kernel/debug";
-char tracing_path[PATH_MAX]        = "/sys/kernel/debug/tracing";
+static char tracing_path[PATH_MAX]        = "/sys/kernel/debug/tracing";
 char tracing_events_path[PATH_MAX] = "/sys/kernel/debug/tracing/events";
 
 

@@ -75,7 +75,7 @@ char *get_tracing_file(const char *name)
 {
 	char *file;
 
-	if (asprintf(&file, "%s/%s", tracing_path, name) < 0)
+	if (asprintf(&file, "%s/%s", tracing_path_mount(), name) < 0)
 		return NULL;
 
 	return file;
tools/lib/api/fs/tracing_path.h +0 -1
index 0066f06cc381..1b65decedfc0 100644
@@ -4,7 +4,6 @@
 
 #include <linux/types.h>
 
-extern char tracing_path[];
 extern char tracing_events_path[];
 
 void tracing_path_set(const char *mountpoint);
tools/perf/perf.c +1 -4
index cd6ea55d4b0c..d5a0878de816 100644
@@ -238,7 +238,7 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
 			(*argc)--;
 		} else if (strstarts(cmd, CMD_DEBUGFS_DIR)) {
 			tracing_path_set(cmd + strlen(CMD_DEBUGFS_DIR));
-			fprintf(stderr, "dir: %s\n", tracing_path);
+			fprintf(stderr, "dir: %s\n", tracing_path_mount());
 			if (envchanged)
 				*envchanged = 1;
 		} else if (!strcmp(cmd, "--list-cmds")) {

@@ -463,9 +463,6 @@ int main(int argc, const char **argv)
 		return err;
 	set_buildid_dir(NULL);
 
-	/* get debugfs/tracefs mount point from /proc/mounts */
-	tracing_path_mount();
-
 	/*
 	 * "perf-xxxx" is the same as "perf xxxx", but we obviously:
 	 *
tools/perf/util/probe-file.c +1 -2
index 4ae1123c6794..b76088fadf3d 100644
@@ -84,8 +84,7 @@ int open_trace_file(const char *trace_file, bool readwrite)
 	char buf[PATH_MAX];
 	int ret;
 
-	ret = e_snprintf(buf, PATH_MAX, "%s/%s",
-			 tracing_path, trace_file);
+	ret = e_snprintf(buf, PATH_MAX, "%s/%s", tracing_path_mount(), trace_file);
 	if (ret >= 0) {
 		pr_debug("Opening %s write=%d\n", buf, readwrite);
 		if (readwrite && !probe_event_dry_run)