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perf tools: Remove unused functions from debugfs object 

Following debugfs object functions are not referenced
within the code:

  int debugfs_valid_entry(const char *path);
  int debugfs_umount(void);
  int debugfs_write(const char *entry, const char *value);
  int debugfs_read(const char *entry, char *buffer, size_t size);
  void debugfs_force_cleanup(void);
  int debugfs_make_path(const char *element, char *buffer, int size);

Removing them.

Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1327674868-10486-3-git-send-email-jolsa@redhat.com
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2012-01-27 15:34:21 +01:00 committed by Arnaldo Carvalho de Melo
parent e334c726ca
commit 2837609fef
2 changed files with 0 additions and 147 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

141
tools/perf/util/debugfs.c
View File

@ -15,32 +15,6 @@ static const char *debugfs_known_mountpoints[] = {
0,
};
/* use this to force a umount */
void debugfs_force_cleanup(void)
{
debugfs_find_mountpoint();
debugfs_premounted = 0;
debugfs_umount();
}
/* construct a full path to a debugfs element */
int debugfs_make_path(const char *element, char *buffer, int size)
{
int len;
if (strlen(debugfs_mountpoint) == 0) {
buffer[0] = '\0';
return -1;
}
len = strlen(debugfs_mountpoint) + strlen(element) + 1;
if (len >= size)
return len+1;
snprintf(buffer, size-1, "%s/%s", debugfs_mountpoint, element);
return 0;
}
static int debugfs_found;
/* find the path to the mounted debugfs */
@ -97,17 +71,6 @@ int debugfs_valid_mountpoint(const char *debugfs)
return 0;
}
int debugfs_valid_entry(const char *path)
{
struct stat st;
if (stat(path, &st))
return -errno;
return 0;
}
static void debugfs_set_tracing_events_path(const char *mountpoint)
{
snprintf(tracing_events_path, sizeof(tracing_events_path), "%s/%s",
@ -149,107 +112,3 @@ void debugfs_set_path(const char *mountpoint)
snprintf(debugfs_mountpoint, sizeof(debugfs_mountpoint), "%s", mountpoint);
debugfs_set_tracing_events_path(mountpoint);
}
/* umount the debugfs */
int debugfs_umount(void)
{
char umountcmd[128];
int ret;
/* if it was already mounted, leave it */
if (debugfs_premounted)
return 0;
/* make sure it's a valid mount point */
ret = debugfs_valid_mountpoint(debugfs_mountpoint);
if (ret)
return ret;
snprintf(umountcmd, sizeof(umountcmd),
"/bin/umount %s", debugfs_mountpoint);
return system(umountcmd);
}
int debugfs_write(const char *entry, const char *value)
{
char path[PATH_MAX + 1];
int ret, count;
int fd;
/* construct the path */
snprintf(path, sizeof(path), "%s/%s", debugfs_mountpoint, entry);
/* verify that it exists */
ret = debugfs_valid_entry(path);
if (ret)
return ret;
/* get how many chars we're going to write */
count = strlen(value);
/* open the debugfs entry */
fd = open(path, O_RDWR);
if (fd < 0)
return -errno;
while (count > 0) {
/* write it */
ret = write(fd, value, count);
if (ret <= 0) {
if (ret == EAGAIN)
continue;
close(fd);
return -errno;
}
count -= ret;
}
/* close it */
close(fd);
/* return success */
return 0;
}
/*
* read a debugfs entry
* returns the number of chars read or a negative errno
*/
int debugfs_read(const char *entry, char *buffer, size_t size)
{
char path[PATH_MAX + 1];
int ret;
int fd;
/* construct the path */
snprintf(path, sizeof(path), "%s/%s", debugfs_mountpoint, entry);
/* verify that it exists */
ret = debugfs_valid_entry(path);
if (ret)
return ret;
/* open the debugfs entry */
fd = open(path, O_RDONLY);
if (fd < 0)
return -errno;
do {
/* read it */
ret = read(fd, buffer, size);
if (ret == 0) {
close(fd);
return EOF;
}
} while (ret < 0 && errno == EAGAIN);
/* close it */
close(fd);
/* make *sure* there's a null character at the end */
buffer[ret] = '\0';
/* return the number of chars read */
return ret;
}

6
tools/perf/util/debugfs.h
View File

@ -3,14 +3,8 @@
const char *debugfs_find_mountpoint(void);
int debugfs_valid_mountpoint(const char *debugfs);
int debugfs_valid_entry(const char *path);
char *debugfs_mount(const char *mountpoint);
int debugfs_umount(void);
void debugfs_set_path(const char *mountpoint);
int debugfs_write(const char *entry, const char *value);
int debugfs_read(const char *entry, char *buffer, size_t size);
void debugfs_force_cleanup(void);
int debugfs_make_path(const char *element, char *buffer, int size);
extern char debugfs_mountpoint[];
extern char tracing_events_path[];