fs/proc/array.c: convert to use string_escape_str()

Instead of custom approach let's use string_escape_str() to escape a given
string (task_name in this case).

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 7 insertions, 27 deletions

diff --git a/fs/proc/array.c b/fs/proc/array.c
index bd117d065b82..a3ccf4c4ce70 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -81,6 +81,7 @@
 #include <linux/pid_namespace.h>
 #include <linux/ptrace.h>
 #include <linux/tracehook.h>
+#include <linux/string_helpers.h>
 #include <linux/user_namespace.h>
 
 #include <asm/pgtable.h>
@@ -89,39 +90,18 @@
 
 static inline void task_name(struct seq_file *m, struct task_struct *p)
 {
-        int i;
-        char *buf, *end;
-        char *name;
+        char *buf;
         char tcomm[sizeof(p->comm)];
 
         get_task_comm(tcomm, p);
 
         seq_puts(m, "Name:\t");
-        end = m->buf + m->size;
         buf = m->buf + m->count;
-        name = tcomm;
-        i = sizeof(tcomm);
-        while (i && (buf < end)) {
-                unsigned char c = *name;
-                name++;
-                i--;
-                *buf = c;
-                if (!c)
-                        break;
-                if (c == '\\') {
-                        buf++;
-                        if (buf < end)
-                                *buf++ = c;
-                        continue;
-                }
-                if (c == '\n') {
-                        *buf++ = '\\';
-                        if (buf < end)
-                                *buf++ = 'n';
-                        continue;
-                }
-                buf++;
-        }
+
+        /* Ignore error for now */
+        string_escape_str(tcomm, &buf, m->size - m->count,
+                          ESCAPE_SPACE | ESCAPE_SPECIAL, "\n\\");
+
         m->count = buf - m->buf;
         seq_putc(m, '\n');
 }