4 files changed, 4 insertions, 22 deletions

diff --git a/fs/exec.c b/fs/exec.c
index b60ccf969a8b..9e81c630dfa7 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1046,7 +1046,7 @@ EXPORT_SYMBOL_GPL(get_task_comm);
  * so that a new one can be started
  */
 
-void set_task_comm(struct task_struct *tsk, char *buf)
+void set_task_comm(struct task_struct *tsk, const char *buf)
 {
         task_lock(tsk);
         trace_task_rename(tsk, buf);
@@ -1055,21 +1055,6 @@ void set_task_comm(struct task_struct *tsk, char *buf)
         perf_event_comm(tsk);
 }
 
-static void filename_to_taskname(char *tcomm, const char *fn, unsigned int len)
-{
-        int i, ch;
-
-        /* Copies the binary name from after last slash */
-        for (i = 0; (ch = *(fn++)) != '\0';) {
-                if (ch == '/')
-                        i = 0; /* overwrite what we wrote */
-                else
-                        if (i < len - 1)
-                                tcomm[i++] = ch;
-        }
-        tcomm[i] = '\0';
-}
-
 int flush_old_exec(struct linux_binprm * bprm)
 {
         int retval;
@@ -1083,8 +1068,6 @@ int flush_old_exec(struct linux_binprm * bprm)
                 goto out;
 
         set_mm_exe_file(bprm->mm, bprm->file);
-
-        filename_to_taskname(bprm->tcomm, bprm->filename, sizeof(bprm->tcomm));
         /*
          * Release all of the old mmap stuff
          */
@@ -1127,7 +1110,7 @@ void setup_new_exec(struct linux_binprm * bprm)
         else
                 set_dumpable(current->mm, suid_dumpable);
 
-        set_task_comm(current, bprm->tcomm);
+        set_task_comm(current, kbasename(bprm->filename));
 
         /* Set the new mm task size. We have to do that late because it may
          * depend on TIF_32BIT which is only updated in flush_thread() on
diff --git a/include/linux/binfmts.h b/include/linux/binfmts.h
index b4a745d7d9a9..61f29e5ea840 100644
--- a/include/linux/binfmts.h
+++ b/include/linux/binfmts.h
@@ -44,7 +44,6 @@ struct linux_binprm {
         unsigned interp_flags;
         unsigned interp_data;
         unsigned long loader, exec;
-        char tcomm[TASK_COMM_LEN];
 };
 
 #define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 6c70645eb3b6..f8497059f88c 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2357,7 +2357,7 @@ extern long do_fork(unsigned long, unsigned long, unsigned long, int __user *, i
 struct task_struct *fork_idle(int);
 extern pid_t kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
 
-extern void set_task_comm(struct task_struct *tsk, char *from);
+extern void set_task_comm(struct task_struct *tsk, const char *from);
 extern char *get_task_comm(char *to, struct task_struct *tsk);
 
 #ifdef CONFIG_SMP
diff --git a/include/trace/events/task.h b/include/trace/events/task.h
index 102a646e1996..dee3bb1d5a6b 100644
--- a/include/trace/events/task.h
+++ b/include/trace/events/task.h
@@ -32,7 +32,7 @@ TRACE_EVENT(task_newtask,
 
 TRACE_EVENT(task_rename,
 
-        TP_PROTO(struct task_struct *task, char *comm),
+        TP_PROTO(struct task_struct *task, const char *comm),
 
         TP_ARGS(task, comm),