fs/procfs: fix the comment above proc_pid_wchan()

proc_pid_wchan() used to report kernel addresses to user space but that is
no longer the case today.  Bring the comment above proc_pid_wchan() in
sync with the implementation.

Link: https://lkml.kernel.org/r/[email protected]
Fixes: b2f7392 ("fs/proc, core/debug: Don't expose absolute kernel addresses via wchan")
Signed-off-by: Bart Van Assche <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Eric W. Biederman <[email protected]>
Cc: Alexey Dobriyan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: bvanassche

fs/proc/base.c

@@ -416,7 +416,7 @@ static const struct file_operations proc_pid_cmdline_ops = {
 #ifdef CONFIG_KALLSYMS
 /*
  * Provides a wchan file via kallsyms in a proper one-value-per-file format.
- * Returns the resolved symbol.  If that fails, simply return the address.
+ * Returns the resolved symbol to user space.
  */
 static int proc_pid_wchan(struct seq_file *m, struct pid_namespace *ns,
 			  struct pid *pid, struct task_struct *task)