[PATCH] proc/wchan: Use printk format instead of lookup_symbol_name()

[Helge Deller]

To resolve the symbol fuction name for wchan, use the printk format
specifier %ps instead of manually looking up the symbol function name
via lookup_symbol_name().

Signed-off-by: Helge Deller <del...@gmx.de>

diff --git a/fs/proc/base.c b/fs/proc/base.c
index b362523a9829..c4593e1cafa4 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -67,7 +67,6 @@
 #include <linux/mm.h>
 #include <linux/swap.h>
 #include <linux/rcupdate.h>
-#include <linux/kallsyms.h>
 #include <linux/stacktrace.h>
 #include <linux/resource.h>
 #include <linux/module.h>
@@ -386,19 +385,17 @@ static int proc_pid_wchan(struct seq_file *m, struct 
pid_namespace *ns,
                          struct pid *pid, struct task_struct *task)
 {
        unsigned long wchan;
-       char symname[KSYM_NAME_LEN];

-       if (!ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS))
-               goto print0;
+       if (ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS))
+               wchan = get_wchan(task);
+       else
+               wchan = 0;

-       wchan = get_wchan(task);
-       if (wchan && !lookup_symbol_name(wchan, symname)) {
-               seq_puts(m, symname);
-               return 0;
-       }
+       if (wchan)
+               seq_printf(m, "%ps", (void *) wchan);
+       else
+               seq_putc(m, '0');

-print0:
-       seq_putc(m, '0');
        return 0;
 }
 #endif /* CONFIG_KALLSYMS */