lib/dynamic_debug.c: use kstrdup_const

Using kstrdup_const, thus reusing .rodata when possible, saves around 2 kB
of runtime memory on my laptop/.config combination.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Jason Baron <jbaron@akamai.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index e491e02eff54..e3952e9c8ec0 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -42,7 +42,7 @@ extern struct _ddebug __stop___verbose[];
 
 struct ddebug_table {
         struct list_head link;
-        char *mod_name;
+        const char *mod_name;
         unsigned int num_ddebugs;
         struct _ddebug *ddebugs;
 };
@@ -841,12 +841,12 @@ int ddebug_add_module(struct _ddebug *tab, unsigned int n,
                              const char *name)
 {
         struct ddebug_table *dt;
-        char *new_name;
+        const char *new_name;
 
         dt = kzalloc(sizeof(*dt), GFP_KERNEL);
         if (dt == NULL)
                 return -ENOMEM;
-        new_name = kstrdup(name, GFP_KERNEL);
+        new_name = kstrdup_const(name, GFP_KERNEL);
         if (new_name == NULL) {
                 kfree(dt);
                 return -ENOMEM;
@@ -907,7 +907,7 @@ int ddebug_dyndbg_module_param_cb(char *param, char *val, const char *module)
 static void ddebug_table_free(struct ddebug_table *dt)
 {
         list_del_init(&dt->link);
-        kfree(dt->mod_name);
+        kfree_const(dt->mod_name);
         kfree(dt);
 }