drm/i915/display: Save a few bytes of memory in intel_backlight_device_register()

'name' may still be "intel_backlight" when backlight_device_register()
is called. In such a case, using kstrdup_const() saves a memory
duplication when dev_set_name() is called in
backlight_device_register().

Use kfree_const() accordingly.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/ecfdb3af5005e05131e2fb93fd870830f39a8c29.1708708142.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

diff --git a/drivers/gpu/drm/i915/display/intel_backlight.c b/drivers/gpu/drm/i915/display/intel_backlight.c
index 1946d7fb3c2e512b50e7715c9d50e7109b9e190e..9e4a9d4f1585b7af7d71384185bbbf7961213d23 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_backlight.c
+++ b/drivers/gpu/drm/i915/display/intel_backlight.c
@@ -949,7 +949,7 @@ int intel_backlight_device_register(struct intel_connector *connector)
        else
                props.power = FB_BLANK_POWERDOWN;
 
-       name = kstrdup("intel_backlight", GFP_KERNEL);
+       name = kstrdup_const("intel_backlight", GFP_KERNEL);
        if (!name)
                return -ENOMEM;
 
@@ -963,7 +963,7 @@ int intel_backlight_device_register(struct intel_connector *connector)
                 * compatibility. Use unique names for subsequent backlight devices as a
                 * fallback when the default name already exists.
                 */
-               kfree(name);
+               kfree_const(name);
                name = kasprintf(GFP_KERNEL, "card%d-%s-backlight",
                                 i915->drm.primary->index, connector->base.name);
                if (!name)
@@ -987,7 +987,7 @@ int intel_backlight_device_register(struct intel_connector *connector)
                    connector->base.base.id, connector->base.name, name);
 
 out:
-       kfree(name);
+       kfree_const(name);
 
        return ret;
 }