From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.9]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 45B5F12F580; Thu, 29 Feb 2024 14:46:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.9 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709217976; cv=none; b=VS9aroMDYCiSnQfbzqiwTF2hOJwdNmTFtiKBHhnA2s5wD6h74iVRZ+Mg/v0izkTuzTfiW6i3uGeX5kruMWX7NiP8dpiVZd4DA9eYOsE9CeVFMP0pV+gs+BkiFk8DoIog5k/DN8+jF1Z+XVLekDijTGMSrIH7E8jONeX/P4zJhwg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709217976; c=relaxed/simple; bh=3oJedtpUCDtslx7gH0XWE1db//lVWLZiW0moWQs5pns=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=tnzziS+SGUybs37gtJ47O09/ecGep4MUf+INHa60vGNCkhUYHo36Dha5IeQnvxTrA7BKCMjzhbciTSX95tjB+X8i5GKQmAAGdM0SvSSGvYEJyUYIgEeMtvyU3jsau2sXmY56eHwbrv/609qmf+zG1g/EtcAjoUqdqe038mIgRI8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=Nx4DrTWh; arc=none smtp.client-ip=192.198.163.9 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="Nx4DrTWh" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1709217974; x=1740753974; h=from:to:cc:subject:in-reply-to:references:date: message-id:mime-version; bh=3oJedtpUCDtslx7gH0XWE1db//lVWLZiW0moWQs5pns=; b=Nx4DrTWhVC49Th+tSpQVjHaVueYcYd/zpj2fiTuktm4IzKhEjVXuQAif VhSlWhQEbV7ZnfhOFwY3Hz4Q/E93ryVOI7Dj+STxAbSN0Nw7gUK09bPNZ 2ldyst25rw59deXTuLJcDa+f5fqMcZB5m9eAu+gR6aQpmNPJERx0BTCpc RhaKi6gNqk+uyB00FJl7ozysAf/L3aON3qW6KnsNWQktzrta/Y7CWSgEf W6mAGZ27g5BMF/5lPEiLnshykFCixpd7lT9uet2bkDM7rI7DjGTzLZkwS 55pqB0JhgZEcJXXrPP6AgnjVdnuyNgrQK0JNI6nXv20suYU5C36tHnTvZ A==; X-IronPort-AV: E=McAfee;i="6600,9927,10998"; a="14398435" X-IronPort-AV: E=Sophos;i="6.06,194,1705392000"; d="scan'208";a="14398435" Received: from fmviesa006.fm.intel.com ([10.60.135.146]) by fmvoesa103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Feb 2024 06:46:13 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.06,194,1705392000"; d="scan'208";a="8080548" Received: from unknown (HELO localhost) ([10.237.66.160]) by fmviesa006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Feb 2024 06:46:09 -0800 From: Jani Nikula To: Christophe JAILLET , Rodrigo Vivi , Joonas Lahtinen , Tvrtko Ursulin , David Airlie , Daniel Vetter Cc: linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org, Christophe JAILLET , intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: Re: [PATCH] drm/i915/display: Save a few bytes of memory in intel_backlight_device_register() In-Reply-To: Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo References: Date: Thu, 29 Feb 2024 16:46:07 +0200 Message-ID: <8734tb8h1s.fsf@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain On Fri, 23 Feb 2024, Christophe JAILLET wrote: > '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 Thanks, pushed to drm-intel-next. BR, Jani. > --- > Compile tested only > --- > drivers/gpu/drm/i915/display/intel_backlight.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/drivers/gpu/drm/i915/display/intel_backlight.c b/drivers/gpu/drm/i915/display/intel_backlight.c > index 1946d7fb3c2e..9e4a9d4f1585 100644 > --- 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; > } -- Jani Nikula, Intel