From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754645AbaDOSR5 (ORCPT ); Tue, 15 Apr 2014 14:17:57 -0400 Received: from mga02.intel.com ([134.134.136.20]:59594 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753984AbaDOSRx (ORCPT ); Tue, 15 Apr 2014 14:17:53 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,865,1389772800"; d="scan'208";a="493683470" From: Srinivas Pandruvada To: jic23@kernel.org Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Srinivas Pandruvada Subject: [Patch v6 1/6] devres: introduce API "devm_kmemdup Date: Tue, 15 Apr 2014 11:21:08 -0700 Message-Id: <1397586073-31507-2-git-send-email-srinivas.pandruvada@linux.intel.com> X-Mailer: git-send-email 1.7.11.7 In-Reply-To: <1397586073-31507-1-git-send-email-srinivas.pandruvada@linux.intel.com> References: <1397586073-31507-1-git-send-email-srinivas.pandruvada@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Introduce devm_kmemdup, which uses resource managed kmalloc. There are several request from maintainers to add this instead of using kmemdup. Signed-off-by: Srinivas Pandruvada --- Documentation/driver-model/devres.txt | 1 + drivers/base/devres.c | 21 +++++++++++++++++++++ include/linux/device.h | 2 ++ 3 files changed, 24 insertions(+) diff --git a/Documentation/driver-model/devres.txt b/Documentation/driver-model/devres.txt index 4f7897e..4999518 100644 --- a/Documentation/driver-model/devres.txt +++ b/Documentation/driver-model/devres.txt @@ -236,6 +236,7 @@ certainly invest a bit more effort into libata core layer). MEM devm_kzalloc() devm_kfree() + devm_kmemdup() IIO devm_iio_device_alloc() diff --git a/drivers/base/devres.c b/drivers/base/devres.c index db4e264..d0914cb 100644 --- a/drivers/base/devres.c +++ b/drivers/base/devres.c @@ -831,3 +831,24 @@ void devm_kfree(struct device *dev, void *p) WARN_ON(rc); } EXPORT_SYMBOL_GPL(devm_kfree); + +/** + * devm_kmemdup - Resource-managed kmemdup + * @dev: Device this memory belongs to + * @src: Memory region to duplicate + * @len: Memory region length + * @gfp: GFP mask to use + * + * Duplicate region of a memory using resource managed kmalloc + */ +void *devm_kmemdup(struct device *dev, const void *src, size_t len, gfp_t gfp) +{ + void *p; + + p = devm_kmalloc(dev, len, gfp); + if (p) + memcpy(p, src, len); + + return p; +} +EXPORT_SYMBOL_GPL(devm_kmemdup); diff --git a/include/linux/device.h b/include/linux/device.h index 233bbbe..4a37849 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -629,6 +629,8 @@ static inline void *devm_kcalloc(struct device *dev, } extern void devm_kfree(struct device *dev, void *p); extern char *devm_kstrdup(struct device *dev, const char *s, gfp_t gfp); +extern void *devm_kmemdup(struct device *dev, const void *src, size_t len, + gfp_t gfp); void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res); void __iomem *devm_request_and_ioremap(struct device *dev, -- 1.7.11.7