From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephan Mueller Subject: Re: [PATCH v2 1/2] lib/scatterlist: Add sg_len helper Date: Tue, 22 Sep 2015 07:52:02 +0200 Message-ID: <1629054.0zdmkST5GO@tauon.atsec.com> References: <20150921234408.23782.52608.stgit@tstruk-mobl1> <20150921234414.23782.63763.stgit@tstruk-mobl1> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7Bit Cc: herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, qat-linux@intel.com To: Tadeusz Struk Return-path: Received: from mail.eperm.de ([89.247.134.16]:34145 "EHLO mail.eperm.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750732AbbIVFwG (ORCPT ); Tue, 22 Sep 2015 01:52:06 -0400 In-Reply-To: <20150921234414.23782.63763.stgit@tstruk-mobl1> Sender: linux-crypto-owner@vger.kernel.org List-ID: Am Montag, 21. September 2015, 16:44:14 schrieb Tadeusz Struk: Hi Tadeusz, >Add sg_len function which returns the total number of bytes in sg. > >Signed-off-by: Tadeusz Struk >--- > include/linux/scatterlist.h | 1 + > lib/scatterlist.c | 18 ++++++++++++++++++ > 2 files changed, 19 insertions(+) > >diff --git a/include/linux/scatterlist.h b/include/linux/scatterlist.h >index 556ec1e..1ca63bd 100644 >--- a/include/linux/scatterlist.h >+++ b/include/linux/scatterlist.h >@@ -242,6 +242,7 @@ static inline void *sg_virt(struct scatterlist *sg) > } > > int sg_nents(struct scatterlist *sg); >+int sg_len(struct scatterlist *sg); > int sg_nents_for_len(struct scatterlist *sg, u64 len); > struct scatterlist *sg_next(struct scatterlist *); > struct scatterlist *sg_last(struct scatterlist *s, unsigned int); >diff --git a/lib/scatterlist.c b/lib/scatterlist.c >index bafa993..dc71f27 100644 >--- a/lib/scatterlist.c >+++ b/lib/scatterlist.c >@@ -57,6 +57,24 @@ int sg_nents(struct scatterlist *sg) > EXPORT_SYMBOL(sg_nents); > > /** >+ * sg_len - return total size of bytes in the scatterlist >+ * @sg: The scatterlist >+ * >+ * Description: >+ * Allows to know how the total size of bytes in sg, taking into acount >+ * chaining as well >+ **/ >+int sg_len(struct scatterlist *sg) >+{ >+ int len; Is there a reason why unsigned int is not used? Note, this applies to the users of that function too. >+ >+ for (len = 0; sg; sg = sg_next(sg)) >+ len += sg->length; >+ return len; >+} >+EXPORT_SYMBOL(sg_len); >+ >+/** > * sg_nents_for_len - return total count of entries in scatterlist > * needed to satisfy the supplied length > * @sg: The scatterlist > >-- >To unsubscribe from this list: send the line "unsubscribe linux-crypto" in >the body of a message to majordomo@vger.kernel.org >More majordomo info at http://vger.kernel.org/majordomo-info.html Ciao Stephan