From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-3111943-1517350511-2-5055791569795083371 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.001, RCVD_IN_DNSWL_MED -2.3, SPF_PASS -0.001, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='140.211.166.137', Host='smtp4.osuosl.org', Country='US', FromHeader='org', MailFrom='org' X-Spam-charsets: plain='us-ascii' X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: driverdev-devel-bounces@linuxdriverproject.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1517350511; b=DmXUBC7/cG455YTqeO8hreRHotgCocGt2utI4JX9sFASCrw ASD2CZWhtI8Ce1tlFm1Jqo4LinossMGbcyO+ml4pugdCgd9jmLkBAyf1spE4qLBb esz52UBH6mJt01uktqPiSRVgeNo3rtJaH4yUCtjHnL/z0Usw86nmobw6+6TKwaWl D9yoeQ7WcfnRWTXyKXs10RB7i5rkO8CG5DAPpIf0PMtBqDJ7tOARewgvD1IXWtHL Tv5ORZnc69v4UabEtpeOlJTQBswvR4NQsquLUW35EUUbtUqzjFIYsLC/0Y7NjpxK Q1xHkCHpZ3BxeRohUKNYWb0i4CPL0hleY3u7DOA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=date:from:to:subject:message-id :references:mime-version:in-reply-to:list-id:list-unsubscribe :list-archive:list-post:list-help:list-subscribe:cc:content-type :content-transfer-encoding:sender; s=arctest; t=1517350511; bh=x 3Gq6Y9N1jRLKVViWQ+HBMjOatFYhh2BNHErsz89jAs=; b=lEGQjK2hO2BEOI/I7 jw7MYuDKptxRH9ptEuSd2EgkaTHOlTNz+VNv9Dvn0yIb7WfutNaxaQRG8dBIuowa /sRx0OQIDiif1ksvE9BL6YwQcMNSQkmJR1o3BJXHo/PZ3WqAvU8vR/M2Z08fBb4H KL4uxT6bn9s6CZu8EcODrKilrxIFa9OI3GdFZN/h2mpSBesUtkKq0o5HDbWUXsuG Fs5MagPd/UAi+eMVruI5RcNfvjh2Xk5JZNaM4Vrni5BOpt2PBoGql4P/CYa94wh1 3TcCXut2dXkHFdDlM2nn7DJYaHrUePfiA6l0C3exXXMX6SKWL0EP95WfI060TQaP koDUg== ARC-Authentication-Results: i=1; mx3.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=linuxfoundation.org; iprev=pass policy.iprev=140.211.166.137 (smtp4.osuosl.org); spf=pass smtp.mailfrom=driverdev-devel-bounces@linuxdriverproject.org smtp.helo=fraxinus.osuosl.org; x-aligned-from=fail; x-ptr=fail x-ptr-helo=fraxinus.osuosl.org x-ptr-lookup=smtp4.osuosl.org; x-return-mx=pass smtp.domain=linuxdriverproject.org smtp.result=pass smtp_is_org_domain=yes header.domain=linuxfoundation.org header.result=pass header_is_org_domain=yes; x-tls=pass version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128 Authentication-Results: mx3.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=linuxfoundation.org; iprev=pass policy.iprev=140.211.166.137 (smtp4.osuosl.org); spf=pass smtp.mailfrom=driverdev-devel-bounces@linuxdriverproject.org smtp.helo=fraxinus.osuosl.org; x-aligned-from=fail; x-ptr=fail x-ptr-helo=fraxinus.osuosl.org x-ptr-lookup=smtp4.osuosl.org; x-return-mx=pass smtp.domain=linuxdriverproject.org smtp.result=pass smtp_is_org_domain=yes header.domain=linuxfoundation.org header.result=pass header_is_org_domain=yes; x-tls=pass version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128 X-Remote-Delivered-To: driverdev-devel@osuosl.org Date: Tue, 30 Jan 2018 23:15:01 +0100 From: Greg KH To: Alexey Skidanov Subject: Re: [PATCH v2] staging: android: ion: Add implementation of dma_buf_vmap and dma_buf_vunmap Message-ID: <20180130221501.GA6717@kroah.com> References: <1517344753-29021-1-git-send-email-alexey.skidanov@intel.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1517344753-29021-1-git-send-email-alexey.skidanov@intel.com> User-Agent: Mutt/1.9.3 (2018-01-21) X-BeenThere: driverdev-devel@linuxdriverproject.org X-Mailman-Version: 2.1.24 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: driverdev-devel-bounces@linuxdriverproject.org Sender: "devel" X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On Tue, Jan 30, 2018 at 10:39:13PM +0200, Alexey Skidanov wrote: > dma_buf_vmap and dma_buf_vunmap allow drivers to access buffers, created by ion. But why would anyone ever want to do that? What is wrong with the existing interfaces that drivers use to access buffers created by ion? What code uses this new interface? We need a bit more information please. thanks, greg k-h _______________________________________________ devel mailing list devel@linuxdriverproject.org http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel