From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933106Ab2GBVQi (ORCPT ); Mon, 2 Jul 2012 17:16:38 -0400 Received: from e8.ny.us.ibm.com ([32.97.182.138]:43850 "EHLO e8.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932209Ab2GBVQh (ORCPT ); Mon, 2 Jul 2012 17:16:37 -0400 From: Seth Jennings To: Greg Kroah-Hartman Cc: Seth Jennings , Andrew Morton , Dan Magenheimer , Konrad Rzeszutek Wilk , Nitin Gupta , Minchan Kim , Robert Jennings , linux-mm@kvack.org, devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org Subject: [PATCH 3/4] zsmalloc: add details to zs_map_object boiler plate Date: Mon, 2 Jul 2012 16:15:51 -0500 Message-Id: <1341263752-10210-4-git-send-email-sjenning@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1341263752-10210-1-git-send-email-sjenning@linux.vnet.ibm.com> References: <1341263752-10210-1-git-send-email-sjenning@linux.vnet.ibm.com> X-Content-Scanned: Fidelis XPS MAILER x-cbid: 12070221-9360-0000-0000-000008078896 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add information on the usage limits of zs_map_object() Signed-off-by: Seth Jennings --- drivers/staging/zsmalloc/zsmalloc-main.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/staging/zsmalloc/zsmalloc-main.c b/drivers/staging/zsmalloc/zsmalloc-main.c index 4942d41..abf7c13 100644 --- a/drivers/staging/zsmalloc/zsmalloc-main.c +++ b/drivers/staging/zsmalloc/zsmalloc-main.c @@ -747,7 +747,12 @@ EXPORT_SYMBOL_GPL(zs_free); * * Before using an object allocated from zs_malloc, it must be mapped using * this function. When done with the object, it must be unmapped using - * zs_unmap_object + * zs_unmap_object. + * + * Only one object can be mapped per cpu at a time. There is no protection + * against nested mappings. + * + * This function returns with preemption and page faults disabled. */ void *zs_map_object(struct zs_pool *pool, unsigned long handle) { -- 1.7.9.5