From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:60334 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390473AbeHNUeT (ORCPT ); Tue, 14 Aug 2018 16:34:19 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jason Gunthorpe , Jack Morgenstein , Leon Romanovsky , Sudip Mukherjee Subject: [PATCH 4.4 13/43] IB/core: Make testing MR flags for writability a static inline function Date: Tue, 14 Aug 2018 19:17:49 +0200 Message-Id: <20180814171517.962689861@linuxfoundation.org> In-Reply-To: <20180814171517.014285600@linuxfoundation.org> References: <20180814171517.014285600@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jack Morgenstein commit 08bb558ac11ab944e0539e78619d7b4c356278bd upstream. Make the MR writability flags check, which is performed in umem.c, a static inline function in file ib_verbs.h This allows the function to be used by low-level infiniband drivers. Cc: Signed-off-by: Jason Gunthorpe Signed-off-by: Jack Morgenstein Signed-off-by: Leon Romanovsky Signed-off-by: Sudip Mukherjee Signed-off-by: Greg Kroah-Hartman --- drivers/infiniband/core/umem.c | 11 +---------- include/rdma/ib_verbs.h | 14 ++++++++++++++ 2 files changed, 15 insertions(+), 10 deletions(-) --- a/drivers/infiniband/core/umem.c +++ b/drivers/infiniband/core/umem.c @@ -122,16 +122,7 @@ struct ib_umem *ib_umem_get(struct ib_uc umem->address = addr; umem->page_size = PAGE_SIZE; umem->pid = get_task_pid(current, PIDTYPE_PID); - /* - * We ask for writable memory if any of the following - * access flags are set. "Local write" and "remote write" - * obviously require write access. "Remote atomic" can do - * things like fetch and add, which will modify memory, and - * "MW bind" can change permissions by binding a window. - */ - umem->writable = !!(access & - (IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE | - IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_MW_BIND)); + umem->writable = ib_access_writable(access); if (access & IB_ACCESS_ON_DEMAND) { put_pid(umem->pid); --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -3007,6 +3007,20 @@ static inline int ib_check_mr_access(int return 0; } +static inline bool ib_access_writable(int access_flags) +{ + /* + * We have writable memory backing the MR if any of the following + * access flags are set. "Local write" and "remote write" obviously + * require write access. "Remote atomic" can do things like fetch and + * add, which will modify memory, and "MW bind" can change permissions + * by binding a window. + */ + return access_flags & + (IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE | + IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_MW_BIND); +} + /** * ib_check_mr_status: lightweight check of MR status. * This routine may provide status checks on a selected