Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753271AbaGJVsB (ORCPT ); Thu, 10 Jul 2014 17:48:01 -0400 Received: from mail-we0-f173.google.com ([74.125.82.173]:58399 "EHLO mail-we0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751911AbaGJVsA (ORCPT ); Thu, 10 Jul 2014 17:48:00 -0400 From: Oded Gabbay X-Google-Original-From: Oded Gabbay To: Andrew Morton Cc: David Airlie , Alex Deucher , Jerome Glisse , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, John Bridgman , Andrew Lewycky , Joerg Roedel , linux-mm , Oded Gabbay , Rik van Riel , "Kirill A. Shutemov" , Mel Gorman , Peter Zijlstra , Joonsoo Kim , =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= , Michel Lespinasse Subject: [PATCH 01/83] mm: Add kfd_process pointer to mm_struct Date: Fri, 11 Jul 2014 00:47:26 +0300 Message-Id: <1405028848-5660-1-git-send-email-oded.gabbay@amd.com> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch enables the KFD to retrieve the kfd_process object from the process's mm_struct. This is needed because kfd_process lifespan is bound to the process's mm_struct lifespan. When KFD is notified about an mm_struct tear-down, it checks if the kfd_process pointer is valid. If so, it releases the kfd_process object and all relevant resources. Signed-off-by: Oded Gabbay --- include/linux/mm_types.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 678097c..6179107 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -20,6 +20,10 @@ struct hmm; #endif +#ifdef CONFIG_HSA_RADEON +struct kfd_process; +#endif + #ifndef AT_VECTOR_SIZE_ARCH #define AT_VECTOR_SIZE_ARCH 0 #endif @@ -439,6 +443,16 @@ struct mm_struct { */ struct hmm *hmm; #endif +#if defined(CONFIG_HSA_RADEON) || defined(CONFIG_HSA_RADEON_MODULE) + /* + * kfd always register an mmu_notifier we rely on mmu notifier to keep + * refcount on mm struct as well as forbiding registering kfd on a + * dying mm + * + * This field is set with mmap_sem old in write mode. + */ + struct kfd_process *kfd_process; +#endif #if defined(CONFIG_TRANSPARENT_HUGEPAGE) && !USE_SPLIT_PMD_PTLOCKS pgtable_t pmd_huge_pte; /* protected by page_table_lock */ #endif -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/