Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933624AbcKDVKM (ORCPT ); Fri, 4 Nov 2016 17:10:12 -0400 Received: from hqemgate15.nvidia.com ([216.228.121.64]:9852 "EHLO hqemgate15.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933039AbcKDVKJ (ORCPT ); Fri, 4 Nov 2016 17:10:09 -0400 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Fri, 04 Nov 2016 14:10:07 -0700 From: Kirti Wankhede To: , , , CC: , , , , , , Kirti Wankhede Subject: [PATCH v11 06/22] vfio iommu type1: Update arguments of vfio_lock_acct Date: Sat, 5 Nov 2016 02:40:40 +0530 Message-ID: <1478293856-8191-7-git-send-email-kwankhede@nvidia.com> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1478293856-8191-1-git-send-email-kwankhede@nvidia.com> References: <1478293856-8191-1-git-send-email-kwankhede@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2303 Lines: 84 Updated arguments of vfio_lock_acct to take mm structure as input argument Signed-off-by: Kirti Wankhede Signed-off-by: Neo Jia Change-Id: I5d3673cc9d3786bb436b395d5f74537f1a36da80 --- drivers/vfio/vfio_iommu_type1.c | 22 ++++++++++------------ 1 file changed, 10 insertions(+), 12 deletions(-) diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index 7fb87f008e0a..02b302d0b7de 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -150,17 +150,16 @@ static void vfio_lock_acct_bg(struct work_struct *work) kfree(vwork); } -static void vfio_lock_acct(long npage) +static void vfio_lock_acct(struct mm_struct *mm, long npage) { struct vwork *vwork; - struct mm_struct *mm; - if (!current->mm || !npage) + if (!mm || !npage) return; /* process exited or nothing to do */ - if (down_write_trylock(¤t->mm->mmap_sem)) { - current->mm->locked_vm += npage; - up_write(¤t->mm->mmap_sem); + if (down_write_trylock(&mm->mmap_sem)) { + mm->locked_vm += npage; + up_write(&mm->mmap_sem); return; } @@ -172,8 +171,7 @@ static void vfio_lock_acct(long npage) vwork = kmalloc(sizeof(struct vwork), GFP_KERNEL); if (!vwork) return; - mm = get_task_mm(current); - if (!mm) { + if (!mmget_not_zero(mm)) { kfree(vwork); return; } @@ -285,7 +283,7 @@ static long __vfio_pin_pages_remote(unsigned long vaddr, long npage, if (unlikely(disable_hugepages)) { if (!rsvd) - vfio_lock_acct(1); + vfio_lock_acct(current->mm, 1); return 1; } @@ -313,7 +311,7 @@ static long __vfio_pin_pages_remote(unsigned long vaddr, long npage, } if (!rsvd) - vfio_lock_acct(i); + vfio_lock_acct(current->mm, i); return i; } @@ -328,7 +326,7 @@ static long __vfio_unpin_pages_remote(unsigned long pfn, long npage, unlocked += put_pfn(pfn++, prot); if (do_accounting) - vfio_lock_acct(-unlocked); + vfio_lock_acct(current->mm, -unlocked); return unlocked; } @@ -390,7 +388,7 @@ static void vfio_unmap_unpin(struct vfio_iommu *iommu, struct vfio_dma *dma) cond_resched(); } - vfio_lock_acct(-unlocked); + vfio_lock_acct(current->mm, -unlocked); } static void vfio_remove_dma(struct vfio_iommu *iommu, struct vfio_dma *dma) -- 2.7.0