From 3624a2486c8ca10a2c730c704441fdd034a0d9b7 Mon Sep 17 00:00:00 2001 From: Kirti Wankhede Date: Thu, 17 Nov 2016 02:16:18 +0530 Subject: [PATCH] vfio iommu type1: Update arguments of vfio_lock_acct Added task structure as input argument to vfio_lock_acct() function. Signed-off-by: Kirti Wankhede Signed-off-by: Neo Jia Signed-off-by: Alex Williamson --- drivers/vfio/vfio_iommu_type1.c | 30 ++++++++++++++++-------------- 1 file changed, 16 insertions(+), 14 deletions(-) diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index 9f3d58d3dfaf..34d17e51dc97 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -150,17 +150,22 @@ 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 task_struct *task, long npage) { struct vwork *vwork; struct mm_struct *mm; - if (!current->mm || !npage) + if (!npage) + return; + + mm = get_task_mm(task); + if (!mm) 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); + mmput(mm); return; } @@ -170,11 +175,8 @@ static void vfio_lock_acct(long npage) * wouldn't need this silliness */ vwork = kmalloc(sizeof(struct vwork), GFP_KERNEL); - if (!vwork) - return; - mm = get_task_mm(current); - if (!mm) { - kfree(vwork); + if (!vwork) { + mmput(mm); return; } INIT_WORK(&vwork->work, vfio_lock_acct_bg); @@ -285,7 +287,7 @@ 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, 1); return 1; } @@ -313,7 +315,7 @@ static long vfio_pin_pages_remote(unsigned long vaddr, long npage, } if (!rsvd) - vfio_lock_acct(i); + vfio_lock_acct(current, i); return i; } @@ -328,7 +330,7 @@ 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, -unlocked); return unlocked; } @@ -390,7 +392,7 @@ static void vfio_unmap_unpin(struct vfio_iommu *iommu, struct vfio_dma *dma) cond_resched(); } - vfio_lock_acct(-unlocked); + vfio_lock_acct(current, -unlocked); } static void vfio_remove_dma(struct vfio_iommu *iommu, struct vfio_dma *dma) -- 2.20.1