From:   Daniel Jordan <daniel.m.jordan@oracle.com>
To:     Alexander Duyck <alexanderduyck@fb.com>,
        Alex Williamson <alex.williamson@redhat.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Ben Segall <bsegall@google.com>,
        Cornelia Huck <cohuck@redhat.com>,
        Dan Williams <dan.j.williams@intel.com>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Dietmar Eggemann <dietmar.eggemann@arm.com>,
        Herbert Xu <herbert@gondor.apana.org.au>,
        Ingo Molnar <mingo@redhat.com>,
        Jason Gunthorpe <jgg@nvidia.com>,
        Johannes Weiner <hannes@cmpxchg.org>,
        Josh Triplett <josh@joshtriplett.org>,
        Michal Hocko <mhocko@suse.com>, Nico Pache <npache@redhat.com>,
        Pasha Tatashin <pasha.tatashin@soleen.com>,
        Peter Zijlstra <peterz@infradead.org>,
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        Steve Sistare <steven.sistare@oracle.com>,
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        Vincent Guittot <vincent.guittot@linaro.org>
Cc:     linux-mm@kvack.org, kvm@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org,
        Daniel Jordan <daniel.m.jordan@oracle.com>
Subject: [RFC 05/16] vfio/type1: Pass mm to vfio_pin_pages_remote()
Date:   Wed,  5 Jan 2022 19:46:45 -0500
Message-Id: <20220106004656.126790-6-daniel.m.jordan@oracle.com>
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Refactoring for later, when padata helpers need to use the main thread's
mm.

Signed-off-by: Daniel Jordan <daniel.m.jordan@oracle.com>
---
 drivers/vfio/vfio_iommu_type1.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index 0b4f7c174c7a..26bb2d9b698b 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -649,10 +649,10 @@ static int vfio_wait_all_valid(struct vfio_iommu *iommu)
  */
 static long vfio_pin_pages_remote(struct vfio_dma *dma, unsigned long vaddr,
 				  long npage, unsigned long *pfn_base,
-				  unsigned long limit, struct vfio_batch *batch)
+				  unsigned long limit, struct vfio_batch *batch,
+				  struct mm_struct *mm)
 {
 	unsigned long pfn;
-	struct mm_struct *mm = current->mm;
 	long ret, pinned = 0, lock_acct = 0;
 	bool rsvd;
 	dma_addr_t iova = vaddr - dma->vaddr + dma->iova;
@@ -1500,7 +1500,7 @@ static int vfio_pin_map_dma(struct vfio_iommu *iommu, struct vfio_dma *dma,
 		/* Pin a contiguous chunk of memory */
 		npage = vfio_pin_pages_remote(dma, vaddr + dma->size,
 					      size >> PAGE_SHIFT, &pfn, limit,
-					      &batch);
+					      &batch, current->mm);
 		if (npage <= 0) {
 			WARN_ON(!npage);
 			ret = (int)npage;
@@ -1763,7 +1763,8 @@ static int vfio_iommu_replay(struct vfio_iommu *iommu,
 				npage = vfio_pin_pages_remote(dma, vaddr,
 							      n >> PAGE_SHIFT,
 							      &pfn, limit,
-							      &batch);
+							      &batch,
+							      current->mm);
 				if (npage <= 0) {
 					WARN_ON(!npage);
 					ret = (int)npage;
-- 
2.34.1