[PATCH V2 2/7] mm/gup: Change write parameter to flags in fast walk

2019-02-13 Thread ira.weiny--- via dri-devel 
From: Ira Weiny 

In order to support more options in the GUP fast walk, change
the write parameter to flags throughout the call stack.

This patch does not change functionality and passes FOLL_WRITE
where write was previously used.

Signed-off-by: Ira Weiny 
---
 mm/gup.c | 52 ++--
 1 file changed, 26 insertions(+), 26 deletions(-)

diff --git a/mm/gup.c b/mm/gup.c
index ee96eaff118c..681388236106 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -1417,7 +1417,7 @@ static void undo_dev_pagemap(int *nr, int nr_start, 
struct page **pages)
 
 #ifdef CONFIG_ARCH_HAS_PTE_SPECIAL
 static int gup_pte_range(pmd_t pmd, unsigned long addr, unsigned long end,
-int write, struct page **pages, int *nr)
+unsigned int flags, struct page **pages, int *nr)
 {
struct dev_pagemap *pgmap = NULL;
int nr_start = *nr, ret = 0;
@@ -1435,7 +1435,7 @@ static int gup_pte_range(pmd_t pmd, unsigned long addr, 
unsigned long end,
if (pte_protnone(pte))
goto pte_unmap;
 
-   if (!pte_access_permitted(pte, write))
+   if (!pte_access_permitted(pte, flags & FOLL_WRITE))
goto pte_unmap;
 
if (pte_devmap(pte)) {
@@ -1487,7 +1487,7 @@ static int gup_pte_range(pmd_t pmd, unsigned long addr, 
unsigned long end,
  * useful to have gup_huge_pmd even if we can't operate on ptes.
  */
 static int gup_pte_range(pmd_t pmd, unsigned long addr, unsigned long end,
-int write, struct page **pages, int *nr)
+unsigned int flags, struct page **pages, int *nr)
 {
return 0;
 }
@@ -1570,12 +1570,12 @@ static int __gup_device_huge_pud(pud_t pud, pud_t 
*pudp, unsigned long addr,
 #endif
 
 static int gup_huge_pmd(pmd_t orig, pmd_t *pmdp, unsigned long addr,
-   unsigned long end, int write, struct page **pages, int *nr)
+   unsigned long end, unsigned int flags, struct page **pages, int 
*nr)
 {
struct page *head, *page;
int refs;
 
-   if (!pmd_access_permitted(orig, write))
+   if (!pmd_access_permitted(orig, flags & FOLL_WRITE))
return 0;
 
if (pmd_devmap(orig))
@@ -1608,12 +1608,12 @@ static int gup_huge_pmd(pmd_t orig, pmd_t *pmdp, 
unsigned long addr,
 }
 
 static int gup_huge_pud(pud_t orig, pud_t *pudp, unsigned long addr,
-   unsigned long end, int write, struct page **pages, int *nr)
+   unsigned long end, unsigned int flags, struct page **pages, int 
*nr)
 {
struct page *head, *page;
int refs;
 
-   if (!pud_access_permitted(orig, write))
+   if (!pud_access_permitted(orig, flags & FOLL_WRITE))
return 0;
 
if (pud_devmap(orig))
@@ -1646,13 +1646,13 @@ static int gup_huge_pud(pud_t orig, pud_t *pudp, 
unsigned long addr,
 }
 
 static int gup_huge_pgd(pgd_t orig, pgd_t *pgdp, unsigned long addr,
-   unsigned long end, int write,
+   unsigned long end, unsigned int flags,
struct page **pages, int *nr)
 {
int refs;
struct page *head, *page;
 
-   if (!pgd_access_permitted(orig, write))
+   if (!pgd_access_permitted(orig, flags & FOLL_WRITE))
return 0;
 
BUILD_BUG_ON(pgd_devmap(orig));
@@ -1683,7 +1683,7 @@ static int gup_huge_pgd(pgd_t orig, pgd_t *pgdp, unsigned 
long addr,
 }
 
 static int gup_pmd_range(pud_t pud, unsigned long addr, unsigned long end,
-   int write, struct page **pages, int *nr)
+   unsigned int flags, struct page **pages, int *nr)
 {
unsigned long next;
pmd_t *pmdp;
@@ -1705,7 +1705,7 @@ static int gup_pmd_range(pud_t pud, unsigned long addr, 
unsigned long end,
if (pmd_protnone(pmd))
return 0;
 
-   if (!gup_huge_pmd(pmd, pmdp, addr, next, write,
+   if (!gup_huge_pmd(pmd, pmdp, addr, next, flags,
pages, nr))
return 0;
 
@@ -1715,9 +1715,9 @@ static int gup_pmd_range(pud_t pud, unsigned long addr, 
unsigned long end,
 * pmd format and THP pmd format
 */
if (!gup_huge_pd(__hugepd(pmd_val(pmd)), addr,
-PMD_SHIFT, next, write, pages, nr))
+PMD_SHIFT, next, flags, pages, nr))
return 0;
-   } else if (!gup_pte_range(pmd, addr, next, write, pages, nr))
+   } else if (!gup_pte_range(pmd, addr, next, flags, pages, nr))
return 0;
} while (pmdp++, addr = next, addr != end);
 
@@ -1725,7 +1725,7 @@ static int gup_pmd_range(pud_t pud, unsigned long addr, 
unsigned long end,
 }
 
 static int gup_pud_ran

[PATCH V2 3/7] mm/gup: Change GUP fast to use flags rather than a write 'bool'

2019-02-13 Thread ira.weiny--- via dri-devel 
From: Ira Weiny 

To facilitate additional options to get_user_pages_fast() change the
singular write parameter to be gup_flags.

This patch does not change any functionality.  New functionality will
follow in subsequent patches.

Some of the get_user_pages_fast() call sites were unchanged because they
already passed FOLL_WRITE or 0 for the write parameter.

Signed-off-by: Ira Weiny 
---
 arch/mips/mm/gup.c | 11 ++-
 arch/powerpc/kvm/book3s_64_mmu_hv.c|  4 ++--
 arch/powerpc/kvm/e500_mmu.c|  2 +-
 arch/powerpc/mm/mmu_context_iommu.c|  4 ++--
 arch/s390/kvm/interrupt.c  |  2 +-
 arch/s390/mm/gup.c | 12 ++--
 arch/sh/mm/gup.c   | 11 ++-
 arch/sparc/mm/gup.c|  9 +
 arch/x86/kvm/paging_tmpl.h |  2 +-
 arch/x86/kvm/svm.c |  2 +-
 drivers/fpga/dfl-afu-dma-region.c  |  2 +-
 drivers/gpu/drm/via/via_dmablit.c  |  3 ++-
 drivers/infiniband/hw/hfi1/user_pages.c|  3 ++-
 drivers/misc/genwqe/card_utils.c   |  2 +-
 drivers/misc/vmw_vmci/vmci_host.c  |  2 +-
 drivers/misc/vmw_vmci/vmci_queue_pair.c|  6 --
 drivers/platform/goldfish/goldfish_pipe.c  |  3 ++-
 drivers/rapidio/devices/rio_mport_cdev.c   |  4 +++-
 drivers/sbus/char/oradax.c |  2 +-
 drivers/scsi/st.c  |  3 ++-
 drivers/staging/gasket/gasket_page_table.c |  4 ++--
 drivers/tee/tee_shm.c  |  2 +-
 drivers/vfio/vfio_iommu_spapr_tce.c|  3 ++-
 drivers/vhost/vhost.c  |  2 +-
 drivers/video/fbdev/pvr2fb.c   |  2 +-
 drivers/virt/fsl_hypervisor.c  |  2 +-
 drivers/xen/gntdev.c   |  2 +-
 fs/orangefs/orangefs-bufmap.c  |  2 +-
 include/linux/mm.h |  4 ++--
 kernel/futex.c |  2 +-
 lib/iov_iter.c |  7 +--
 mm/gup.c   | 10 +-
 mm/util.c  |  8 
 net/ceph/pagevec.c |  2 +-
 net/rds/info.c |  2 +-
 net/rds/rdma.c |  3 ++-
 36 files changed, 81 insertions(+), 65 deletions(-)

diff --git a/arch/mips/mm/gup.c b/arch/mips/mm/gup.c
index 0d14e0d8eacf..4c2b4483683c 100644
--- a/arch/mips/mm/gup.c
+++ b/arch/mips/mm/gup.c
@@ -235,7 +235,7 @@ int __get_user_pages_fast(unsigned long start, int 
nr_pages, int write,
  * get_user_pages_fast() - pin user pages in memory
  * @start: starting user address
  * @nr_pages:  number of pages from start to pin
- * @write: whether pages will be written to
+ * @gup_flags: flags modifying pin behaviour
  * @pages: array that receives pointers to the pages pinned.
  * Should be at least nr_pages long.
  *
@@ -247,8 +247,8 @@ int __get_user_pages_fast(unsigned long start, int 
nr_pages, int write,
  * requested. If nr_pages is 0 or negative, returns 0. If no pages
  * were pinned, returns -errno.
  */
-int get_user_pages_fast(unsigned long start, int nr_pages, int write,
-   struct page **pages)
+int get_user_pages_fast(unsigned long start, int nr_pages,
+   unsigned int gup_flags, struct page **pages)
 {
struct mm_struct *mm = current->mm;
unsigned long addr, len, end;
@@ -273,7 +273,8 @@ int get_user_pages_fast(unsigned long start, int nr_pages, 
int write,
next = pgd_addr_end(addr, end);
if (pgd_none(pgd))
goto slow;
-   if (!gup_pud_range(pgd, addr, next, write, pages, &nr))
+   if (!gup_pud_range(pgd, addr, next, gup_flags & FOLL_WRITE,
+  pages, &nr))
goto slow;
} while (pgdp++, addr = next, addr != end);
local_irq_enable();
@@ -289,7 +290,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, 
int write,
pages += nr;
 
ret = get_user_pages_unlocked(start, (end - start) >> PAGE_SHIFT,
- pages, write ? FOLL_WRITE : 0);
+ pages, gup_flags);
 
/* Have to be a bit careful with return values */
if (nr > 0) {
diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c 
b/arch/powerpc/kvm/book3s_64_mmu_hv.c
index bd2dcfbf00cd..8fcb0a921e46 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_hv.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c
@@ -582,7 +582,7 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct 
kvm_vcpu *vcpu,
/* If writing != 0, then the HPTE must allow writing, if we get here */
write_ok = writing;
hva = gfn_to_hva_memslot(memslot, gfn);
-   npages = get_user_pages_fast(hva, 1, writing, pages);
+   npages = get_user_pages_fast(hva, 1

[PATCH V2 1/7] mm/gup: Replace get_user_pages_longterm() with FOLL_LONGTERM

2019-02-13 Thread ira.weiny--- via dri-devel 
From: Ira Weiny 

Rather than have a separate get_user_pages_longterm() call,
introduce FOLL_LONGTERM and change the longterm callers to use
it.

This patch does not change any functionality.

FOLL_LONGTERM can only be supported with get_user_pages() as it
requires vmas to determine if DAX is in use.

Signed-off-by: Ira Weiny 
---
 drivers/infiniband/core/umem.c |   5 +-
 drivers/infiniband/hw/qib/qib_user_pages.c |   8 +-
 drivers/infiniband/hw/usnic/usnic_uiom.c   |   9 +-
 drivers/media/v4l2-core/videobuf-dma-sg.c  |   6 +-
 drivers/vfio/vfio_iommu_type1.c|   3 +-
 include/linux/mm.h |  13 +-
 mm/gup.c   | 138 -
 mm/gup_benchmark.c |   5 +-
 8 files changed, 101 insertions(+), 86 deletions(-)

diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c
index b69d3efa8712..120a40df91b4 100644
--- a/drivers/infiniband/core/umem.c
+++ b/drivers/infiniband/core/umem.c
@@ -185,10 +185,11 @@ struct ib_umem *ib_umem_get(struct ib_udata *udata, 
unsigned long addr,
 
while (npages) {
down_read(&mm->mmap_sem);
-   ret = get_user_pages_longterm(cur_base,
+   ret = get_user_pages(cur_base,
 min_t(unsigned long, npages,
   PAGE_SIZE / sizeof (struct page *)),
-gup_flags, page_list, vma_list);
+gup_flags | FOLL_LONGTERM,
+page_list, vma_list);
if (ret < 0) {
up_read(&mm->mmap_sem);
goto umem_release;
diff --git a/drivers/infiniband/hw/qib/qib_user_pages.c 
b/drivers/infiniband/hw/qib/qib_user_pages.c
index ef8bcf366ddc..1b9368261035 100644
--- a/drivers/infiniband/hw/qib/qib_user_pages.c
+++ b/drivers/infiniband/hw/qib/qib_user_pages.c
@@ -114,10 +114,10 @@ int qib_get_user_pages(unsigned long start_page, size_t 
num_pages,
 
down_read(¤t->mm->mmap_sem);
for (got = 0; got < num_pages; got += ret) {
-   ret = get_user_pages_longterm(start_page + got * PAGE_SIZE,
- num_pages - got,
- FOLL_WRITE | FOLL_FORCE,
- p + got, NULL);
+   ret = get_user_pages(start_page + got * PAGE_SIZE,
+num_pages - got,
+FOLL_LONGTERM | FOLL_WRITE | FOLL_FORCE,
+p + got, NULL);
if (ret < 0) {
up_read(¤t->mm->mmap_sem);
goto bail_release;
diff --git a/drivers/infiniband/hw/usnic/usnic_uiom.c 
b/drivers/infiniband/hw/usnic/usnic_uiom.c
index 06862a6af185..1d9a182ac163 100644
--- a/drivers/infiniband/hw/usnic/usnic_uiom.c
+++ b/drivers/infiniband/hw/usnic/usnic_uiom.c
@@ -143,10 +143,11 @@ static int usnic_uiom_get_pages(unsigned long addr, 
size_t size, int writable,
ret = 0;
 
while (npages) {
-   ret = get_user_pages_longterm(cur_base,
-   min_t(unsigned long, npages,
-   PAGE_SIZE / sizeof(struct page *)),
-   gup_flags, page_list, NULL);
+   ret = get_user_pages(cur_base,
+min_t(unsigned long, npages,
+PAGE_SIZE / sizeof(struct page *)),
+gup_flags | FOLL_LONGTERM,
+page_list, NULL);
 
if (ret < 0)
goto out;
diff --git a/drivers/media/v4l2-core/videobuf-dma-sg.c 
b/drivers/media/v4l2-core/videobuf-dma-sg.c
index 08929c087e27..870a2a526e0b 100644
--- a/drivers/media/v4l2-core/videobuf-dma-sg.c
+++ b/drivers/media/v4l2-core/videobuf-dma-sg.c
@@ -186,12 +186,12 @@ static int videobuf_dma_init_user_locked(struct 
videobuf_dmabuf *dma,
dprintk(1, "init user [0x%lx+0x%lx => %d pages]\n",
data, size, dma->nr_pages);
 
-   err = get_user_pages_longterm(data & PAGE_MASK, dma->nr_pages,
-flags, dma->pages, NULL);
+   err = get_user_pages(data & PAGE_MASK, dma->nr_pages,
+flags | FOLL_LONGTERM, dma->pages, NULL);
 
if (err != dma->nr_pages) {
dma->nr_pages = (err >= 0) ? err : 0;
-   dprintk(1, "get_user_pages_longterm: err=%d [%d]\n", err,
+   dprintk(1, "get_user_pages: err=%d [%d]\n", err,
dma->nr_pages);
return err < 0 ? err : -EINVAL;
}
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index 73652e21efec..1500bd0bb6da 100644
--- a/drivers/vfio/

[PATCH V2 4/7] mm/gup: Add FOLL_LONGTERM capability to GUP fast

2019-02-13 Thread ira.weiny--- via dri-devel 
From: Ira Weiny 

DAX pages were previously unprotected from longterm pins when users
called get_user_pages_fast().

Use the new FOLL_LONGTERM flag to check for DEVMAP pages and fall
back to regular GUP processing if a DEVMAP page is encountered.

Signed-off-by: Ira Weiny 
---
 mm/gup.c | 24 +---
 1 file changed, 21 insertions(+), 3 deletions(-)

diff --git a/mm/gup.c b/mm/gup.c
index 6f32d36b3c5b..f7e759c523bb 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -1439,6 +1439,9 @@ static int gup_pte_range(pmd_t pmd, unsigned long addr, 
unsigned long end,
goto pte_unmap;
 
if (pte_devmap(pte)) {
+   if (unlikely(flags & FOLL_LONGTERM))
+   goto pte_unmap;
+
pgmap = get_dev_pagemap(pte_pfn(pte), pgmap);
if (unlikely(!pgmap)) {
undo_dev_pagemap(nr, nr_start, pages);
@@ -1578,8 +1581,11 @@ static int gup_huge_pmd(pmd_t orig, pmd_t *pmdp, 
unsigned long addr,
if (!pmd_access_permitted(orig, flags & FOLL_WRITE))
return 0;
 
-   if (pmd_devmap(orig))
+   if (pmd_devmap(orig)) {
+   if (unlikely(flags & FOLL_LONGTERM))
+   return 0;
return __gup_device_huge_pmd(orig, pmdp, addr, end, pages, nr);
+   }
 
refs = 0;
page = pmd_page(orig) + ((addr & ~PMD_MASK) >> PAGE_SHIFT);
@@ -1904,8 +1910,20 @@ int get_user_pages_fast(unsigned long start, int 
nr_pages,
start += nr << PAGE_SHIFT;
pages += nr;
 
-   ret = get_user_pages_unlocked(start, nr_pages - nr, pages,
- gup_flags);
+   if (gup_flags & FOLL_LONGTERM) {
+   down_read(¤t->mm->mmap_sem);
+   ret = __gup_longterm_locked(current, current->mm,
+   start, nr_pages - nr,
+   pages, NULL, gup_flags);
+   up_read(¤t->mm->mmap_sem);
+   } else {
+   /*
+* retain FAULT_FOLL_ALLOW_RETRY optimization if
+* possible
+*/
+   ret = get_user_pages_unlocked(start, nr_pages - nr,
+ pages, gup_flags);
+   }
 
/* Have to be a bit careful with return values */
if (nr > 0) {
-- 
2.20.1

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[PATCH V2 5/7] IB/hfi1: Use the new FOLL_LONGTERM flag to get_user_pages_fast()

2019-02-13 Thread ira.weiny--- via dri-devel 
From: Ira Weiny 

Use the new FOLL_LONGTERM to get_user_pages_fast() to protect against
FS DAX pages being mapped.

Signed-off-by: Ira Weiny 
---
 drivers/infiniband/hw/hfi1/user_pages.c | 6 --
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/user_pages.c 
b/drivers/infiniband/hw/hfi1/user_pages.c
index 78ccacaf97d0..6a7f9cd5a94e 100644
--- a/drivers/infiniband/hw/hfi1/user_pages.c
+++ b/drivers/infiniband/hw/hfi1/user_pages.c
@@ -104,9 +104,11 @@ int hfi1_acquire_user_pages(struct mm_struct *mm, unsigned 
long vaddr, size_t np
bool writable, struct page **pages)
 {
int ret;
+   unsigned int gup_flags = writable ? FOLL_WRITE : 0;
 
-   ret = get_user_pages_fast(vaddr, npages, writable ? FOLL_WRITE : 0,
- pages);
+   gup_flags |= FOLL_LONGTERM;
+
+   ret = get_user_pages_fast(vaddr, npages, gup_flags, pages);
if (ret < 0)
return ret;
 
-- 
2.20.1

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[PATCH V2 7/7] IB/mthca: Use the new FOLL_LONGTERM flag to get_user_pages_fast()

2019-02-13 Thread ira.weiny--- via dri-devel 
From: Ira Weiny 

Use the new FOLL_LONGTERM to get_user_pages_fast() to protect against
FS DAX pages being mapped.

Signed-off-by: Ira Weiny 
---
 drivers/infiniband/hw/mthca/mthca_memfree.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/mthca/mthca_memfree.c 
b/drivers/infiniband/hw/mthca/mthca_memfree.c
index 112d2f38e0de..8ff0e90d7564 100644
--- a/drivers/infiniband/hw/mthca/mthca_memfree.c
+++ b/drivers/infiniband/hw/mthca/mthca_memfree.c
@@ -472,7 +472,8 @@ int mthca_map_user_db(struct mthca_dev *dev, struct 
mthca_uar *uar,
goto out;
}
 
-   ret = get_user_pages_fast(uaddr & PAGE_MASK, 1, FOLL_WRITE, pages);
+   ret = get_user_pages_fast(uaddr & PAGE_MASK, 1,
+ FOLL_WRITE | FOLL_LONGTERM, pages);
if (ret < 0)
goto out;
 
-- 
2.20.1

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[PATCH V2 6/7] IB/qib: Use the new FOLL_LONGTERM flag to get_user_pages_fast()

2019-02-13 Thread ira.weiny--- via dri-devel 
From: Ira Weiny 

Use the new FOLL_LONGTERM to get_user_pages_fast() to protect against
FS DAX pages being mapped.

Signed-off-by: Ira Weiny 
---
 drivers/infiniband/hw/qib/qib_user_sdma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/qib/qib_user_sdma.c 
b/drivers/infiniband/hw/qib/qib_user_sdma.c
index 31c523b2a9f5..b53cc0240e02 100644
--- a/drivers/infiniband/hw/qib/qib_user_sdma.c
+++ b/drivers/infiniband/hw/qib/qib_user_sdma.c
@@ -673,7 +673,7 @@ static int qib_user_sdma_pin_pages(const struct qib_devdata 
*dd,
else
j = npages;
 
-   ret = get_user_pages_fast(addr, j, 0, pages);
+   ret = get_user_pages_fast(addr, j, FOLL_LONGTERM, pages);
if (ret != j) {
i = 0;
j = ret;
-- 
2.20.1

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[PATCH V2 0/7] Add FOLL_LONGTERM to GUP fast and use it

2019-02-13 Thread ira.weiny--- via dri-devel 
From: Ira Weiny 

NOTE: This series depends on my clean up patch to remove the write parameter
from gup_fast_permitted()[1]

HFI1, qib, and mthca, use get_user_pages_fast() due to it performance
advantages.  These pages can be held for a significant time.  But
get_user_pages_fast() does not protect against mapping of FS DAX pages.

Introduce FOLL_LONGTERM and use this flag in get_user_pages_fast() which
retains the performance while also adding the FS DAX checks.  XDP has also
shown interest in using this functionality.[2]

In addition we change get_user_pages() to use the new FOLL_LONGTERM flag and
remove the specialized get_user_pages_longterm call.

[1] https://lkml.org/lkml/2019/2/11/237
[2] https://lkml.org/lkml/2019/2/11/1789

Ira Weiny (7):
  mm/gup: Replace get_user_pages_longterm() with FOLL_LONGTERM
  mm/gup: Change write parameter to flags in fast walk
  mm/gup: Change GUP fast to use flags rather than a write 'bool'
  mm/gup: Add FOLL_LONGTERM capability to GUP fast
  IB/hfi1: Use the new FOLL_LONGTERM flag to get_user_pages_fast()
  IB/qib: Use the new FOLL_LONGTERM flag to get_user_pages_fast()
  IB/mthca: Use the new FOLL_LONGTERM flag to get_user_pages_fast()

 arch/mips/mm/gup.c  |  11 +-
 arch/powerpc/kvm/book3s_64_mmu_hv.c |   4 +-
 arch/powerpc/kvm/e500_mmu.c |   2 +-
 arch/powerpc/mm/mmu_context_iommu.c |   4 +-
 arch/s390/kvm/interrupt.c   |   2 +-
 arch/s390/mm/gup.c  |  12 +-
 arch/sh/mm/gup.c|  11 +-
 arch/sparc/mm/gup.c |   9 +-
 arch/x86/kvm/paging_tmpl.h  |   2 +-
 arch/x86/kvm/svm.c  |   2 +-
 drivers/fpga/dfl-afu-dma-region.c   |   2 +-
 drivers/gpu/drm/via/via_dmablit.c   |   3 +-
 drivers/infiniband/core/umem.c  |   5 +-
 drivers/infiniband/hw/hfi1/user_pages.c |   5 +-
 drivers/infiniband/hw/mthca/mthca_memfree.c |   3 +-
 drivers/infiniband/hw/qib/qib_user_pages.c  |   8 +-
 drivers/infiniband/hw/qib/qib_user_sdma.c   |   2 +-
 drivers/infiniband/hw/usnic/usnic_uiom.c|   9 +-
 drivers/media/v4l2-core/videobuf-dma-sg.c   |   6 +-
 drivers/misc/genwqe/card_utils.c|   2 +-
 drivers/misc/vmw_vmci/vmci_host.c   |   2 +-
 drivers/misc/vmw_vmci/vmci_queue_pair.c |   6 +-
 drivers/platform/goldfish/goldfish_pipe.c   |   3 +-
 drivers/rapidio/devices/rio_mport_cdev.c|   4 +-
 drivers/sbus/char/oradax.c  |   2 +-
 drivers/scsi/st.c   |   3 +-
 drivers/staging/gasket/gasket_page_table.c  |   4 +-
 drivers/tee/tee_shm.c   |   2 +-
 drivers/vfio/vfio_iommu_spapr_tce.c |   3 +-
 drivers/vfio/vfio_iommu_type1.c |   3 +-
 drivers/vhost/vhost.c   |   2 +-
 drivers/video/fbdev/pvr2fb.c|   2 +-
 drivers/virt/fsl_hypervisor.c   |   2 +-
 drivers/xen/gntdev.c|   2 +-
 fs/orangefs/orangefs-bufmap.c   |   2 +-
 include/linux/mm.h  |  17 +-
 kernel/futex.c  |   2 +-
 lib/iov_iter.c  |   7 +-
 mm/gup.c| 220 
 mm/gup_benchmark.c  |   5 +-
 mm/util.c   |   8 +-
 net/ceph/pagevec.c  |   2 +-
 net/rds/info.c  |   2 +-
 net/rds/rdma.c  |   3 +-
 44 files changed, 232 insertions(+), 180 deletions(-)

-- 
2.20.1

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