diff options
| author | Lorenzo Stoakes <lstoakes@gmail.com> | 2017-05-09 00:55:02 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-09 02:15:10 +0200 |
| commit | 3d88936f35bc67f7bee2efd4eec69baf26c17a5a (patch) | |
| tree | 3b357c6495beba83d7a311d04ed97e9eca46e89b /drivers/virt/fsl_hypervisor.c | |
| parent | proc/sysctl: fix the int overflow for jiffies conversion (diff) | |
| download | linux-3d88936f35bc67f7bee2efd4eec69baf26c17a5a.tar.xz linux-3d88936f35bc67f7bee2efd4eec69baf26c17a5a.zip | |
drivers/virt/fsl_hypervisor.c: use get_user_pages_unlocked()
Moving from get_user_pages() to get_user_pages_unlocked() simplifies the
code and takes advantage of VM_FAULT_RETRY functionality when faulting
in pages.
Link: http://lkml.kernel.org/r/20161101194332.23961-1-lstoakes@gmail.com
Signed-off-by: Lorenzo Stoakes <lstoakes@gmail.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Mihai Caraman <mihai.caraman@freescale.com>
Cc: Greg KH <gregkh@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/virt/fsl_hypervisor.c')
| -rw-r--r-- | drivers/virt/fsl_hypervisor.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/drivers/virt/fsl_hypervisor.c b/drivers/virt/fsl_hypervisor.c index 150ce2abf6c8..d3eca879a0a8 100644 --- a/drivers/virt/fsl_hypervisor.c +++ b/drivers/virt/fsl_hypervisor.c @@ -243,11 +243,8 @@ static long ioctl_memcpy(struct fsl_hv_ioctl_memcpy __user *p) sg_list = PTR_ALIGN(sg_list_unaligned, sizeof(struct fh_sg_list)); /* Get the physical addresses of the source buffer */ - down_read(¤t->mm->mmap_sem); - num_pinned = get_user_pages(param.local_vaddr - lb_offset, - num_pages, (param.source == -1) ? 0 : FOLL_WRITE, - pages, NULL); - up_read(¤t->mm->mmap_sem); + num_pinned = get_user_pages_unlocked(param.local_vaddr - lb_offset, + num_pages, pages, (param.source == -1) ? 0 : FOLL_WRITE); if (num_pinned != num_pages) { /* get_user_pages() failed */ |