Merge branch 'work.get_user_pages_fast' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull get_user_pages_fast() conversion from Al Viro:
 "A bunch of places switched to get_user_pages_fast()"

* 'work.get_user_pages_fast' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  ceph: use get_user_pages_fast()
  pvr2fs: use get_user_pages_fast()
  atomisp: use get_user_pages_fast()
  st: use get_user_pages_fast()
  via_dmablit(): use get_user_pages_fast()
  fsl_hypervisor: switch to get_user_pages_fast()
  rapidio: switch to get_user_pages_fast()
  vchiq_2835_arm: switch to get_user_pages_fast()

drivers/gpu/drm/via/via_dmablit.c

@@ -238,9 +238,9 @@ via_lock_all_dma_pages(drm_via_sg_info_t *vsg,  drm_via_dmablit_t *xfer)
 	vsg->pages = vzalloc(sizeof(struct page *) * vsg->num_pages);
 	if (NULL == vsg->pages)
 		return -ENOMEM;
-	ret = get_user_pages_unlocked((unsigned long)xfer->mem_addr,
-			vsg->num_pages, vsg->pages,
-			(vsg->direction == DMA_FROM_DEVICE) ? FOLL_WRITE : 0);
+	ret = get_user_pages_fast((unsigned long)xfer->mem_addr,
+			vsg->num_pages, vsg->direction == DMA_FROM_DEVICE,
+			vsg->pages);
 	if (ret != vsg->num_pages) {
 		if (ret < 0)
 			return ret;

drivers/rapidio/devices/rio_mport_cdev.c

@@ -889,11 +889,9 @@ rio_dma_transfer(struct file *filp, u32 transfer_mode,
 			goto err_req;
 		}
 
-		pinned = get_user_pages_unlocked(
+		pinned = get_user_pages_fast(
 				(unsigned long)xfer->loc_addr & PAGE_MASK,
-				nr_pages,
-				page_list,
-				dir == DMA_FROM_DEVICE ? FOLL_WRITE : 0);
+				nr_pages, dir == DMA_FROM_DEVICE, page_list);
 
 		if (pinned != nr_pages) {
 			if (pinned < 0) {

drivers/scsi/st.c

@@ -4920,11 +4920,7 @@ static int sgl_map_user_pages(struct st_buffer *STbp,
 
         /* Try to fault in all of the necessary pages */
         /* rw==READ means read from drive, write into memory area */
-	res = get_user_pages_unlocked(
-		uaddr,
-		nr_pages,
-		pages,
-		rw == READ ? FOLL_WRITE : 0); /* don't force */
+	res = get_user_pages_fast(uaddr, nr_pages, rw == READ, pages);
 
 	/* Errors and no page mapped should return here */
 	if (res < nr_pages)

drivers/staging/media/atomisp/pci/atomisp2/hmm/hmm_bo.c

@@ -1020,10 +1020,8 @@ static int alloc_user_pages(struct hmm_buffer_object *bo,
 	} else {
 		/*Handle frame buffer allocated in user space*/
 		mutex_unlock(&bo->mutex);
-		down_read(&current->mm->mmap_sem);
-		page_nr = get_user_pages((unsigned long)userptr,
-					 (int)(bo->pgnr), 1, pages, NULL);
-		up_read(&current->mm->mmap_sem);
+		page_nr = get_user_pages_fast((unsigned long)userptr,
+					 (int)(bo->pgnr), 1, pages);
 		mutex_lock(&bo->mutex);
 		bo->mem_type = HMM_BO_MEM_TYPE_USER;
 	}

drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c

@@ -90,8 +90,7 @@ static irqreturn_t
 vchiq_doorbell_irq(int irq, void *dev_id);
 
 static struct vchiq_pagelist_info *
-create_pagelist(char __user *buf, size_t count, unsigned short type,
-		struct task_struct *task);
+create_pagelist(char __user *buf, size_t count, unsigned short type);
 
 static void
 free_pagelist(struct vchiq_pagelist_info *pagelistinfo,
@@ -255,8 +254,7 @@ vchiq_prepare_bulk_data(VCHIQ_BULK_T *bulk, VCHI_MEM_HANDLE_T memhandle,
 	pagelistinfo = create_pagelist((char __user *)offset, size,
 				       (dir == VCHIQ_BULK_RECEIVE)
 				       ? PAGELIST_READ
-				       : PAGELIST_WRITE,
-				       current);
+				       : PAGELIST_WRITE);
 
 	if (!pagelistinfo)
 		return VCHIQ_ERROR;
@@ -395,8 +393,7 @@ cleanup_pagelistinfo(struct vchiq_pagelist_info *pagelistinfo)
  */
 
 static struct vchiq_pagelist_info *
-create_pagelist(char __user *buf, size_t count, unsigned short type,
-		struct task_struct *task)
+create_pagelist(char __user *buf, size_t count, unsigned short type)
 {
 	PAGELIST_T *pagelist;
 	struct vchiq_pagelist_info *pagelistinfo;
@@ -476,14 +473,11 @@ create_pagelist(char __user *buf, size_t count, unsigned short type,
 		}
 		/* do not try and release vmalloc pages */
 	} else {
-		down_read(&task->mm->mmap_sem);
-		actual_pages = get_user_pages(
-					  (unsigned long)buf & PAGE_MASK,
+		actual_pages = get_user_pages_fast(
+				          (unsigned long)buf & PAGE_MASK,
 					  num_pages,
-					  (type == PAGELIST_READ) ? FOLL_WRITE : 0,
-					  pages,
-					  NULL /*vmas */);
-		up_read(&task->mm->mmap_sem);
+					  type == PAGELIST_READ,
+					  pages);
 
 		if (actual_pages != num_pages) {
 			vchiq_log_info(vchiq_arm_log_level,

drivers/video/fbdev/pvr2fb.c

@@ -686,9 +686,7 @@ static ssize_t pvr2fb_write(struct fb_info *info, const char *buf,
 	if (!pages)
 		return -ENOMEM;
 
-	ret = get_user_pages_unlocked((unsigned long)buf, nr_pages, pages,
-			FOLL_WRITE);
-
+	ret = get_user_pages_fast((unsigned long)buf, nr_pages, true, pages);
 	if (ret < nr_pages) {
 		nr_pages = ret;
 		ret = -EINVAL;

drivers/virt/fsl_hypervisor.c

@@ -243,8 +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 */
-	num_pinned = get_user_pages_unlocked(param.local_vaddr - lb_offset,
-		num_pages, pages, (param.source == -1) ? 0 : FOLL_WRITE);
+	num_pinned = get_user_pages_fast(param.local_vaddr - lb_offset,
+		num_pages, param.source != -1, pages);
 
 	if (num_pinned != num_pages) {
 		/* get_user_pages() failed */

net/ceph/pagevec.c

@@ -25,9 +25,9 @@ struct page **ceph_get_direct_page_vector(const void __user *data,
 		return ERR_PTR(-ENOMEM);
 
 	while (got < num_pages) {
-		rc = get_user_pages_unlocked(
+		rc = get_user_pages_fast(
 		    (unsigned long)data + ((unsigned long)got * PAGE_SIZE),
-		    num_pages - got, pages + got, write_page ? FOLL_WRITE : 0);
+		    num_pages - got, write_page, pages + got);
 		if (rc < 0)
 			break;
 		BUG_ON(rc == 0);