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()

2 files changed, 9 insertions, 17 deletions

diff --git a/drivers/staging/media/atomisp/pci/atomisp2/hmm/hmm_bo.c b/drivers/staging/media/atomisp/pci/atomisp2/hmm/hmm_bo.c
index 6e2dce7a5a2d..79bd540d7882 100644
--- a/drivers/staging/media/atomisp/pci/atomisp2/hmm/hmm_bo.c
+++ b/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;
 	}
diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
index eea2d78b0ec6..315b49c1de3b 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
+++ b/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,