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Commit 6ed2288c authored by Al Viro's avatar Al Viro
Browse files

vchiq_2835_arm: switch to get_user_pages_fast() 



Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 2bd6bf03

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

+7 −13
Original line number Diff line number Diff line
@@ -92,8 +92,7 @@ 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,
@@ -251,8 +250,7 @@ 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;
@@ -391,8 +389,7 @@ 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;
@@ -472,14 +469,11 @@ 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(

		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,