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vchiq_2835_arm: switch to get_user_pages_fast()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2017-01-30 22:28:31 -05:00
parent 2bd6bf03f4
commit 6ed2288ca9
1 changed files with 7 additions and 13 deletions
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drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
+7 -13
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@@ -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(
(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,