Commit 052662ca authored by Lorenzo Stoakes's avatar Lorenzo Stoakes Committed by Greg Kroah-Hartman

platform: goldfish: pipe: 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.
Signed-off-by: default avatarLorenzo Stoakes <lstoakes@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 9d59c6e8
...@@ -308,10 +308,8 @@ static ssize_t goldfish_pipe_read_write(struct file *filp, char __user *buffer, ...@@ -308,10 +308,8 @@ static ssize_t goldfish_pipe_read_write(struct file *filp, char __user *buffer,
* returns a small amount, then there's no need to pin that * returns a small amount, then there's no need to pin that
* much memory to the process. * much memory to the process.
*/ */
down_read(&current->mm->mmap_sem); ret = get_user_pages_unlocked(address, 1, &page,
ret = get_user_pages(address, 1, is_write ? 0 : FOLL_WRITE, is_write ? 0 : FOLL_WRITE);
&page, NULL);
up_read(&current->mm->mmap_sem);
if (ret < 0) if (ret < 0)
break; break;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment