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

drivers/platform/goldfish/goldfish_pipe.c

+2 −4
Original line number Diff line number Diff line
@@ -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

		 * much memory to the process.

		 */

		down_read(&current->mm->mmap_sem);

		ret = get_user_pages(address, 1, is_write ? 0 : FOLL_WRITE,

				&page, NULL);

		up_read(&current->mm->mmap_sem);

		ret = get_user_pages_unlocked(address, 1, &page,

				is_write ? 0 : FOLL_WRITE);

		if (ret < 0)

			break;