Merge branch 'work.get_user_pages_fast' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull get_user_pages_fast updates from Al Viro:
 "A bit more get_user_pages work"

* 'work.get_user_pages_fast' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  kvm: switch get_user_page_nowait() to get_user_pages_unlocked()
  __get_user_pages_locked(): get rid of notify_drop argument
  get_user_pages_unlocked(): pass true to __get_user_pages_locked() notify_drop
  cris: switch to get_user_pages_fast()
  fold __get_user_pages_unlocked() into its sole remaining caller

1 files changed, 7 insertions, 16 deletions

diff --git a/arch/cris/arch-v32/drivers/cryptocop.c b/arch/cris/arch-v32/drivers/cryptocop.c
index d688fe117dca..a3c353472a8c 100644
--- a/arch/cris/arch-v32/drivers/cryptocop.c
+++ b/arch/cris/arch-v32/drivers/cryptocop.c
@@ -2717,37 +2717,28 @@ static int cryptocop_ioctl_process(struct inode *inode, struct file *filp, unsig
 		}
 	}
 
-	/* Acquire the mm page semaphore. */
-	down_read(&current->mm->mmap_sem);
-
-	err = get_user_pages((unsigned long int)(oper.indata + prev_ix),
+	err = get_user_pages_fast((unsigned long)(oper.indata + prev_ix),
 			     noinpages,
-			     0,  /* read access only for in data */
-			     inpages,
-			     NULL);
+			     false,  /* read access only for in data */
+			     inpages);
 
 	if (err < 0) {
-		up_read(&current->mm->mmap_sem);
 		nooutpages = noinpages = 0;
 		DEBUG_API(printk("cryptocop_ioctl_process: get_user_pages indata\n"));
 		goto error_cleanup;
 	}
 	noinpages = err;
-	if (oper.do_cipher){
-		err = get_user_pages((unsigned long int)oper.cipher_outdata,
+	if (oper.do_cipher) {
+		err = get_user_pages_fast((unsigned long)oper.cipher_outdata,
 				     nooutpages,
-				     FOLL_WRITE, /* write access for out data */
-				     outpages,
-				     NULL);
-		up_read(&current->mm->mmap_sem);
+				     true, /* write access for out data */
+				     outpages);
 		if (err < 0) {
 			nooutpages = 0;
 			DEBUG_API(printk("cryptocop_ioctl_process: get_user_pages outdata\n"));
 			goto error_cleanup;
 		}
 		nooutpages = err;
-	} else {
-		up_read(&current->mm->mmap_sem);
 	}
 
 	/* Add 6 to nooutpages to make room for possibly inserted buffers for storing digest and