Merge branches 'clockevents/4.4-fixes' and 'clockevents/4.5-fixes' of http://git.linaro.org/people/daniel.lezcano/linux into timers/urgent

Pull in fixes from Daniel Lezcano:

 - Fix the vt8500 timer leading to a system lock up when dealing with too
   small delta (Roman Volkov)

 - Select the CLKSRC_MMIO when the fsl_ftm_timer is enabled with COMPILE_TEST
   (Daniel Lezcano)

 - Prevent to compile timers using the 'iomem' API when the architecture has
   not HAS_IOMEM set (Richard Weinberger)

1 files changed, 10 insertions, 1 deletions

diff --git a/fs/direct-io.c b/fs/direct-io.c
index cb5337d8c273..602e8441bc0f 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -1169,6 +1169,16 @@ do_blockdev_direct_IO(struct kiocb *iocb, struct inode *inode,
                 }
         }
 
+        /* Once we sampled i_size check for reads beyond EOF */
+        dio->i_size = i_size_read(inode);
+        if (iov_iter_rw(iter) == READ && offset >= dio->i_size) {
+                if (dio->flags & DIO_LOCKING)
+                        mutex_unlock(&inode->i_mutex);
+                kmem_cache_free(dio_cache, dio);
+                retval = 0;
+                goto out;
+        }
+
         /*
          * For file extending writes updating i_size before data writeouts
          * complete can expose uninitialized blocks in dumb filesystems.
@@ -1222,7 +1232,6 @@ do_blockdev_direct_IO(struct kiocb *iocb, struct inode *inode,
         sdio.next_block_for_io = -1;
 
         dio->iocb = iocb;
-        dio->i_size = i_size_read(inode);
 
         spin_lock_init(&dio->bio_lock);
         dio->refcount = 1;