---

yaml
---
r: 336197
b: refs/heads/master
c: ab73857
h: refs/heads/master
i:
  336195: 87c82d1
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 1e8b33328a5407b447ff80953655a47014a6dcb9
+refs/heads/master: ab73857e354ab9e317613cba7db714e2c12c6547

trunk/fs/direct-io.c

@@ -540,6 +540,7 @@ static int get_more_blocks(struct dio *dio, struct dio_submit *sdio,
 	sector_t fs_endblk;	/* Into file, in filesystem-sized blocks */
 	unsigned long fs_count;	/* Number of filesystem-sized blocks */
 	int create;
+	unsigned int i_blkbits = sdio->blkbits + sdio->blkfactor;
 
 	/*
 	 * If there was a memory error and we've overwritten all the
@@ -554,7 +555,7 @@ static int get_more_blocks(struct dio *dio, struct dio_submit *sdio,
 		fs_count = fs_endblk - fs_startblk + 1;
 
 		map_bh->b_state = 0;
-		map_bh->b_size = fs_count << dio->inode->i_blkbits;
+		map_bh->b_size = fs_count << i_blkbits;
 
 		/*
 		 * For writes inside i_size on a DIO_SKIP_HOLES filesystem we
@@ -1053,7 +1054,8 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
 	int seg;
 	size_t size;
 	unsigned long addr;
-	unsigned blkbits = inode->i_blkbits;
+	unsigned i_blkbits = ACCESS_ONCE(inode->i_blkbits);
+	unsigned blkbits = i_blkbits;
 	unsigned blocksize_mask = (1 << blkbits) - 1;
 	ssize_t retval = -EINVAL;
 	loff_t end = offset;
@@ -1149,7 +1151,7 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
 	dio->inode = inode;
 	dio->rw = rw;
 	sdio.blkbits = blkbits;
-	sdio.blkfactor = inode->i_blkbits - blkbits;
+	sdio.blkfactor = i_blkbits - blkbits;
 	sdio.block_in_file = offset >> blkbits;
 
 	sdio.get_block = get_block;