From 17f8c842d24ac054e4212c82b5bd6ae455a334f3 Mon Sep 17 00:00:00 2001
From: Omar Sandoval <osandov@osandov.com>
Date: Mon, 16 Mar 2015 04:33:50 -0700
Subject: Remove rw from {,__,do_}blockdev_direct_IO()

Most filesystems call through to these at some point, so we'll start
here.

Signed-off-by: Omar Sandoval <osandov@osandov.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 fs/ext2/inode.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'fs/ext2')

diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index df9d6afbc5d5..3cbeb1b63acf 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -864,7 +864,7 @@ ext2_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
 		ret = dax_do_io(rw, iocb, inode, iter, offset, ext2_get_block,
 				NULL, DIO_LOCKING);
 	else
-		ret = blockdev_direct_IO(rw, iocb, inode, iter, offset,
+		ret = blockdev_direct_IO(iocb, inode, iter, offset,
 					 ext2_get_block);
 	if (ret < 0 && (rw & WRITE))
 		ext2_write_failed(mapping, offset + count);
-- 
cgit v1.2.3


From a95cd6311512bd954e88684eb39373f7f4b0a984 Mon Sep 17 00:00:00 2001
From: Omar Sandoval <osandov@osandov.com>
Date: Mon, 16 Mar 2015 04:33:51 -0700
Subject: Remove rw from dax_{do_,}io()

And use iov_iter_rw() instead.

Signed-off-by: Omar Sandoval <osandov@osandov.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 fs/dax.c           | 27 +++++++++++++--------------
 fs/ext2/inode.c    |  4 ++--
 fs/ext4/indirect.c |  4 ++--
 fs/ext4/inode.c    |  2 +-
 include/linux/fs.h |  4 ++--
 5 files changed, 20 insertions(+), 21 deletions(-)

(limited to 'fs/ext2')

diff --git a/fs/dax.c b/fs/dax.c
index ed1619ec6537..a27846946525 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -98,9 +98,9 @@ static bool buffer_size_valid(struct buffer_head *bh)
 	return bh->b_state != 0;
 }
 
-static ssize_t dax_io(int rw, struct inode *inode, struct iov_iter *iter,
-			loff_t start, loff_t end, get_block_t get_block,
-			struct buffer_head *bh)
+static ssize_t dax_io(struct inode *inode, struct iov_iter *iter,
+		      loff_t start, loff_t end, get_block_t get_block,
+		      struct buffer_head *bh)
 {
 	ssize_t retval = 0;
 	loff_t pos = start;
@@ -109,7 +109,7 @@ static ssize_t dax_io(int rw, struct inode *inode, struct iov_iter *iter,
 	void *addr;
 	bool hole = false;
 
-	if (rw != WRITE)
+	if (iov_iter_rw(iter) != WRITE)
 		end = min(end, i_size_read(inode));
 
 	while (pos < end) {
@@ -124,7 +124,7 @@ static ssize_t dax_io(int rw, struct inode *inode, struct iov_iter *iter,
 				bh->b_size = PAGE_ALIGN(end - pos);
 				bh->b_state = 0;
 				retval = get_block(inode, block, bh,
-								rw == WRITE);
+						   iov_iter_rw(iter) == WRITE);
 				if (retval)
 					break;
 				if (!buffer_size_valid(bh))
@@ -137,7 +137,7 @@ static ssize_t dax_io(int rw, struct inode *inode, struct iov_iter *iter,
 				bh->b_size -= done;
 			}
 
-			hole = (rw != WRITE) && !buffer_written(bh);
+			hole = iov_iter_rw(iter) != WRITE && !buffer_written(bh);
 			if (hole) {
 				addr = NULL;
 				size = bh->b_size - first;
@@ -154,7 +154,7 @@ static ssize_t dax_io(int rw, struct inode *inode, struct iov_iter *iter,
 			max = min(pos + size, end);
 		}
 
-		if (rw == WRITE)
+		if (iov_iter_rw(iter) == WRITE)
 			len = copy_from_iter(addr, max - pos, iter);
 		else if (!hole)
 			len = copy_to_iter(addr, max - pos, iter);
@@ -173,7 +173,6 @@ static ssize_t dax_io(int rw, struct inode *inode, struct iov_iter *iter,
 
 /**
  * dax_do_io - Perform I/O to a DAX file
- * @rw: READ to read or WRITE to write
  * @iocb: The control block for this I/O
  * @inode: The file which the I/O is directed at
  * @iter: The addresses to do I/O from or to
@@ -189,9 +188,9 @@ static ssize_t dax_io(int rw, struct inode *inode, struct iov_iter *iter,
  * As with do_blockdev_direct_IO(), we increment i_dio_count while the I/O
  * is in progress.
  */
-ssize_t dax_do_io(int rw, struct kiocb *iocb, struct inode *inode,
-			struct iov_iter *iter, loff_t pos,
-			get_block_t get_block, dio_iodone_t end_io, int flags)
+ssize_t dax_do_io(struct kiocb *iocb, struct inode *inode,
+		  struct iov_iter *iter, loff_t pos, get_block_t get_block,
+		  dio_iodone_t end_io, int flags)
 {
 	struct buffer_head bh;
 	ssize_t retval = -EINVAL;
@@ -199,7 +198,7 @@ ssize_t dax_do_io(int rw, struct kiocb *iocb, struct inode *inode,
 
 	memset(&bh, 0, sizeof(bh));
 
-	if ((flags & DIO_LOCKING) && (rw == READ)) {
+	if ((flags & DIO_LOCKING) && iov_iter_rw(iter) == READ) {
 		struct address_space *mapping = inode->i_mapping;
 		mutex_lock(&inode->i_mutex);
 		retval = filemap_write_and_wait_range(mapping, pos, end - 1);
@@ -212,9 +211,9 @@ ssize_t dax_do_io(int rw, struct kiocb *iocb, struct inode *inode,
 	/* Protects against truncate */
 	atomic_inc(&inode->i_dio_count);
 
-	retval = dax_io(rw, inode, iter, pos, end, get_block, &bh);
+	retval = dax_io(inode, iter, pos, end, get_block, &bh);
 
-	if ((flags & DIO_LOCKING) && (rw == READ))
+	if ((flags & DIO_LOCKING) && iov_iter_rw(iter) == READ)
 		mutex_unlock(&inode->i_mutex);
 
 	if ((retval > 0) && end_io)
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index 3cbeb1b63acf..14e8d1752685 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -861,8 +861,8 @@ ext2_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
 	ssize_t ret;
 
 	if (IS_DAX(inode))
-		ret = dax_do_io(rw, iocb, inode, iter, offset, ext2_get_block,
-				NULL, DIO_LOCKING);
+		ret = dax_do_io(iocb, inode, iter, offset, ext2_get_block, NULL,
+				DIO_LOCKING);
 	else
 		ret = blockdev_direct_IO(iocb, inode, iter, offset,
 					 ext2_get_block);
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index ae4ffc27abc6..cd81d01da0b0 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -690,7 +690,7 @@ retry:
 			goto locked;
 		}
 		if (IS_DAX(inode))
-			ret = dax_do_io(rw, iocb, inode, iter, offset,
+			ret = dax_do_io(iocb, inode, iter, offset,
 					ext4_get_block, NULL, 0);
 		else
 			ret = __blockdev_direct_IO(iocb, inode,
@@ -701,7 +701,7 @@ retry:
 	} else {
 locked:
 		if (IS_DAX(inode))
-			ret = dax_do_io(rw, iocb, inode, iter, offset,
+			ret = dax_do_io(iocb, inode, iter, offset,
 					ext4_get_block, NULL, DIO_LOCKING);
 		else
 			ret = blockdev_direct_IO(iocb, inode, iter, offset,
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index ec049c04b197..76b8cba5d041 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3034,7 +3034,7 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb,
 		dio_flags = DIO_LOCKING;
 	}
 	if (IS_DAX(inode))
-		ret = dax_do_io(rw, iocb, inode, iter, offset, get_block_func,
+		ret = dax_do_io(iocb, inode, iter, offset, get_block_func,
 				ext4_end_io_dio, dio_flags);
 	else
 		ret = __blockdev_direct_IO(iocb, inode,
diff --git a/include/linux/fs.h b/include/linux/fs.h
index c67b6de8be33..295bc589fe1b 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2609,8 +2609,8 @@ extern loff_t fixed_size_llseek(struct file *file, loff_t offset,
 extern int generic_file_open(struct inode * inode, struct file * filp);
 extern int nonseekable_open(struct inode * inode, struct file * filp);
 
-ssize_t dax_do_io(int rw, struct kiocb *, struct inode *, struct iov_iter *,
-		loff_t, get_block_t, dio_iodone_t, int flags);
+ssize_t dax_do_io(struct kiocb *, struct inode *, struct iov_iter *, loff_t,
+		  get_block_t, dio_iodone_t, int flags);
 int dax_clear_blocks(struct inode *, sector_t block, long size);
 int dax_zero_page_range(struct inode *, loff_t from, unsigned len, get_block_t);
 int dax_truncate_page(struct inode *, loff_t from, get_block_t);
-- 
cgit v1.2.3


From 6f67376318abea58589ebe6d69dffeabb6f6c26a Mon Sep 17 00:00:00 2001
From: Omar Sandoval <osandov@osandov.com>
Date: Mon, 16 Mar 2015 04:33:52 -0700
Subject: direct_IO: use iov_iter_rw() instead of rw everywhere

The rw parameter to direct_IO is redundant with iov_iter->type, and
treated slightly differently just about everywhere it's used: some users
do rw & WRITE, and others do rw == WRITE where they should be doing a
bitwise check. Simplify this with the new iov_iter_rw() helper, which
always returns either READ or WRITE.

Signed-off-by: Omar Sandoval <osandov@osandov.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 drivers/staging/lustre/lustre/llite/rw26.c | 18 +++++++++---------
 fs/9p/vfs_addr.c                           |  2 +-
 fs/affs/file.c                             |  4 ++--
 fs/btrfs/inode.c                           | 10 +++++-----
 fs/ext2/inode.c                            |  2 +-
 fs/ext3/inode.c                            |  8 ++++----
 fs/ext4/ext4.h                             |  4 ++--
 fs/ext4/indirect.c                         | 10 +++++-----
 fs/ext4/inode.c                            | 20 ++++++++++----------
 fs/f2fs/data.c                             | 16 ++++++++--------
 fs/fat/inode.c                             |  4 ++--
 fs/fuse/file.c                             | 13 +++++++------
 fs/gfs2/aops.c                             |  7 +++----
 fs/hfs/inode.c                             |  2 +-
 fs/hfsplus/inode.c                         |  2 +-
 fs/jfs/inode.c                             |  2 +-
 fs/nfs/direct.c                            |  2 +-
 fs/nilfs2/inode.c                          |  4 ++--
 fs/ocfs2/aops.c                            |  2 +-
 fs/reiserfs/inode.c                        |  2 +-
 fs/udf/inode.c                             |  2 +-
 fs/xfs/xfs_aops.c                          |  2 +-
 22 files changed, 69 insertions(+), 69 deletions(-)

(limited to 'fs/ext2')

diff --git a/drivers/staging/lustre/lustre/llite/rw26.c b/drivers/staging/lustre/lustre/llite/rw26.c
index 2f21304046aa..3aa9de6bcc40 100644
--- a/drivers/staging/lustre/lustre/llite/rw26.c
+++ b/drivers/staging/lustre/lustre/llite/rw26.c
@@ -399,7 +399,7 @@ static ssize_t ll_direct_IO_26(int rw, struct kiocb *iocb,
 	 *    size changing by concurrent truncates and writes.
 	 * 1. Need inode mutex to operate transient pages.
 	 */
-	if (rw == READ)
+	if (iov_iter_rw(iter) == READ)
 		mutex_lock(&inode->i_mutex);
 
 	LASSERT(obj->cob_transient_pages == 0);
@@ -408,7 +408,7 @@ static ssize_t ll_direct_IO_26(int rw, struct kiocb *iocb,
 		size_t offs;
 
 		count = min_t(size_t, iov_iter_count(iter), size);
-		if (rw == READ) {
+		if (iov_iter_rw(iter) == READ) {
 			if (file_offset >= i_size_read(inode))
 				break;
 			if (file_offset + count > i_size_read(inode))
@@ -418,11 +418,11 @@ static ssize_t ll_direct_IO_26(int rw, struct kiocb *iocb,
 		result = iov_iter_get_pages_alloc(iter, &pages, count, &offs);
 		if (likely(result > 0)) {
 			int n = DIV_ROUND_UP(result + offs, PAGE_SIZE);
-			result = ll_direct_IO_26_seg(env, io, rw, inode,
-						     file->f_mapping,
-						     result, file_offset,
-						     pages, n);
-			ll_free_user_pages(pages, n, rw==READ);
+			result = ll_direct_IO_26_seg(env, io, iov_iter_rw(iter),
+						     inode, file->f_mapping,
+						     result, file_offset, pages,
+						     n);
+			ll_free_user_pages(pages, n, iov_iter_rw(iter) == READ);
 		}
 		if (unlikely(result <= 0)) {
 			/* If we can't allocate a large enough buffer
@@ -449,11 +449,11 @@ static ssize_t ll_direct_IO_26(int rw, struct kiocb *iocb,
 	}
 out:
 	LASSERT(obj->cob_transient_pages == 0);
-	if (rw == READ)
+	if (iov_iter_rw(iter) == READ)
 		mutex_unlock(&inode->i_mutex);
 
 	if (tot_bytes > 0) {
-		if (rw == WRITE) {
+		if (iov_iter_rw(iter) == WRITE) {
 			struct lov_stripe_md *lsm;
 
 			lsm = ccc_inode_lsm_get(inode);
diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c
index 2e38f9a5b472..dd5543b1d183 100644
--- a/fs/9p/vfs_addr.c
+++ b/fs/9p/vfs_addr.c
@@ -253,7 +253,7 @@ v9fs_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter, loff_t pos)
 	struct file *file = iocb->ki_filp;
 	ssize_t n;
 	int err = 0;
-	if (rw & WRITE) {
+	if (iov_iter_rw(iter) == WRITE) {
 		n = p9_client_write(file->private_data, pos, iter, &err);
 		if (n) {
 			struct inode *inode = file_inode(file);
diff --git a/fs/affs/file.c b/fs/affs/file.c
index 1edc0d4b40db..7f05a468d594 100644
--- a/fs/affs/file.c
+++ b/fs/affs/file.c
@@ -398,7 +398,7 @@ affs_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
 	size_t count = iov_iter_count(iter);
 	ssize_t ret;
 
-	if (rw == WRITE) {
+	if (iov_iter_rw(iter) == WRITE) {
 		loff_t size = offset + count;
 
 		if (AFFS_I(inode)->mmu_private < size)
@@ -406,7 +406,7 @@ affs_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
 	}
 
 	ret = blockdev_direct_IO(iocb, inode, iter, offset, affs_get_block);
-	if (ret < 0 && (rw & WRITE))
+	if (ret < 0 && iov_iter_rw(iter) == WRITE)
 		affs_write_failed(mapping, offset + count);
 	return ret;
 }
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index e9a3ff8a85fd..ca69e83d4f3c 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -8081,7 +8081,7 @@ free_ordered:
 	bio_endio(dio_bio, ret);
 }
 
-static ssize_t check_direct_IO(struct btrfs_root *root, int rw, struct kiocb *iocb,
+static ssize_t check_direct_IO(struct btrfs_root *root, struct kiocb *iocb,
 			const struct iov_iter *iter, loff_t offset)
 {
 	int seg;
@@ -8096,7 +8096,7 @@ static ssize_t check_direct_IO(struct btrfs_root *root, int rw, struct kiocb *io
 		goto out;
 
 	/* If this is a write we don't need to check anymore */
-	if (rw & WRITE)
+	if (iov_iter_rw(iter) == WRITE)
 		return 0;
 	/*
 	 * Check to make sure we don't have duplicate iov_base's in this
@@ -8126,7 +8126,7 @@ static ssize_t btrfs_direct_IO(int rw, struct kiocb *iocb,
 	bool relock = false;
 	ssize_t ret;
 
-	if (check_direct_IO(BTRFS_I(inode)->root, rw, iocb, iter, offset))
+	if (check_direct_IO(BTRFS_I(inode)->root, iocb, iter, offset))
 		return 0;
 
 	atomic_inc(&inode->i_dio_count);
@@ -8144,7 +8144,7 @@ static ssize_t btrfs_direct_IO(int rw, struct kiocb *iocb,
 		filemap_fdatawrite_range(inode->i_mapping, offset,
 					 offset + count - 1);
 
-	if (rw & WRITE) {
+	if (iov_iter_rw(iter) == WRITE) {
 		/*
 		 * If the write DIO is beyond the EOF, we need update
 		 * the isize, but it is protected by i_mutex. So we can
@@ -8178,7 +8178,7 @@ static ssize_t btrfs_direct_IO(int rw, struct kiocb *iocb,
 				   BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev,
 				   iter, offset, btrfs_get_blocks_direct, NULL,
 				   btrfs_submit_direct, flags);
-	if (rw & WRITE) {
+	if (iov_iter_rw(iter) == WRITE) {
 		current->journal_info = NULL;
 		if (ret < 0 && ret != -EIOCBQUEUED)
 			btrfs_delalloc_release_space(inode, count);
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index 14e8d1752685..685e514c57dd 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -866,7 +866,7 @@ ext2_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
 	else
 		ret = blockdev_direct_IO(iocb, inode, iter, offset,
 					 ext2_get_block);
-	if (ret < 0 && (rw & WRITE))
+	if (ret < 0 && iov_iter_rw(iter) == WRITE)
 		ext2_write_failed(mapping, offset + count);
 	return ret;
 }
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index 6fb376c8d938..c70839d26ccd 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -1832,9 +1832,9 @@ static ssize_t ext3_direct_IO(int rw, struct kiocb *iocb,
 	size_t count = iov_iter_count(iter);
 	int retries = 0;
 
-	trace_ext3_direct_IO_enter(inode, offset, count, rw);
+	trace_ext3_direct_IO_enter(inode, offset, count, iov_iter_rw(iter));
 
-	if (rw == WRITE) {
+	if (iov_iter_rw(iter) == WRITE) {
 		loff_t final_size = offset + count;
 
 		if (final_size > inode->i_size) {
@@ -1861,7 +1861,7 @@ retry:
 	 * In case of error extending write may have instantiated a few
 	 * blocks outside i_size. Trim these off again.
 	 */
-	if (unlikely((rw & WRITE) && ret < 0)) {
+	if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) {
 		loff_t isize = i_size_read(inode);
 		loff_t end = offset + count;
 
@@ -1908,7 +1908,7 @@ retry:
 			ret = err;
 	}
 out:
-	trace_ext3_direct_IO_exit(inode, offset, count, rw, ret);
+	trace_ext3_direct_IO_exit(inode, offset, count, iov_iter_rw(iter), ret);
 	return ret;
 }
 
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index f63c3d5805c4..2031c994024e 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -2152,8 +2152,8 @@ extern void ext4_da_update_reserve_space(struct inode *inode,
 /* indirect.c */
 extern int ext4_ind_map_blocks(handle_t *handle, struct inode *inode,
 				struct ext4_map_blocks *map, int flags);
-extern ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb,
-				struct iov_iter *iter, loff_t offset);
+extern ssize_t ext4_ind_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
+				  loff_t offset);
 extern int ext4_ind_calc_metadata_amount(struct inode *inode, sector_t lblock);
 extern int ext4_ind_trans_blocks(struct inode *inode, int nrblocks);
 extern void ext4_ind_truncate(handle_t *, struct inode *inode);
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index cd81d01da0b0..3580629e42d3 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -642,8 +642,8 @@ out:
  * crashes then stale disk data _may_ be exposed inside the file. But current
  * VFS code falls back into buffered path in that case so we are safe.
  */
-ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb,
-			   struct iov_iter *iter, loff_t offset)
+ssize_t ext4_ind_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
+			   loff_t offset)
 {
 	struct file *file = iocb->ki_filp;
 	struct inode *inode = file->f_mapping->host;
@@ -654,7 +654,7 @@ ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb,
 	size_t count = iov_iter_count(iter);
 	int retries = 0;
 
-	if (rw == WRITE) {
+	if (iov_iter_rw(iter) == WRITE) {
 		loff_t final_size = offset + count;
 
 		if (final_size > inode->i_size) {
@@ -676,7 +676,7 @@ ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb,
 	}
 
 retry:
-	if (rw == READ && ext4_should_dioread_nolock(inode)) {
+	if (iov_iter_rw(iter) == READ && ext4_should_dioread_nolock(inode)) {
 		/*
 		 * Nolock dioread optimization may be dynamically disabled
 		 * via ext4_inode_block_unlocked_dio(). Check inode's state
@@ -707,7 +707,7 @@ locked:
 			ret = blockdev_direct_IO(iocb, inode, iter, offset,
 						 ext4_get_block);
 
-		if (unlikely((rw & WRITE) && ret < 0)) {
+		if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) {
 			loff_t isize = i_size_read(inode);
 			loff_t end = offset + count;
 
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 76b8cba5d041..cf6ba6536035 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2952,8 +2952,8 @@ static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset,
  * if the machine crashes during the write.
  *
  */
-static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb,
-			      struct iov_iter *iter, loff_t offset)
+static ssize_t ext4_ext_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
+				  loff_t offset)
 {
 	struct file *file = iocb->ki_filp;
 	struct inode *inode = file->f_mapping->host;
@@ -2966,8 +2966,8 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb,
 	ext4_io_end_t *io_end = NULL;
 
 	/* Use the old path for reads and writes beyond i_size. */
-	if (rw != WRITE || final_size > inode->i_size)
-		return ext4_ind_direct_IO(rw, iocb, iter, offset);
+	if (iov_iter_rw(iter) != WRITE || final_size > inode->i_size)
+		return ext4_ind_direct_IO(iocb, iter, offset);
 
 	BUG_ON(iocb->private == NULL);
 
@@ -2976,7 +2976,7 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb,
 	 * conversion. This also disallows race between truncate() and
 	 * overwrite DIO as i_dio_count needs to be incremented under i_mutex.
 	 */
-	if (rw == WRITE)
+	if (iov_iter_rw(iter) == WRITE)
 		atomic_inc(&inode->i_dio_count);
 
 	/* If we do a overwrite dio, i_mutex locking can be released */
@@ -3078,7 +3078,7 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb,
 	}
 
 retake_lock:
-	if (rw == WRITE)
+	if (iov_iter_rw(iter) == WRITE)
 		inode_dio_done(inode);
 	/* take i_mutex locking again if we do a ovewrite dio */
 	if (overwrite) {
@@ -3107,12 +3107,12 @@ static ssize_t ext4_direct_IO(int rw, struct kiocb *iocb,
 	if (ext4_has_inline_data(inode))
 		return 0;
 
-	trace_ext4_direct_IO_enter(inode, offset, count, rw);
+	trace_ext4_direct_IO_enter(inode, offset, count, iov_iter_rw(iter));
 	if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
-		ret = ext4_ext_direct_IO(rw, iocb, iter, offset);
+		ret = ext4_ext_direct_IO(iocb, iter, offset);
 	else
-		ret = ext4_ind_direct_IO(rw, iocb, iter, offset);
-	trace_ext4_direct_IO_exit(inode, offset, count, rw, ret);
+		ret = ext4_ind_direct_IO(iocb, iter, offset);
+	trace_ext4_direct_IO_exit(inode, offset, count, iov_iter_rw(iter), ret);
 	return ret;
 }
 
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index e16adebcb9b6..ce25f62edfa7 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1118,12 +1118,12 @@ static int f2fs_write_end(struct file *file,
 	return copied;
 }
 
-static int check_direct_IO(struct inode *inode, int rw,
-		struct iov_iter *iter, loff_t offset)
+static int check_direct_IO(struct inode *inode, struct iov_iter *iter,
+			   loff_t offset)
 {
 	unsigned blocksize_mask = inode->i_sb->s_blocksize - 1;
 
-	if (rw == READ)
+	if (iov_iter_rw(iter) == READ)
 		return 0;
 
 	if (offset & blocksize_mask)
@@ -1151,19 +1151,19 @@ static ssize_t f2fs_direct_IO(int rw, struct kiocb *iocb,
 			return err;
 	}
 
-	if (check_direct_IO(inode, rw, iter, offset))
+	if (check_direct_IO(inode, iter, offset))
 		return 0;
 
-	trace_f2fs_direct_IO_enter(inode, offset, count, rw);
+	trace_f2fs_direct_IO_enter(inode, offset, count, iov_iter_rw(iter));
 
-	if (rw & WRITE)
+	if (iov_iter_rw(iter) == WRITE)
 		__allocate_data_blocks(inode, offset, count);
 
 	err = blockdev_direct_IO(iocb, inode, iter, offset, get_data_block);
-	if (err < 0 && (rw & WRITE))
+	if (err < 0 && iov_iter_rw(iter) == WRITE)
 		f2fs_write_failed(mapping, offset + count);
 
-	trace_f2fs_direct_IO_exit(inode, offset, count, rw, err);
+	trace_f2fs_direct_IO_exit(inode, offset, count, iov_iter_rw(iter), err);
 
 	return err;
 }
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index a1a39f571e78..342d791b28db 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -255,7 +255,7 @@ static ssize_t fat_direct_IO(int rw, struct kiocb *iocb,
 	size_t count = iov_iter_count(iter);
 	ssize_t ret;
 
-	if (rw == WRITE) {
+	if (iov_iter_rw(iter) == WRITE) {
 		/*
 		 * FIXME: blockdev_direct_IO() doesn't use ->write_begin(),
 		 * so we need to update the ->mmu_private to block boundary.
@@ -275,7 +275,7 @@ static ssize_t fat_direct_IO(int rw, struct kiocb *iocb,
 	 * condition of fat_get_block() and ->truncate().
 	 */
 	ret = blockdev_direct_IO(iocb, inode, iter, offset, fat_get_block);
-	if (ret < 0 && (rw & WRITE))
+	if (ret < 0 && iov_iter_rw(iter) == WRITE)
 		fat_write_failed(mapping, offset + count);
 
 	return ret;
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index e1afdd7abf90..c1a67da6a8a0 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -2800,11 +2800,11 @@ fuse_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
 	inode = file->f_mapping->host;
 	i_size = i_size_read(inode);
 
-	if ((rw == READ) && (offset > i_size))
+	if ((iov_iter_rw(iter) == READ) && (offset > i_size))
 		return 0;
 
 	/* optimization for short read */
-	if (async_dio && rw != WRITE && offset + count > i_size) {
+	if (async_dio && iov_iter_rw(iter) != WRITE && offset + count > i_size) {
 		if (offset >= i_size)
 			return 0;
 		count = min_t(loff_t, count, fuse_round_up(i_size - offset));
@@ -2819,7 +2819,7 @@ fuse_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
 	io->bytes = -1;
 	io->size = 0;
 	io->offset = offset;
-	io->write = (rw == WRITE);
+	io->write = (iov_iter_rw(iter) == WRITE);
 	io->err = 0;
 	io->file = file;
 	/*
@@ -2834,13 +2834,14 @@ fuse_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
 	 * to wait on real async I/O requests, so we must submit this request
 	 * synchronously.
 	 */
-	if (!is_sync_kiocb(iocb) && (offset + count > i_size) && rw == WRITE)
+	if (!is_sync_kiocb(iocb) && (offset + count > i_size) &&
+	    iov_iter_rw(iter) == WRITE)
 		io->async = false;
 
 	if (io->async && is_sync_kiocb(iocb))
 		io->done = &wait;
 
-	if (rw == WRITE) {
+	if (iov_iter_rw(iter) == WRITE) {
 		ret = generic_write_checks(file, &pos, &count, 0);
 		if (!ret) {
 			iov_iter_truncate(iter, count);
@@ -2865,7 +2866,7 @@ fuse_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
 
 	kfree(io);
 
-	if (rw == WRITE) {
+	if (iov_iter_rw(iter) == WRITE) {
 		if (ret > 0)
 			fuse_write_update_size(inode, pos);
 		else if (ret < 0 && offset + count > i_size)
diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c
index 59983a18cab4..e22e6e686a11 100644
--- a/fs/gfs2/aops.c
+++ b/fs/gfs2/aops.c
@@ -1016,13 +1016,12 @@ out:
 /**
  * gfs2_ok_for_dio - check that dio is valid on this file
  * @ip: The inode
- * @rw: READ or WRITE
  * @offset: The offset at which we are reading or writing
  *
  * Returns: 0 (to ignore the i/o request and thus fall back to buffered i/o)
  *          1 (to accept the i/o request)
  */
-static int gfs2_ok_for_dio(struct gfs2_inode *ip, int rw, loff_t offset)
+static int gfs2_ok_for_dio(struct gfs2_inode *ip, loff_t offset)
 {
 	/*
 	 * Should we return an error here? I can't see that O_DIRECT for
@@ -1061,7 +1060,7 @@ static ssize_t gfs2_direct_IO(int rw, struct kiocb *iocb,
 	rv = gfs2_glock_nq(&gh);
 	if (rv)
 		return rv;
-	rv = gfs2_ok_for_dio(ip, rw, offset);
+	rv = gfs2_ok_for_dio(ip, offset);
 	if (rv != 1)
 		goto out; /* dio not valid, fall back to buffered i/o */
 
@@ -1091,7 +1090,7 @@ static ssize_t gfs2_direct_IO(int rw, struct kiocb *iocb,
 		rv = filemap_write_and_wait_range(mapping, lstart, end);
 		if (rv)
 			goto out;
-		if (rw == WRITE)
+		if (iov_iter_rw(iter) == WRITE)
 			truncate_inode_pages_range(mapping, lstart, end);
 	}
 
diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c
index e92d175d1fd7..0085d527a55c 100644
--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -139,7 +139,7 @@ static ssize_t hfs_direct_IO(int rw, struct kiocb *iocb,
 	 * In case of error extending write may have instantiated a few
 	 * blocks outside i_size. Trim these off again.
 	 */
-	if (unlikely((rw & WRITE) && ret < 0)) {
+	if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) {
 		loff_t isize = i_size_read(inode);
 		loff_t end = offset + count;
 
diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index 2a98dc07c22c..afcde36b506b 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -137,7 +137,7 @@ static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
 	 * In case of error extending write may have instantiated a few
 	 * blocks outside i_size. Trim these off again.
 	 */
-	if (unlikely((rw & WRITE) && ret < 0)) {
+	if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) {
 		loff_t isize = i_size_read(inode);
 		loff_t end = offset + count;
 
diff --git a/fs/jfs/inode.c b/fs/jfs/inode.c
index c20f7883543f..e7047b63ffc5 100644
--- a/fs/jfs/inode.c
+++ b/fs/jfs/inode.c
@@ -345,7 +345,7 @@ static ssize_t jfs_direct_IO(int rw, struct kiocb *iocb,
 	 * In case of error extending write may have instantiated a few
 	 * blocks outside i_size. Trim these off again.
 	 */
-	if (unlikely((rw & WRITE) && ret < 0)) {
+	if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) {
 		loff_t isize = i_size_read(inode);
 		loff_t end = offset + count;
 
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index c3929fb2ab26..e8482b8f4830 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -267,7 +267,7 @@ ssize_t nfs_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter, loff_t
 #else
 	VM_BUG_ON(iov_iter_count(iter) != PAGE_SIZE);
 
-	if (rw == READ)
+	if (iov_iter_rw(iter) == READ)
 		return nfs_file_direct_read(iocb, iter, pos);
 	return nfs_file_direct_write(iocb, iter, pos);
 #endif /* CONFIG_NFS_SWAP */
diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c
index 3727b8caa46e..4726f1493d5d 100644
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -314,7 +314,7 @@ nilfs_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
 	size_t count = iov_iter_count(iter);
 	ssize_t size;
 
-	if (rw == WRITE)
+	if (iov_iter_rw(iter) == WRITE)
 		return 0;
 
 	/* Needs synchronization with the cleaner */
@@ -324,7 +324,7 @@ nilfs_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
 	 * In case of error extending write may have instantiated a few
 	 * blocks outside i_size. Trim these off again.
 	 */
-	if (unlikely((rw & WRITE) && size < 0)) {
+	if (unlikely(iov_iter_rw(iter) == WRITE && size < 0)) {
 		loff_t isize = i_size_read(inode);
 		loff_t end = offset + count;
 
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index 68cb199fb2b6..0ee9474cca46 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -842,7 +842,7 @@ static ssize_t ocfs2_direct_IO(int rw,
 	if (i_size_read(inode) <= offset && !full_coherency)
 		return 0;
 
-	if (rw == READ)
+	if (iov_iter_rw(iter) == READ)
 		return __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev,
 					    iter, offset,
 					    ocfs2_direct_IO_get_blocks,
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index a51e9177b056..d61ab13244a8 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -3293,7 +3293,7 @@ static ssize_t reiserfs_direct_IO(int rw, struct kiocb *iocb,
 	 * In case of error extending write may have instantiated a few
 	 * blocks outside i_size. Trim these off again.
 	 */
-	if (unlikely((rw & WRITE) && ret < 0)) {
+	if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) {
 		loff_t isize = i_size_read(inode);
 		loff_t end = offset + count;
 
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 3adf49c01c19..a685aea93068 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -226,7 +226,7 @@ static ssize_t udf_direct_IO(int rw, struct kiocb *iocb,
 	ssize_t ret;
 
 	ret = blockdev_direct_IO(iocb, inode, iter, offset, udf_get_block);
-	if (unlikely(ret < 0 && (rw & WRITE)))
+	if (unlikely(ret < 0 && iov_iter_rw(iter) == WRITE))
 		udf_write_failed(mapping, offset + count);
 	return ret;
 }
diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
index 5ca504c66e85..532d5279df2f 100644
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -1503,7 +1503,7 @@ xfs_vm_direct_IO(
 	struct inode		*inode = iocb->ki_filp->f_mapping->host;
 	struct block_device	*bdev = xfs_find_bdev_for_inode(inode);
 
-	if (rw & WRITE) {
+	if (iov_iter_rw(iter) == WRITE) {
 		return __blockdev_direct_IO(iocb, inode, bdev, iter, offset,
 					    xfs_get_blocks_direct,
 					    xfs_end_io_direct_write, NULL,
-- 
cgit v1.2.3


From 22c6186ecea0be9eff1c399298ad36e94a59995f Mon Sep 17 00:00:00 2001
From: Omar Sandoval <osandov@osandov.com>
Date: Mon, 16 Mar 2015 04:33:53 -0700
Subject: direct_IO: remove rw from a_ops->direct_IO()

Now that no one is using rw, remove it completely.

Signed-off-by: Omar Sandoval <osandov@osandov.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 Documentation/filesystems/Locking          | 2 +-
 Documentation/filesystems/vfs.txt          | 2 +-
 drivers/staging/lustre/lustre/llite/rw26.c | 4 ++--
 fs/9p/vfs_addr.c                           | 3 +--
 fs/affs/file.c                             | 3 +--
 fs/block_dev.c                             | 3 +--
 fs/btrfs/inode.c                           | 4 ++--
 fs/ceph/addr.c                             | 3 +--
 fs/cifs/file.c                             | 3 +--
 fs/exofs/inode.c                           | 4 ++--
 fs/ext2/inode.c                            | 3 +--
 fs/ext3/inode.c                            | 4 ++--
 fs/ext4/inode.c                            | 4 ++--
 fs/f2fs/data.c                             | 4 ++--
 fs/fat/inode.c                             | 3 +--
 fs/fuse/file.c                             | 3 +--
 fs/gfs2/aops.c                             | 4 ++--
 fs/hfs/inode.c                             | 4 ++--
 fs/hfsplus/inode.c                         | 4 ++--
 fs/jfs/inode.c                             | 4 ++--
 fs/nfs/direct.c                            | 3 +--
 fs/nilfs2/inode.c                          | 3 +--
 fs/ocfs2/aops.c                            | 4 +---
 fs/reiserfs/inode.c                        | 4 ++--
 fs/udf/file.c                              | 3 +--
 fs/udf/inode.c                             | 3 +--
 fs/xfs/xfs_aops.c                          | 1 -
 include/linux/fs.h                         | 2 +-
 include/linux/nfs_fs.h                     | 2 +-
 mm/filemap.c                               | 4 ++--
 mm/page_io.c                               | 4 +---
 31 files changed, 42 insertions(+), 59 deletions(-)

(limited to 'fs/ext2')

diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index c3cd6279e92e..7cdbca44e343 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -196,7 +196,7 @@ prototypes:
 	void (*invalidatepage) (struct page *, unsigned int, unsigned int);
 	int (*releasepage) (struct page *, int);
 	void (*freepage)(struct page *);
-	int (*direct_IO)(int, struct kiocb *, struct iov_iter *iter, loff_t offset);
+	int (*direct_IO)(struct kiocb *, struct iov_iter *iter, loff_t offset);
 	int (*migratepage)(struct address_space *, struct page *, struct page *);
 	int (*launder_page)(struct page *);
 	int (*is_partially_uptodate)(struct page *, unsigned long, unsigned long);
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index 207cdca68bed..5d833b32bbcd 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -590,7 +590,7 @@ struct address_space_operations {
 	void (*invalidatepage) (struct page *, unsigned int, unsigned int);
 	int (*releasepage) (struct page *, int);
 	void (*freepage)(struct page *);
-	ssize_t (*direct_IO)(int, struct kiocb *, struct iov_iter *iter, loff_t offset);
+	ssize_t (*direct_IO)(struct kiocb *, struct iov_iter *iter, loff_t offset);
 	/* migrate the contents of a page to the specified target */
 	int (*migratepage) (struct page *, struct page *);
 	int (*launder_page) (struct page *);
diff --git a/drivers/staging/lustre/lustre/llite/rw26.c b/drivers/staging/lustre/lustre/llite/rw26.c
index 3aa9de6bcc40..0d7ce6b0e23c 100644
--- a/drivers/staging/lustre/lustre/llite/rw26.c
+++ b/drivers/staging/lustre/lustre/llite/rw26.c
@@ -359,8 +359,8 @@ static ssize_t ll_direct_IO_26_seg(const struct lu_env *env, struct cl_io *io,
  * up to 22MB for 128kB kmalloc and up to 682MB for 4MB kmalloc. */
 #define MAX_DIO_SIZE ((MAX_MALLOC / sizeof(struct brw_page) * PAGE_CACHE_SIZE) & \
 		      ~(DT_MAX_BRW_SIZE - 1))
-static ssize_t ll_direct_IO_26(int rw, struct kiocb *iocb,
-			       struct iov_iter *iter, loff_t file_offset)
+static ssize_t ll_direct_IO_26(struct kiocb *iocb, struct iov_iter *iter,
+			       loff_t file_offset)
 {
 	struct lu_env *env;
 	struct cl_io *io;
diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c
index dd5543b1d183..be35d05a4d0e 100644
--- a/fs/9p/vfs_addr.c
+++ b/fs/9p/vfs_addr.c
@@ -230,7 +230,6 @@ static int v9fs_launder_page(struct page *page)
 
 /**
  * v9fs_direct_IO - 9P address space operation for direct I/O
- * @rw: direction (read or write)
  * @iocb: target I/O control block
  * @iov: array of vectors that define I/O buffer
  * @pos: offset in file to begin the operation
@@ -248,7 +247,7 @@ static int v9fs_launder_page(struct page *page)
  *
  */
 static ssize_t
-v9fs_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter, loff_t pos)
+v9fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter, loff_t pos)
 {
 	struct file *file = iocb->ki_filp;
 	ssize_t n;
diff --git a/fs/affs/file.c b/fs/affs/file.c
index 7f05a468d594..dcf27951781c 100644
--- a/fs/affs/file.c
+++ b/fs/affs/file.c
@@ -389,8 +389,7 @@ static void affs_write_failed(struct address_space *mapping, loff_t to)
 }
 
 static ssize_t
-affs_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
-	       loff_t offset)
+affs_direct_IO(struct kiocb *iocb, struct iov_iter *iter, loff_t offset)
 {
 	struct file *file = iocb->ki_filp;
 	struct address_space *mapping = file->f_mapping;
diff --git a/fs/block_dev.c b/fs/block_dev.c
index bc23afd35fdb..6e3de63c3055 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -146,8 +146,7 @@ blkdev_get_block(struct inode *inode, sector_t iblock,
 }
 
 static ssize_t
-blkdev_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
-			loff_t offset)
+blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, loff_t offset)
 {
 	struct file *file = iocb->ki_filp;
 	struct inode *inode = file->f_mapping->host;
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index ca69e83d4f3c..43192e10cc43 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -8114,8 +8114,8 @@ out:
 	return retval;
 }
 
-static ssize_t btrfs_direct_IO(int rw, struct kiocb *iocb,
-			struct iov_iter *iter, loff_t offset)
+static ssize_t btrfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
+			       loff_t offset)
 {
 	struct file *file = iocb->ki_filp;
 	struct inode *inode = file->f_mapping->host;
diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index fd5599d32362..155ab9c0246b 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -1198,8 +1198,7 @@ static int ceph_write_end(struct file *file, struct address_space *mapping,
  * intercept O_DIRECT reads and writes early, this function should
  * never get called.
  */
-static ssize_t ceph_direct_io(int rw, struct kiocb *iocb,
-			      struct iov_iter *iter,
+static ssize_t ceph_direct_io(struct kiocb *iocb, struct iov_iter *iter,
 			      loff_t pos)
 {
 	WARN_ON(1);
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index ca30c391a894..72394c5abd0f 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -3877,8 +3877,7 @@ void cifs_oplock_break(struct work_struct *work)
  * Direct IO is not yet supported in the cached mode. 
  */
 static ssize_t
-cifs_direct_io(int rw, struct kiocb *iocb, struct iov_iter *iter,
-               loff_t pos)
+cifs_direct_io(struct kiocb *iocb, struct iov_iter *iter, loff_t pos)
 {
         /*
          * FIXME
diff --git a/fs/exofs/inode.c b/fs/exofs/inode.c
index a198e94813fe..35073aaec6e0 100644
--- a/fs/exofs/inode.c
+++ b/fs/exofs/inode.c
@@ -963,8 +963,8 @@ static void exofs_invalidatepage(struct page *page, unsigned int offset,
 
 
  /* TODO: Should be easy enough to do proprly */
-static ssize_t exofs_direct_IO(int rw, struct kiocb *iocb,
-		struct iov_iter *iter, loff_t offset)
+static ssize_t exofs_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
+			       loff_t offset)
 {
 	return 0;
 }
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index 685e514c57dd..e1abf75e994c 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -851,8 +851,7 @@ static sector_t ext2_bmap(struct address_space *mapping, sector_t block)
 }
 
 static ssize_t
-ext2_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
-			loff_t offset)
+ext2_direct_IO(struct kiocb *iocb, struct iov_iter *iter, loff_t offset)
 {
 	struct file *file = iocb->ki_filp;
 	struct address_space *mapping = file->f_mapping;
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index c70839d26ccd..13c0868c7160 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -1820,8 +1820,8 @@ static int ext3_releasepage(struct page *page, gfp_t wait)
  * crashes then stale disk data _may_ be exposed inside the file. But current
  * VFS code falls back into buffered path in that case so we are safe.
  */
-static ssize_t ext3_direct_IO(int rw, struct kiocb *iocb,
-			struct iov_iter *iter, loff_t offset)
+static ssize_t ext3_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
+			      loff_t offset)
 {
 	struct file *file = iocb->ki_filp;
 	struct inode *inode = file->f_mapping->host;
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index cf6ba6536035..42c942a950e1 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3089,8 +3089,8 @@ retake_lock:
 	return ret;
 }
 
-static ssize_t ext4_direct_IO(int rw, struct kiocb *iocb,
-			      struct iov_iter *iter, loff_t offset)
+static ssize_t ext4_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
+			      loff_t offset)
 {
 	struct file *file = iocb->ki_filp;
 	struct inode *inode = file->f_mapping->host;
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index ce25f62edfa7..319eda511c4f 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1135,8 +1135,8 @@ static int check_direct_IO(struct inode *inode, struct iov_iter *iter,
 	return 0;
 }
 
-static ssize_t f2fs_direct_IO(int rw, struct kiocb *iocb,
-		struct iov_iter *iter, loff_t offset)
+static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
+			      loff_t offset)
 {
 	struct file *file = iocb->ki_filp;
 	struct address_space *mapping = file->f_mapping;
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 342d791b28db..41b729933638 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -245,8 +245,7 @@ static int fat_write_end(struct file *file, struct address_space *mapping,
 	return err;
 }
 
-static ssize_t fat_direct_IO(int rw, struct kiocb *iocb,
-			     struct iov_iter *iter,
+static ssize_t fat_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
 			     loff_t offset)
 {
 	struct file *file = iocb->ki_filp;
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index c1a67da6a8a0..3d355e946991 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -2782,8 +2782,7 @@ static inline loff_t fuse_round_up(loff_t off)
 }
 
 static ssize_t
-fuse_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
-			loff_t offset)
+fuse_direct_IO(struct kiocb *iocb, struct iov_iter *iter, loff_t offset)
 {
 	DECLARE_COMPLETION_ONSTACK(wait);
 	ssize_t ret = 0;
diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c
index e22e6e686a11..20dd33da92de 100644
--- a/fs/gfs2/aops.c
+++ b/fs/gfs2/aops.c
@@ -1038,8 +1038,8 @@ static int gfs2_ok_for_dio(struct gfs2_inode *ip, loff_t offset)
 
 
 
-static ssize_t gfs2_direct_IO(int rw, struct kiocb *iocb,
-			      struct iov_iter *iter, loff_t offset)
+static ssize_t gfs2_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
+			      loff_t offset)
 {
 	struct file *file = iocb->ki_filp;
 	struct inode *inode = file->f_mapping->host;
diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c
index 0085d527a55c..75fd5d873c19 100644
--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -124,8 +124,8 @@ static int hfs_releasepage(struct page *page, gfp_t mask)
 	return res ? try_to_free_buffers(page) : 0;
 }
 
-static ssize_t hfs_direct_IO(int rw, struct kiocb *iocb,
-		struct iov_iter *iter, loff_t offset)
+static ssize_t hfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
+			     loff_t offset)
 {
 	struct file *file = iocb->ki_filp;
 	struct address_space *mapping = file->f_mapping;
diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index afcde36b506b..a43811f90935 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -122,8 +122,8 @@ static int hfsplus_releasepage(struct page *page, gfp_t mask)
 	return res ? try_to_free_buffers(page) : 0;
 }
 
-static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
-		struct iov_iter *iter, loff_t offset)
+static ssize_t hfsplus_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
+				 loff_t offset)
 {
 	struct file *file = iocb->ki_filp;
 	struct address_space *mapping = file->f_mapping;
diff --git a/fs/jfs/inode.c b/fs/jfs/inode.c
index e7047b63ffc5..070dc4b33544 100644
--- a/fs/jfs/inode.c
+++ b/fs/jfs/inode.c
@@ -330,8 +330,8 @@ static sector_t jfs_bmap(struct address_space *mapping, sector_t block)
 	return generic_block_bmap(mapping, block, jfs_get_block);
 }
 
-static ssize_t jfs_direct_IO(int rw, struct kiocb *iocb,
-	struct iov_iter *iter, loff_t offset)
+static ssize_t jfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
+			     loff_t offset)
 {
 	struct file *file = iocb->ki_filp;
 	struct address_space *mapping = file->f_mapping;
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index e8482b8f4830..06503bc604e1 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -240,7 +240,6 @@ static int nfs_direct_cmp_commit_data_verf(struct nfs_direct_req *dreq,
 
 /**
  * nfs_direct_IO - NFS address space operation for direct I/O
- * @rw: direction (read or write)
  * @iocb: target I/O control block
  * @iov: array of vectors that define I/O buffer
  * @pos: offset in file to begin the operation
@@ -251,7 +250,7 @@ static int nfs_direct_cmp_commit_data_verf(struct nfs_direct_req *dreq,
  * shunt off direct read and write requests before the VFS gets them,
  * so this method is only ever called for swap.
  */
-ssize_t nfs_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter, loff_t pos)
+ssize_t nfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter, loff_t pos)
 {
 	struct inode *inode = iocb->ki_filp->f_mapping->host;
 
diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c
index 4726f1493d5d..36f057fa8aa3 100644
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -305,8 +305,7 @@ static int nilfs_write_end(struct file *file, struct address_space *mapping,
 }
 
 static ssize_t
-nilfs_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
-		loff_t offset)
+nilfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter, loff_t offset)
 {
 	struct file *file = iocb->ki_filp;
 	struct address_space *mapping = file->f_mapping;
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index 0ee9474cca46..28b5ad81bbec 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -818,9 +818,7 @@ out:
 	return ret;
 }
 
-static ssize_t ocfs2_direct_IO(int rw,
-			       struct kiocb *iocb,
-			       struct iov_iter *iter,
+static ssize_t ocfs2_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
 			       loff_t offset)
 {
 	struct file *file = iocb->ki_filp;
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index d61ab13244a8..742242b60972 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -3278,8 +3278,8 @@ static int reiserfs_releasepage(struct page *page, gfp_t unused_gfp_flags)
  * We thank Mingming Cao for helping us understand in great detail what
  * to do in this section of the code.
  */
-static ssize_t reiserfs_direct_IO(int rw, struct kiocb *iocb,
-				  struct iov_iter *iter, loff_t offset)
+static ssize_t reiserfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
+				  loff_t offset)
 {
 	struct file *file = iocb->ki_filp;
 	struct inode *inode = file->f_mapping->host;
diff --git a/fs/udf/file.c b/fs/udf/file.c
index 74050bff64f4..78d42548b260 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -100,8 +100,7 @@ static int udf_adinicb_write_begin(struct file *file,
 	return 0;
 }
 
-static ssize_t udf_adinicb_direct_IO(int rw, struct kiocb *iocb,
-				     struct iov_iter *iter,
+static ssize_t udf_adinicb_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
 				     loff_t offset)
 {
 	/* Fallback to buffered I/O. */
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index a685aea93068..4f178c83b04f 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -215,8 +215,7 @@ static int udf_write_begin(struct file *file, struct address_space *mapping,
 	return ret;
 }
 
-static ssize_t udf_direct_IO(int rw, struct kiocb *iocb,
-			     struct iov_iter *iter,
+static ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
 			     loff_t offset)
 {
 	struct file *file = iocb->ki_filp;
diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
index 532d5279df2f..1d8eef9cf0f5 100644
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -1495,7 +1495,6 @@ xfs_end_io_direct_write(
 
 STATIC ssize_t
 xfs_vm_direct_IO(
-	int			rw,
 	struct kiocb		*iocb,
 	struct iov_iter		*iter,
 	loff_t			offset)
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 295bc589fe1b..72e3759de8c3 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -383,7 +383,7 @@ struct address_space_operations {
 	void (*invalidatepage) (struct page *, unsigned int, unsigned int);
 	int (*releasepage) (struct page *, gfp_t);
 	void (*freepage)(struct page *);
-	ssize_t (*direct_IO)(int, struct kiocb *, struct iov_iter *iter, loff_t offset);
+	ssize_t (*direct_IO)(struct kiocb *, struct iov_iter *iter, loff_t offset);
 	/*
 	 * migrate the contents of a page to the specified target. If
 	 * migrate_mode is MIGRATE_ASYNC, it must not block.
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index b01ccf371fdc..3d1b0d2fe55e 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -447,7 +447,7 @@ static inline struct rpc_cred *nfs_file_cred(struct file *file)
 /*
  * linux/fs/nfs/direct.c
  */
-extern ssize_t nfs_direct_IO(int, struct kiocb *, struct iov_iter *, loff_t);
+extern ssize_t nfs_direct_IO(struct kiocb *, struct iov_iter *, loff_t);
 extern ssize_t nfs_file_direct_read(struct kiocb *iocb,
 			struct iov_iter *iter,
 			loff_t pos);
diff --git a/mm/filemap.c b/mm/filemap.c
index 876f4e6f3ed6..9920db455f05 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1707,7 +1707,7 @@ generic_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
 					pos + count - 1);
 		if (!retval) {
 			struct iov_iter data = *iter;
-			retval = mapping->a_ops->direct_IO(READ, iocb, &data, pos);
+			retval = mapping->a_ops->direct_IO(iocb, &data, pos);
 		}
 
 		if (retval > 0) {
@@ -2395,7 +2395,7 @@ generic_file_direct_write(struct kiocb *iocb, struct iov_iter *from, loff_t pos)
 	}
 
 	data = *from;
-	written = mapping->a_ops->direct_IO(WRITE, iocb, &data, pos);
+	written = mapping->a_ops->direct_IO(iocb, &data, pos);
 
 	/*
 	 * Finally, try again to invalidate clean pages which might have been
diff --git a/mm/page_io.c b/mm/page_io.c
index a96c8562d835..6424869e275e 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -277,9 +277,7 @@ int __swap_writepage(struct page *page, struct writeback_control *wbc,
 
 		set_page_writeback(page);
 		unlock_page(page);
-		ret = mapping->a_ops->direct_IO(ITER_BVEC | WRITE,
-						&kiocb, &from,
-						kiocb.ki_pos);
+		ret = mapping->a_ops->direct_IO(&kiocb, &from, kiocb.ki_pos);
 		if (ret == PAGE_SIZE) {
 			count_vm_event(PSWPOUT);
 			ret = 0;
-- 
cgit v1.2.3