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>

24 files changed, 33 insertions, 48 deletions

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)