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direct_IO: use iov_iter_rw() instead of rw everywhere

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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>
This commit is contained in:
Omar Sandoval 2015-03-16 04:33:52 -07:00 • committed by Al Viro
parent a95cd63115
commit 6f67376318
22 changed files with 69 additions and 69 deletions
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20
fs/ext4/inode.c
View file

@ -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;
}