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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 <[email protected]>
Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Omar Sandoval 2015-03-16 04:33:52 -07:00 • committed by Al Viro
commit 6f67376318
22 changed files with 69 additions and 69 deletions
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13
fs/fuse/file.c
View file

@ -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)