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| author | Al Viro <viro@zeniv.linux.org.uk> | 2015-04-03 22:21:59 +0300 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2015-04-12 05:29:39 +0300 |
| commit | 283e7e5d249f4861c797679b6a5b53d525194c98 (patch) | |
| tree | a315a2ed99b9e943ed37b6c898854e0acb9eb6a2 /drivers/block/loop.c | |
| parent | 79ff50c09eee690985e178417b36d7128ece8b68 (diff) | |
| download | linux-283e7e5d249f4861c797679b6a5b53d525194c98.tar.xz | |
switch /dev/loop to vfs_iter_write()
all writable files that might be used as backing store for /dev/loop
already support ->write_iter()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'drivers/block/loop.c')
| -rw-r--r-- | drivers/block/loop.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/block/loop.c b/drivers/block/loop.c index d1f168b73634..c4fd1e45ce1e 100644 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -75,6 +75,7 @@ #include <linux/sysfs.h> #include <linux/miscdevice.h> #include <linux/falloc.h> +#include <linux/uio.h> #include "loop.h" #include <asm/uaccess.h> @@ -229,13 +230,14 @@ lo_do_transfer(struct loop_device *lo, int cmd, static int __do_lo_send_write(struct file *file, u8 *buf, const int len, loff_t pos) { + struct kvec kvec = {.iov_base = buf, .iov_len = len}; + struct iov_iter from; ssize_t bw; - mm_segment_t old_fs = get_fs(); + + iov_iter_kvec(&from, ITER_KVEC | WRITE, &kvec, 1, len); file_start_write(file); - set_fs(get_ds()); - bw = file->f_op->write(file, buf, len, &pos); - set_fs(old_fs); + bw = vfs_iter_write(file, &from, &pos); file_end_write(file); if (likely(bw == len)) return 0; @@ -767,7 +769,7 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode, goto out_putf; if (!(file->f_mode & FMODE_WRITE) || !(mode & FMODE_WRITE) || - !file->f_op->write) + !file->f_op->write_iter) lo_flags |= LO_FLAGS_READ_ONLY; lo_blocksize = S_ISBLK(inode->i_mode) ? |