lift generic_write_checks() into callers of __generic_file_write_iter()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/mm/filemap.c b/mm/filemap.c
index 353f82e..a794a7f 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2560,19 +2560,9 @@
ssize_t written = 0;
ssize_t err;
ssize_t status;
- size_t count = iov_iter_count(from);
/* We can write back this queue in page reclaim */
current->backing_dev_info = inode_to_bdi(inode);
- err = generic_write_checks(file, &iocb->ki_pos, &count, S_ISBLK(inode->i_mode));
- if (err)
- goto out;
-
- if (count == 0)
- goto out;
-
- iov_iter_truncate(from, count);
-
err = file_remove_suid(file);
if (err)
goto out;
@@ -2651,9 +2641,14 @@
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
ssize_t ret;
+ size_t count = iov_iter_count(from);
mutex_lock(&inode->i_mutex);
- ret = __generic_file_write_iter(iocb, from);
+ ret = generic_write_checks(file, &iocb->ki_pos, &count, 0);
+ if (!ret && count) {
+ iov_iter_truncate(from, count);
+ ret = __generic_file_write_iter(iocb, from);
+ }
mutex_unlock(&inode->i_mutex);
if (ret > 0) {