fs: move kernel_read to fs/read_write.c
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/read_write.c b/fs/read_write.c
index 417dbe1..1ea862b 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -415,6 +415,22 @@ ssize_t __vfs_read(struct file *file, char __user *buf, size_t count,
}
EXPORT_SYMBOL(__vfs_read);
+int kernel_read(struct file *file, loff_t offset, char *addr,
+ unsigned long count)
+{
+ mm_segment_t old_fs;
+ loff_t pos = offset;
+ int result;
+
+ old_fs = get_fs();
+ set_fs(get_ds());
+ /* The cast to a user pointer is valid due to the set_fs() */
+ result = vfs_read(file, (void __user *)addr, count, &pos);
+ set_fs(old_fs);
+ return result;
+}
+EXPORT_SYMBOL(kernel_read);
+
ssize_t vfs_read(struct file *file, char __user *buf, size_t count, loff_t *pos)
{
ssize_t ret;