shmem: switch to ->read_iter()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/mm/shmem.c b/mm/shmem.c
index e0b7669..edc6c7e 100644 (file)
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1402,8 +1402,7 @@ shmem_write_end(struct file *file, struct address_space *mapping,
        return copied;
 }
 
-static ssize_t shmem_file_aio_read(struct kiocb *iocb,
-               const struct iovec *iov, unsigned long nr_segs, loff_t pos)
+static ssize_t shmem_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
 {
        struct file *file = iocb->ki_filp;
        struct inode *inode = file_inode(file);
@@ -1413,11 +1412,7 @@ static ssize_t shmem_file_aio_read(struct kiocb *iocb,
        enum sgp_type sgp = SGP_READ;
        int error = 0;
        ssize_t retval = 0;
-       size_t count = iov_length(iov, nr_segs);
        loff_t *ppos = &iocb->ki_pos;
-       struct iov_iter iter;
-
-       iov_iter_init(&iter, READ, iov, nr_segs, count);
 
        /*
         * Might this read be for a stacking filesystem?  Then when reading
@@ -1493,14 +1488,14 @@ static ssize_t shmem_file_aio_read(struct kiocb *iocb,
                 * Ok, we have the page, and it's up-to-date, so
                 * now we can copy it to user space...
                 */
-               ret = copy_page_to_iter(page, offset, nr, &iter);
+               ret = copy_page_to_iter(page, offset, nr, to);
                retval += ret;
                offset += ret;
                index += offset >> PAGE_CACHE_SHIFT;
                offset &= ~PAGE_CACHE_MASK;
 
                page_cache_release(page);
-               if (!iov_iter_count(&iter))
+               if (!iov_iter_count(to))
                        break;
                if (ret < nr) {
                        error = -EFAULT;
@@ -2622,9 +2617,9 @@ static const struct file_operations shmem_file_operations = {
        .mmap           = shmem_mmap,
 #ifdef CONFIG_TMPFS
        .llseek         = shmem_file_llseek,
-       .read           = do_sync_read,
+       .read           = new_sync_read,
        .write          = do_sync_write,
-       .aio_read       = shmem_file_aio_read,
+       .read_iter      = shmem_file_read_iter,
        .aio_write      = generic_file_aio_write,
        .fsync          = noop_fsync,
        .splice_read    = shmem_file_splice_read,