proc "single files": switch to ->read_iter

Implement ->read_iter for all proc "single files" so that more bionic
tests cases can pass when they call splice() on other fun files like
/proc/version

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 2f9fa17..f813276 100644 (file)
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -621,7 +621,7 @@ static int proc_single_open(struct inode *inode, struct file *file)
 static const struct proc_ops proc_single_ops = {
        /* not permanent -- can call into arbitrary ->single_show */
        .proc_open      = proc_single_open,
-       .proc_read      = seq_read,
+       .proc_read_iter = seq_read_iter,
        .proc_lseek     = seq_lseek,
        .proc_release   = single_release,
 };