Match the behaviour of new_sync_read() and __kernel_write().
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
---
fs/read_write.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/read_write.c b/fs/read_write.c
index 7ee07f76fafc..cf420e57541f 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -449,11 +449,12 @@ ssize_t __kernel_read(struct file *file, void *buf, size_t count, loff_t *pos)
return warn_unsupported(file, "read");
init_sync_kiocb(&kiocb, file);
- kiocb.ki_pos = *pos;
+ kiocb.ki_pos = pos ? *pos : 0;
iov_iter_kvec(&iter, READ, &iov, 1, iov.iov_len);
ret = file->f_op->read_iter(&kiocb, &iter);
if (ret > 0) {
- *pos = kiocb.ki_pos;
+ if (pos)
+ *pos = kiocb.ki_pos;
fsnotify_access(file);
add_rchar(current, ret);
}
--
2.28.0
