Linux 4.1 compat: use read_iter() / write_iter()

[mirror_zfs.git] / config / kernel-vfs-rw-iterate.m4

diff --git a/config/kernel-vfs-rw-iterate.m4 b/config/kernel-vfs-rw-iterate.m4
new file mode 100644 (file)
index 0000000..f8dc422
--- /dev/null
+++ b/config/kernel-vfs-rw-iterate.m4
@@ -0,0 +1,27 @@
+dnl #
+dnl # Linux 4.1.x API
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL_VFS_RW_ITERATE],
+       [AC_MSG_CHECKING([whether fops->read/write_iter() are available])
+       ZFS_LINUX_TRY_COMPILE([
+               #include <linux/fs.h>
+
+               ssize_t test_read(struct kiocb *kiocb, struct iov_iter *to)
+                   { return 0; }
+               ssize_t test_write(struct kiocb *kiocb, struct iov_iter *from)
+                   { return 0; }
+
+               static const struct file_operations
+                   fops __attribute__ ((unused)) = {
+                   .read_iter = test_read,
+                   .write_iter = test_write,
+               };
+       ],[
+       ],[
+               AC_MSG_RESULT(yes)
+               AC_DEFINE(HAVE_VFS_RW_ITERATE, 1,
+                       [fops->read/write_iter() are available])
+       ],[
+               AC_MSG_RESULT(no)
+       ])
+])