config/kernel-vfs-rw-iterate.m4

   1 dnl #
   2 dnl # Linux 4.1.x API
   3 dnl #
   4 AC_DEFUN([ZFS_AC_KERNEL_VFS_RW_ITERATE],
   5         [AC_MSG_CHECKING([whether fops->read/write_iter() are available])
   6         ZFS_LINUX_TRY_COMPILE([
   7                 #include <linux/fs.h>
   8
   9                 ssize_t test_read(struct kiocb *kiocb, struct iov_iter *to)
  10                     { return 0; }
  11                 ssize_t test_write(struct kiocb *kiocb, struct iov_iter *from)
  12                     { return 0; }
  13
  14                 static const struct file_operations
  15                     fops __attribute__ ((unused)) = {
  16                     .read_iter = test_read,
  17                     .write_iter = test_write,
  18                 };
  19         ],[
  20         ],[
  21                 AC_MSG_RESULT(yes)
  22                 AC_DEFINE(HAVE_VFS_RW_ITERATE, 1,
  23                         [fops->read/write_iter() are available])
  24         ],[
  25                 AC_MSG_RESULT(no)
  26         ])
  27 ])