config/kernel-bio-end-io-t-args.m4

   1 dnl #
   2 dnl # 4.3 API change
   3 dnl # Error argument dropped from bio_endio in favor of newly introduced
   4 dnl # bio->bi_error. This also replaces bio->bi_flags value BIO_UPTODATE.
   5 dnl # Introduced by torvalds/linux@4246a0b63bd8f56a1469b12eafeb875b1041a451
   6 dnl # ("block: add a bi_error field to struct bio").
   7 dnl #
   8 AC_DEFUN([ZFS_AC_KERNEL_BIO_END_IO_T_ARGS], [
   9         AC_MSG_CHECKING([whether bio_end_io_t wants 1 arg])
  10         ZFS_LINUX_TRY_COMPILE([
  11                 #include <linux/bio.h>
  12
  13                 void wanted_end_io(struct bio *bio) { return; }
  14
  15                 bio_end_io_t *end_io __attribute__ ((unused)) = wanted_end_io;
  16         ],[
  17         ],[
  18                 AC_MSG_RESULT(yes)
  19                 AC_DEFINE(HAVE_1ARG_BIO_END_IO_T, 1,
  20                           [bio_end_io_t wants 1 arg])
  21         ],[
  22                 AC_MSG_RESULT(no)
  23         ])
  24 ])