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 ])
  25
  26 dnl #
  27 dnl # 4.13 API change
  28 dnl # The bio->bi_error field was replaced with bio->bi_status which is an
  29 dnl # enum which describes all possible error types.
  30 dnl #
  31 AC_DEFUN([ZFS_AC_KERNEL_BIO_BI_STATUS], [
  32         AC_MSG_CHECKING([whether bio->bi_status exists])
  33         ZFS_LINUX_TRY_COMPILE([
  34                 #include <linux/bio.h>
  35         ],[
  36                 struct bio bio __attribute__ ((unused));
  37                 blk_status_t status __attribute__ ((unused)) = BLK_STS_OK;
  38
  39                 bio.bi_status = status;
  40         ],[
  41                 AC_MSG_RESULT(yes)
  42                 AC_DEFINE(HAVE_BIO_BI_STATUS, 1, [bio->bi_status exists])
  43         ],[
  44                 AC_MSG_RESULT(no)
  45         ])
  46 ])