config/kernel-current_bio_tail.m4

   1 dnl #
   2 dnl # 2.6.34 API change
   3 dnl # current->bio_tail and current->bio_list were struct bio pointers prior to
   4 dnl # Linux 2.6.34. They were refactored into a struct bio_list pointer called
   5 dnl # current->bio_list in Linux 2.6.34.
   6 dnl #
   7 AC_DEFUN([ZFS_AC_KERNEL_CURRENT_BIO_TAIL], [
   8         AC_MSG_CHECKING([whether current->bio_tail exists])
   9         ZFS_LINUX_TRY_COMPILE([
  10                 #include <linux/sched.h>
  11         ],[
  12                 current->bio_tail = (struct bio **) NULL;
  13         ],[
  14                 AC_MSG_RESULT(yes)
  15                 AC_DEFINE(HAVE_CURRENT_BIO_TAIL, 1,
  16                     [current->bio_tail exists])
  17         ],[
  18                 AC_MSG_RESULT(no)
  19                 AC_MSG_CHECKING([whether current->bio_list exists])
  20                 ZFS_LINUX_TRY_COMPILE([
  21                         #include <linux/sched.h>
  22                 ],[
  23                         current->bio_list = (struct bio_list *) NULL;
  24                 ],[
  25                         AC_MSG_RESULT(yes)
  26                         AC_DEFINE(HAVE_CURRENT_BIO_LIST, 1,
  27                             [current->bio_list exists])
  28                 ],[
  29                         AC_MSG_ERROR(no - Please file a bug report at
  30                             https://github.com/zfsonlinux/zfs/issues/new)
  31                 ])
  32         ])
  33 ])