config/kernel-bio-rw-syncio.m4

   1 dnl #
   2 dnl # Preferred interface for flagging a synchronous bio:
   3 dnl # 2.6.12-2.6.29: BIO_RW_SYNC
   4 dnl # 2.6.30-2.6.35: BIO_RW_SYNCIO
   5 dnl # 2.6.36-2.6.xx: REQ_SYNC
   6 dnl #
   7 AC_DEFUN([ZFS_AC_KERNEL_BIO_RW_SYNC], [
   8         AC_MSG_CHECKING([whether BIO_RW_SYNC is defined])
   9         ZFS_LINUX_TRY_COMPILE([
  10                 #include <linux/bio.h>
  11         ],[
  12                 int flags __attribute__ ((unused));
  13                 flags = BIO_RW_SYNC;
  14         ],[
  15                 AC_MSG_RESULT(yes)
  16                 AC_DEFINE(HAVE_BIO_RW_SYNC, 1, [BIO_RW_SYNC is defined])
  17         ],[
  18                 AC_MSG_RESULT(no)
  19         ])
  20 ])
  21
  22 AC_DEFUN([ZFS_AC_KERNEL_BIO_RW_SYNCIO], [
  23         AC_MSG_CHECKING([whether BIO_RW_SYNCIO is defined])
  24         ZFS_LINUX_TRY_COMPILE([
  25                 #include <linux/bio.h>
  26         ],[
  27                 int flags __attribute__ ((unused));
  28                 flags = BIO_RW_SYNCIO;
  29         ],[
  30                 AC_MSG_RESULT(yes)
  31                 AC_DEFINE(HAVE_BIO_RW_SYNCIO, 1, [BIO_RW_SYNCIO is defined])
  32         ],[
  33                 AC_MSG_RESULT(no)
  34         ])
  35 ])
  36
  37 AC_DEFUN([ZFS_AC_KERNEL_REQ_SYNC], [
  38         AC_MSG_CHECKING([whether REQ_SYNC is defined])
  39         ZFS_LINUX_TRY_COMPILE([
  40                 #include <linux/bio.h>
  41         ],[
  42                 int flags __attribute__ ((unused));
  43                 flags = REQ_SYNC;
  44         ],[
  45                 AC_MSG_RESULT(yes)
  46                 AC_DEFINE(HAVE_REQ_SYNC, 1, [REQ_SYNC is defined])
  47         ],[
  48                 AC_MSG_RESULT(no)
  49         ])
  50 ])