config/kernel-block-device-operations.m4

   1 dnl #
   2 dnl # 2.6.38 API change
   3 dnl #
   4 AC_DEFUN([ZFS_AC_KERNEL_BLOCK_DEVICE_OPERATIONS_CHECK_EVENTS], [
   5         AC_MSG_CHECKING([whether bops->check_events() exists])
   6         tmp_flags="$EXTRA_KCFLAGS"
   7         EXTRA_KCFLAGS="${NO_UNUSED_BUT_SET_VARIABLE}"
   8         ZFS_LINUX_TRY_COMPILE([
   9                 #include <linux/blkdev.h>
  10
  11                 unsigned int blk_check_events(struct gendisk *disk,
  12                     unsigned int clearing) { return (0); }
  13
  14                 static const struct block_device_operations
  15                     bops __attribute__ ((unused)) = {
  16                         .check_events   = blk_check_events,
  17                 };
  18         ],[
  19         ],[
  20                 AC_MSG_RESULT(yes)
  21                 AC_DEFINE(HAVE_BLOCK_DEVICE_OPERATIONS_CHECK_EVENTS, 1,
  22                     [bops->check_events() exists])
  23         ],[
  24                 AC_MSG_RESULT(no)
  25         ])
  26         EXTRA_KCFLAGS="$tmp_flags"
  27 ])
  28
  29 dnl #
  30 dnl # 3.10.x API change
  31 dnl #
  32 AC_DEFUN([ZFS_AC_KERNEL_BLOCK_DEVICE_OPERATIONS_RELEASE_VOID], [
  33         AC_MSG_CHECKING([whether bops->release() is void])
  34         tmp_flags="$EXTRA_KCFLAGS"
  35         EXTRA_KCFLAGS="${NO_UNUSED_BUT_SET_VARIABLE}"
  36         ZFS_LINUX_TRY_COMPILE([
  37                 #include <linux/blkdev.h>
  38
  39                 void blk_release(struct gendisk *g, fmode_t mode) { return; }
  40
  41                 static const struct block_device_operations
  42                     bops __attribute__ ((unused)) = {
  43                         .open           = NULL,
  44                         .release        = blk_release,
  45                         .ioctl          = NULL,
  46                         .compat_ioctl   = NULL,
  47                 };
  48         ],[
  49         ],[
  50                 AC_MSG_RESULT(void)
  51                 AC_DEFINE(HAVE_BLOCK_DEVICE_OPERATIONS_RELEASE_VOID, 1,
  52                           [bops->release() returns void])
  53         ],[
  54                 AC_MSG_RESULT(int)
  55         ])
  56         EXTRA_KCFLAGS="$tmp_flags"
  57 ])